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 0xb1b1aaca6ce007432e615dec95506332d26396db1e696844c357af9ce0eb3ca2. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c1480ed-75b3-4b13-83e3-0a53642b0832.json and https://artists.proofprofile.net/proofs/artist/9c1480ed-75b3-4b13-83e3-0a53642b0832.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 0xdae48f89918d80c1e8d03d43488f36333a98aa8bc81be6dee3ca608fd1fbf6fb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6N2280827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80094d57627e5fecdecc5987db03f97473b79d8d34215b3eeee11602093d5c19. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZK6N2299803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe57127ce33db80d080949bfd373cdd580cff224a4baa65c04f9615c2487ba1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWW2257665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a63200a56d1173df8ab434ed4b42862a57e05db836cc78d688c9972fd28f55. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:27:13Z), 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/QZNWW2324548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8990c4b22005a566165aaf9ba56e3405cb8c9c98b8c4af1775e643d79d1f3d5b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTB92387727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d9b687a7997ed4ef59b19c20daeb7ea1fdbb899d053ea869ddc6b934cfdb71. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZES52471621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a1320b901cfc20d6ede267db5e940311d77a51f7be67b08afc288e8c035e3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:32Z), 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/QZNWV2444596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5cce9e46abd46e8b877201b032651520cd60cb76a93f2ef66699086dd5b42. 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/QZRP42425847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6296281e3a2950050d92c1c54031973af1efaff518acf510ebff6c08763d4d5b. 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/QZTB42475998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eacab90f1d498fe4b8fc9426851c4549a86f4a63679f961400eed50abc9434. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFF2435374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9010644e4a213b96cfea1b26664286fa792873ccc5e2f5332e2846e008bc9f4d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:09Z), 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/QZZ7K2485693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b5cbe897064d62ba47bba5a6411ab07c46f0f10da5fcbf3fd29afe501f2033. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ7Q2473037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb5f6cefd1ece4b614245088c2a82f2c9d988fe7aee6c8586ef923a992ad53b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7T2439580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f98fca273ad3f83deb6676faa43e605bc5b7c8f90033e2b854ff90cb3fe252. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2503201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad217a5b32293d792c79842fa03dadfe321ad01d3b8c2d10603a71235a2b8ec7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2509835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db97aaf3cfc9a452f5afabd31b8ce2a6e031204193016d5f4dc831cb6d1f025. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZK6F2511511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be852056b86f5e6a75f2814ca79337c704b9b9fe620f5c9f90456e6f0a70f2. 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/QZK6F2506491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7ef62198748010c30e3a793e01f65cbff70b3fb59c43662e469f979f76dae. 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/QZWFF2543150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf17ebdcc1005d74d6831cee9161a192d0ec5224d69fe2f90d8b8faf743077b5. 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/QZZ7S2527208.