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 0x640804aa45ee16ca19fa4e240bbd991b8205c93f7fcdeea255c59b23b284e7b1. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0eee060-659f-4fe4-891d-3b77e9cd3d93.json and https://artists.proofprofile.net/proofs/artist/b0eee060-659f-4fe4-891d-3b77e9cd3d93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carmen (Original Motion Picture Soundtrack)
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 0x2f4967f27172dd9898126621617464ccd0379843cf52047e447d84ac8ee2b37b. 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/US4DG2300281.
She Said (Original Motion Picture Score)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abed15393101015b619465300273e85a4a60a185f437b2ae76708358acb46da. 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/USQ4E2201616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa861329079dd322b56d3a1a448fb8c84d69e1023d8dbbefd543a665ca3f756fe. 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/USQ4E2201617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5989059e307befb48126e76074b42ddeb54dbe97d6dde152d181ce4123dc7. 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/USQ4E2201618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e230ad95de7d850f60b8564527b6906961e41e1f0ad5081602a122f8705df6. 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/USQ4E2201620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd417329a3b6407b439aeccc7c776752f40429186e42621d786f5871f76e50c7. 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/USQ4E2201621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00983a30bf30a55d22e2f10e9e8e70ab749df41e296416bd8145c45073439970. 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/USQ4E2201622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65187d5a4b7dd4f47a3f63bdb77d16651aad451ac001c91750d29e7e19b4749. 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/USQ4E2201623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f7f73340e8c55ca3e949b184b2f7e7576700a312470091be2d1aa4dba98f6. 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/USQ4E2201624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa88b704f0d4117df4004fdc455fedcf5cf3ffbbb5dd85ddb2e17a9a13d26a46. 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/USQ4E2201626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6e307a4c426dd5d11212681e0d5be9ac5772d591a1c81782d31b6d9dc9b50. 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/USQ4E2201627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc23d54b91b23525f54224f558b518b9254585e9c36596f21f5fee187c8954ff. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:19:14Z), 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/USQ4E2201619.
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 0xd39375223b9e987f86943a99aea3b884008922f32a1d3093f08a304ac102f465. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:04Z), 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/USQ4E2201625.