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 0x482a1509980b4df974202d53f1d599e6a6bd3156e0e7dd87af0ef7cad187de5f. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1207256d-cead-439f-8963-c7b93a96dc3f.json and https://artists.proofprofile.net/proofs/artist/1207256d-cead-439f-8963-c7b93a96dc3f.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 0x09b15cb8c095e29972231cd5a9a2b7437abf2d3d3c147ff227f8d0eee42d87f6. 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/TCAER2025242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6572b6daa205ac26c70e9d0e7c197e388c5df316f28e3ae80efc3cd77a32993. 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/TCAER2025258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00b9f9bf4394fa2d4be4be0a8531679960255d1ddd29b1a6e4894f173ceb0b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAER2025265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4bcd4d4b8a0e20c27dfcb140fae13678d3dd34b514f327bb3937cad1a1d43. 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/TCAER2025319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf046b744ddf5015e19d15be972be183d4be58d29dc363dfd92193d2646647d89. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAER2025271.
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 0xf498077e14b42f2a98b077327d895a14608dc1343b1357dbeede6ce6e9730480. 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/TCAFO2104948.
Las Sombrías Aventuras de Marianito Bellaco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e4f72da8704bf299b7275e858e85a37794236d3b248207b0a9b64fcc8f100. 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/QZS662169329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7719a2e824a49a2effcb437ab8dbc5b08e388d59438cdb96d65c9864ae9e77b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZS672177580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc521695cb3a324e7eb57438a48f3bcb4593a4933b190bc05b92a64a80c1bea. 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/QZNWQ2234326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8bb855b90eb8f594a15c775156546dac1fbefc2070a02e9dcec1376e5afdc2. 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/QZNWQ2234329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09de6a631841e2f34ba089dff5fe4c8d0e6d3164dff59c2f02f81a07d098d796. 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/QZNWQ2234331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c34e6ce935cb350f5b87ee10e5ecf3e094637344fbfa356590d2162b007cc83. 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/QZNWQ2234333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2206e1caa79b16410bcee92b06e547f695ff69218a3c83194f31f07afcaf06ce. 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/UKXN22221120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e9a1d2bf6628a52a85380793164a6c38d257cea4e68ebf81f9a025a360506. 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/QZK6F2090831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ac4f73bc3dc666f5462c09da6fd2359dc46123265862114cee6571ccc4321e. 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/QZFYZ2254377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17d1acade887f25c856a9935ed1dbedc7e64468b27d9969c0f8348ce0f28332. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAT2545199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309876231abe6ae11cf97bc26b5428a0c6035a143eb65a6c3db57bfddf55545f. 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/QZPLS2584554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef737dc3ae065c9641db3d3aba9c23d263b618f8f379e2f147d5d7db2a45d1c5. 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/QZDA52500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57a83431a40a027ca9485cbeb8e3b59cd598055a833627559f00f6a88dd4336. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA52500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599edd7ff8a30ad2e8ee5fffb3dbf74ad6d881d02d2e20a41c223bd45842a3a. 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/QZ5FN2587316.