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 0x964c8a2cb1f3afc505efe9211445071adeb2e06273fb3068fde7f3a4ae7eceac. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7696f36-37f3-4dd0-8e6c-7e455b12476d.json and https://artists.proofprofile.net/proofs/artist/a7696f36-37f3-4dd0-8e6c-7e455b12476d.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 0x9fbe93ef468c1e859f670981d54c8bf551ecbc1af0e4a5d43c730fba6b710b64. 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/DENI12000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb8529231d66c9feb5e93c37f6daaf7c837d6345ae918687b09d7e30b70f2b9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DENI12000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ff17ba0f63937eaf6ce24316f0756f2be1b58a206ca75aaed52227e32907b8. 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/DENI12000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7d15cc6ec42b8e2e412be255eadea735ae6e6fc8b168016230aa3658cf98e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DENI12000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9afde3e91404d742af948823f54a3a8bdde78f51743d19182ca21002284121d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DENI12300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d62e2e6b78ca2b1233002b0ba96f0881e75599932a32d2735c2dda0a376e31. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DENI12300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514670da5ac5ffbfb9606e71d8b2dc6b130a0bc019386676c37906388591b1ab. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DENI12300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed393d528c700efee84e5047500947bd9394fb15a420bb6e55db8cd93011a308. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DENI12300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02c8ca3fc9498c016a3f2272ae1660d298aacfe4bca2a84abf7e86f13dfca8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:05:13Z), 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/DENI12300162.