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 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 0xba7d285de0e096cba3e807608e9467a2e6a234d5022c96a1c9ecf3e58032093b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a821e31b-df99-41f5-b1fc-fe5e01dcfed4.json and https://artists.proofprofile.net/proofs/artist/a821e31b-df99-41f5-b1fc-fe5e01dcfed4.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 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 0xa0b7bd7c94f647c40c942c2be47fae98bb0469965c9e0236c82cf0aa1f20001f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA622300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2f3fc19a5a61a9954e9e3fdadef8dfc72e592c6c343bb22b7525e6bd6c87d. 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/FR8NP2400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4956d653964f90f0e08325bdd88131fa0ee864d11ccf36b4213e9697ae3063fd. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR8NP2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1121b97094a48367b9f2c283bc8cb06b56261dc8fee79da7ff6c80dd4e89aa2. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/FR8NP2300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2a0f1ab089f065662789240657443e160fc26dc2b044a1c9a0d7ec91d495a. 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/FR8NP2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c35336f4b0ded9a3befe7abb8c616e527d428372ea1af963486ae8a56c37fd3. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/FR8NP2100010.
Dakipalla (feat. Henry Mendez & Pinto Wahin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9eeccb304ef8c90a028877537f53da50f4106455864922f25aa68ae9b2c490. 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/ES8622000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5c0680e7f170a4ad08f92e4f9c3570e4ad1aa873227bc491e2b833386b024. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFA2073879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a3ab76c2ef9625e865ece8d725951d6275fe1a8c227fbd97294e7b5cffc5cf. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES8621600422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0acb163a64046c9bfc66d9e2e4c08f88424176a8c9d492ec8b5363fdb6d733. 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/USJE62010000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0df4fce070c75fa67eaab091fef72941863abd50048c288276d1b43054c407. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCAFF2082646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb2a2e7aad4611904ed1b822282aaa1633d8bdad078c01aaf08fd453d8a252. Chain 2 (Bitcoin): anchored in block 956960 (2026-07-06T23:19:16Z), 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/USJE62006000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c8fff372e8a3cee942c2823a19e0732c70c55532b72f02dd57f30a18cdc89. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAFB2024376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb2a20a8543f33090316c2dd730d81746f548d7431e8fa5ad606759d0cf86b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR3471695311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188e6d580bedd619d1a6dc07c8114196a7378cc718984b50959a6f6412f9c801. 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/FR8MX2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8611eeb353ba21bbf3654ebf234abb4af262c52bd125b1c5048350e44b413ec. 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/USJE62004007.
Una Noche Mas Sabrina (feat. Big Ali, Eity & Elvys Futurr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b0c2f1b7ab025b078f85af1833e66d741db12a7dead8d1c701f95bfd739e3. 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/TCAEF1959863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffaf91023f0c420974ca0aa6ae94992f802cf16643f65ccc9c42f677c3768b. 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/COC012033580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbc6746eb724670f424fe04d80d17e1ec0285e471264789cf87f28f6a0c443b. 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/FR8NP2400699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c539bb4d4ba6f09f48bf0f67fc7bfc55a5fd6e3671065f9d9d0278b670931. 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/FR22F2100340.