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 0x7dd83f812796b8b0db436ebfe5c3455d7ff0e192aca372ec89ec438f5c33e974. 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/6eddddc0-c739-49b9-b21a-67157f788175.json and https://artists.proofprofile.net/proofs/artist/6eddddc0-c739-49b9-b21a-67157f788175.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 0x9d8f5ef97883cee5247e034d2614aa930baaf41472bb2e6dfe8b721f6bab2a33. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM22293155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43727365f2cad5fff9f1e1ebf2995e670762eaea6d9a76bdfb3f8f54dd59e93c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:10Z), 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/USDY42478159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b9303c00fcc6300503949754bab7b019fb32647eba833f798608e14d958409. 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/QZMZ92497966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62eaf6ce0db39126f69b323f1d63a186ebce3fa01b8edbb4c2d1d812658a011. 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/QZMZ92497963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3971f0403dfd5afed8fb893bb83ef75698428754ef6bd4ce1aab4684c7e2ff9. 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/QZMZ92497964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a565c8ab6548b2721ed55281c2906d3d2668ac54c9f30f9ff8f5341ad24f97. 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/USCGJ2352174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b9303c00fcc6300503949754bab7b019fb32647eba833f798608e14d958409. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMZ92497966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f67fb5f918958482cf5e09fe4a871c17b93825532b052838b25a466e51009b. 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/QZMZ92497968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121efed133d2b6eb559242775f10471f300fa06e7ec6853fe576ceb7380dabbc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM22322123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c57f0b2470981b480e627bbc3aea9b6285ce70d85770ea7d096a5292fc25ad5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJV2478516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694de46885bef00ff8da743e969979c70ae9a5ebfccca8b2fee1622c1065165b. 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/QZNJV2478510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddae7f85eba4597890935d95b0c184ffcb57b4a53038c8dd781626e2a7e06a28. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJV2478511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121efed133d2b6eb559242775f10471f300fa06e7ec6853fe576ceb7380dabbc. 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/USHM22322123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bd5103f6c623ee800b3368f941269787eef00e4cccd9ecfbb93d76c968160. 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/ES71G2427027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bd5103f6c623ee800b3368f941269787eef00e4cccd9ecfbb93d76c968160. 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/ES71G2427027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1659c8e601ccf6164a9ca7fa15233bf009e8f4d3c4d7497bd8bc293f589c7. 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/QMBZ92537387.