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 0x3cbfb3e2aefedb41d83e68d9f738197925a566b453d9bd0bef49da25274a36cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3602a60-55f3-4e0a-a01b-22a40bc1a2e0.json and https://artists.proofprofile.net/proofs/artist/e3602a60-55f3-4e0a-a01b-22a40bc1a2e0.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 0x81d8b6abdcd972c8d9719deba93b8161273956ad1116749632d64d333d54c4ad. 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/NOBZY2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1027b96241e0878726c0247414c321c251f244bacce2cc8dc6ed81bc50129. 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/NOBZY1901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794715f6942b7080fbec61f8b249b0a8313373f66934bbca4b3a70f97b578354. 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/NOBZY1901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c46436a09b9254183db6bbfd0dfc5b093fd50675bba92ac649ce484e3caad2. 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/NOBZY1901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907d774c9a3e4934e238a9949339e49858061ad1c14274980617afe193f2c57. 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/NOBZY1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f84edc6a9d6cf38be9c026305084e96b1be348fa880d08da243a12f720352b4. 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/NOBZY1901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5c66e4b3081fd493512fdbafea4082ff3e16abffe0de3cdc29cf2480046cb6. 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/NO2PX1901180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907d774c9a3e4934e238a9949339e49858061ad1c14274980617afe193f2c57. 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/NOBZY1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb31b2bd7132158eb14a836b8602678b97e6ccebe64b5184564dbe46634902. 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/NOBZY1602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1249de33c8590b906d46cbb0b30f8a7a068934b27b07a319ac37d810f6782e84. 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/NOBZY1602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5995ebdf90f4d10b04626118123a34c8c3acdd72b573a327c602ef01538892b0. 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/NOBZY1602003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f45a66fac0a037346bf47f51f92fa37e32f7b48625015fd7e987fd109d542c. 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/NOBZY1602004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17df9d695ade0ce2d169a06c2371d50c1b996cb8011eed9f93550b6e80045d. 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/NOHLX1869040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0dab457aa3ad88bb9324084b3e4900c867be719b82ea281e2cb88a3cb747c. 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/NOBZY1303020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aa4c3c3f99a712186546c9899f8b16bf17f91b50a6aa280852bee3618a179c. 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/NOBZY0601090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7486a50345443d81d8addbc3900bb76aadca1783872d840ead28c7229d5412. 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/NOBZY0401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90230fc1d5e67a06a15862a0fe2351346c3a40a89ba49de43172d72b981b0f1. 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/GB5EA1502212.