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 0x2630106455dcda4986549b0f84357ebfae9a6011a47a56c194791ed1fd4408a3. 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/1f63f329-fe32-4a34-8383-31fa0bc7cf11.json and https://artists.proofprofile.net/proofs/artist/1f63f329-fe32-4a34-8383-31fa0bc7cf11.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 0x3bcba05e4701b43b6fc65d061ac1765337757071b15e7863bd03884dc7ead2f0. 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/DEKF22401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad8ecf8662c47583cc4b620c0562cc3f22a99e18dc12a36ce2d5dd7de94073. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f05712e17527600e6844059d20b4a9792a4725d060d440d567a0931184c9553. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f31e1d7a318ca01b5cebf71e702f24373745770b34d84bb4b1291312ae0c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93da4d5583eb97410f207ec4ec501d5657bff86acc8ba6e723c83197b3be379e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aab5baa2fcce924adb0a99d306417ea1a3ecfb68c2b0ffa6e7e820e00db1f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482c38f6f993acfe1bbd1020d10e4b3bf2c0c3266de04d79934ee6bca7d2a76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128c250361a9c02210c492a0b543fe4b95f243b6d89b7651ba76c9b4a0ba68f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16593286eb5e5112b2ca070278fea04ccdf0cef8e41520d92a81dea29ea77971. 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/DEKF22401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59a2bae75375f9451d723e0cb57da90337a1e038f06b9734aa276af59d6ebe. 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/DEKF22401111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56569efe0583c63bbe84c67e4964369cfdd5f2219cf1bd6f827d39ac3d6c4409. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c793e2ff71171ec3157a9c43031266212fe2975d19794fbd9d36115fe80d89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9c566eac9f74c46e88e2afc7512e4204e79e52e2920fd27b30412cf7ca895. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e281bbad99aacf62e353d3c4f0a3c1b4dbffd03d1e1e61f2cab93c2f53fd091. 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/DEKF22400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda08a0d7278fa79937afbfe140da92967d6b825c9c3ab12bf853540351f696e4. 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/DECE72200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db10a5743b9f26ca8223c759db291bb8ec79621f0d243adc42af97391c660d. 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/DECE72200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b86d81d6bbf99793857739c992be1e0785d79312d6521a75f094f5a5085f0. 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/DECE72200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b8412a916ecbb0916513681303b0c5e736cafd98c24fff8d49d8e4f5b485f2. 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/DECE72200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5444839d732b47d62bb83c031266e104289d9dd1f1f5a4bb0b665765a6b0a22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac9f9857f1032ef8baa8634c701e03d6b24953cc008bd1c9b461c08d4eb598. 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/DECE72200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17115ca043f27dafa8294645e3d7cd54d76e2de80722549acab2d80fa244691. 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/DECE72200576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f00b6b2bad2cc56eb7b529bdc3e306d51ff3671b156d819d48184297fcd07e. 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/DECE72200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda07a960ed6300b1ccd590a1683d8aa65506aa54537391ed4c80f12313067b86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72106295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710997caf1ae127273c96aa4aaba2b081bda8e269de427735624af944018a58d. 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/DECE72200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0571636cab5900cbd4e7aa982f7d38dae5cac11add72133af8c9f9f955736a72. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ec5f7eeb3d1ac4f047d299f64514a8fde376d4f187bf79a35c1db14915359. 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/DE1FB2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd201c902a38a0b3e6302e8a50b416de9d5344dcf3dcdefe18029a8a475b7f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DECE72100049.
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 0x99a7733684c031a0721b76f3e547bc23eef6e9088214d981d2a7537491906a33. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DELJ81952970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df86de44a3a2de1850bc1fd2bac13f0ff09c5366d30211f5539d49cd0ffbd0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DECE72100946.