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 0x9afd9610fa1bc5b265c9e34feb36a36a2acee6411bd9479c4a902ef571a8cfae. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3616142d-c7fb-4b15-93fb-481e5c02ae96.json and https://artists.proofprofile.net/proofs/artist/3616142d-c7fb-4b15-93fb-481e5c02ae96.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 0x92636c4538b41666953c75d6273daf9658e75ec9a207ff4d98e23a804baf9796. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM82120416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd752a811b93b64fc8d9de241936b7b5c025c9cf1a75d3dd413aa4a88514d335. 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/USHM92193994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65adf49a64bd2b5cc4f6674b8c1b1bdd62de0930eb20c882a2d0157fc17a8b25. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM92194051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2df66e8fe623491d18f0b0147526cab4f6e1c740b53b0990396dac012b02d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:53:42Z), 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/USHM82297027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f056a44204c96f509621137ade855da940f85a070e12cd64849355f28c4b7. 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/USCGJ2305203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019f9e1d3729dfdfa59b42613d6a0052012cf6bebd88793cf4dc88f5c257532. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2305273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3498c03eb41bba795c15b33ddc9538af4a40561747f6c477246841b990617b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ2305365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f82891018330c706e634c7531fd200c4436fdf906c71e4dbafe64571dd942. 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/QZW6A2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03d416dae062d22398f09048eeb9b31ced6528b5069210dc40ddd686e17241. 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/QZW6A2400252.