Pedro Mario Maffia (August 28, 1899 – October 16, 1967) was an Argentine tango bandoneonist, bandleader, composer and teacher, as well as starring in several tango films. Early years He was born in
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1c4ecfa35bdaee3488f339b8941d134e099ac30145ce11329fc5017d906e85. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d75edf3-af7d-493c-acb2-709211a5cea4.json and https://artists.proofprofile.net/proofs/artist/4d75edf3-af7d-493c-acb2-709211a5cea4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bdb4ecc8e505ae178f858d074b7b4c94141fd8b260bc9b287702dadf561444. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE2209405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4596503eabb2c9ae88088d3cbb9efe9d2e76b527dd42277afba7fe3184fdabaa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE2209408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5066075b69e1cfbf4de5694da864879088bfaf47e3396812823ecb1fafe4a35d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE2209409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0432db83cfae5688bd68c543457d4b92e05438187c1aeb68b74dd35532b7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1557493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6413817062f9a5fbb6f4e3ff546e4e169e7fd555a432bb5baf0273a18d5b77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1557502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e89cb549ebe9a7659fcb53667b4d2f631d44cf291314cdc1ccbae8a1e0d1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARXP71605258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f51c696c298be82b4b0e7d62b7307e8111b3d39d175ac298d5be9e5067fba8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b306baa219fbb9085d3d06572be3f5637fef15a081371ad518f6049de40e2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4929a71e1f27b49e9279738254a8c1d868b0889e4a2429b8531ee3b5c3b0047c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549381.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd212ee51887e31fec69f6f78062153732c0e367db11e44a573b6c201f6fdc30a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b5df0e5cb60ce586f8ea77892fb4978ce4b354a9e1fa9e7bbef60f221c67c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09439aeeb284b848bd1f519a9d9ebf11cedec84b1969336252e98860219a8aa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7444f9a97fe5aee84a624dc8f0785867b3739e48b96fda555d3b7d19f0978. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41191d57cc36ed5c021fa2fd992b0198ef94b9461fcf02a84d02bd82fd4c286b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8145507c192f7fab2d35ebcdb4140c4201fc8312e60fe562280ce45e6390b8dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c72653a51e13c7a181fd00dd35b85c00a3025c35291b3475a6b5c2835119316. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa506d0469dd31436b05382c2a75a6fd72dfac8a8f8d25a8737f7abd458a703d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1549924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3715ed6bfdef4b0001765bfcf04479c9c530adfe9929cbedaf3f89f4659f4ad5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF411101384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f0b58c50fb05b566e10e023ac53c1bdb9fc5787b906137c9afa4fc23778191. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1705259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96781426ae99f4572bc9da5f8d70e552102729080a9c7dd2e5ecb7157e0d28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1705260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff417dc8cbd00655b5037a6f6820924db2c4e77421e74d4612967450be282262. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1716312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6816abc1f8622f78cf674178706be933267b0d90844fc1a677af504728c4bcd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd0e4a5c83101ee857f45c8d71ecb4341820b60dbf1ac010410bb0cda8fbee5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1537746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6048d491774b56082fa3e04fb7ad59df7fa815899677fa25d990c6ed0c776811. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN720300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6f28652dfcb0a89b27750beb2f6824249805af8b892279f22fcf010ef3999. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0144075ced61f2c29e7ada3f7f7228aac36ef7885e0ef5aa38d59af0a3920f96. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc815ee5c57c7ef95e31166a71a263668f27742929c602ef5fb122c500ccb9628. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba24e367f8982f2560ab18f2bd67f78c8adef149183302b3d3061e076a6204ce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3756859dfcb7a55071db44062ca7dfeb1b9bd7a083700f5bf1da75e20c282c9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854bf3fde1fdd0b2ee547cb185bc844002bb49f88655b4b11a75cb3bbb1234ba. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b46de375314567f25675ca2e71c407088e2343f4a7f56af2df769f93bfa8aba. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc4ba57062fc58e15af3b8558c66e0a5bac6651dcbae41be103f94767d61fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b703662b183d29fe449150758bec96e0fbe5bb932900f93f3319428870bb2e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64af7d1183bdc436f928b017d12a256b124d92c20d4e40ee9ef1fd4c2519102. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d98cb3a6df6786133a46a4b233a2b561d821958652002d08c501b6ab0b3aeb. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced7ba523ae3c35ee66ec82cbf6cebf5fb3ed43046c9e305164aae2df73904ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561464dd5f979559703d7bf73a5676a3af4803ab13fa205208e4dabe02c39936. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c7f2114f7976b5afb3d5fe3d4e1960fd64c0ea768ec089ad6f5fa143508e0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d69b6e5d46e1c69dd81b72f054c7b5e87bdb05e30d635942738eac9b1ade1e1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe118d067fd75a6161389cfad24445d5cec21d79b07647b813573cc8c7f16a96d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea50431e1fbef0e3207b5adfcf6635a57a7f3e44f7be097b66dbeb42d2433a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76be4e13ee5291f5b856d88baf43c785c3f211691a591f403dc006b7e20da22. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e0a7699b0dc4b72ff67ab9821063f740fd1edf1bc12bfdde922743a9b8c5b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1800656.
La Copa del Olvido (Tangología Para Escuchar y Bailar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f78866da297557c2c83f682bf689a1abcae03b2eef9c5ad6f729f118755753. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COVM11612104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf8a0fbdf3022b15b547a7bf043406cf8a937cae7ace822e41c1e0650d52c90. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COVM11612106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940bf19b04e48aed052a5c6f86df36a5475d3e3a1ccc4d4f660fabb1013d11fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COVM11612108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c10c84466a35a913bb609fc2862e44e1657f364c39066c51d5bef2c6d992ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COVM11612116.
Tangos Argentinos y Piezas Líricas de Grieg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ad2165cb0d8f7f96d57acf34f4af153b0502a1b0fa874e7575bc2e3379e08. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS2416090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39693fa4552d87b3a0a17068670ba1964829778b5f55b53ab58a24323414bfba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF220500571.
Argentine Argentina 1907-1950 : Valses, Tango & Milonga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35425ab0a36f713cbc27e17e0dee6e18f9fb502981a1c0c73de080dfde3ee4eb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1706022.
La Fonola Inéditos / Orquestas Típicas en Temas Instrumentales