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 0xe29f42742fb4730ba4f4e4458c5092f1d954e23169d8ad8c871254dfc9168a1d. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17563940-a7b8-4786-bf17-f4ae20640a9a.json and https://artists.proofprofile.net/proofs/artist/17563940-a7b8-4786-bf17-f4ae20640a9a.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 0xde0a371ff4b40ca407f4fae1f3a7cd0a7749935cb94f94ff8d10f575a8f7d061. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41873352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1872cc2f979a60e59556bfd74b0138d4b274d0e55ecf7b622971c6f9120c78. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME2163879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8c397a2d493b107a3d153a4418b1315ce7f707a54b71004a31a7a5fe55a56. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM4TX2361336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1acfeda4484f540c29a8b007f2caa792edb9b392c02c6667217621eefd5fdd8. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZTPX2387853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7751447f93b44e845f6379c0e10aefb1435db231c3d76f2c8b2a72d4c60b60. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTPX2387854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5ff65aa575306cc1e448f159046fc5e066352145184a2232a8f4881732ab0a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2387856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c746f319f9784bada574553968fa7478d48f6c07a70c5dfd5a218acf9fcc2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTPX2455476.
Huapangos Medley: El Tacatá / El Son de Amoltepec / La Danza del Chicahual
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91958a5427ca9c9d5deceea7b6115de2f30170ba58e8f839cc5b8837350e5fae. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZTPX2455480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d15de83928d086512a4e6f9e690d88db5b9c94e7eb8b8e44692a30e3a7ea22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG2522813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c52169023cf3519bb50513215511b8c7b6557d7ee9e6278fbc764359820f858. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US7VG2544101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1541e0db7f7071878c5e3364970d63030867ae59360c5fd7fecaa591a367f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMZ92539394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a42494a62aff035a3f92537dbaf1072c3bed14758a034fa6ccd4eb4fb6c62e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2510696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44759eec492a79bd8e354d64a6381780c9440bf4ef814e101be91ce841a4189a. 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/QZTVM2491167.