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 0x0e25a4deadb74da1398b3eab44de43f9fc608ed78927c539a2b86ea510fee7af. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d681849f-2be7-4247-b3a1-ba2846c51a3d.json and https://artists.proofprofile.net/proofs/artist/d681849f-2be7-4247-b3a1-ba2846c51a3d.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 0x1eed74edc95c3fdca75c874fc1e999a65f2a5e4e91818f5a83cb807b5984df31. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USX9P1262550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31db82efb6eaa0174e2ac0abc52303a1bb5a66d2760c2a9be5b4534c7f0a4983. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USX9P1262551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d88eaa1c1ed2f4865a9ee316fe477a36b1b9bf9deafa02c8860090080468e42. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P1262552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a8cf8dd999221483cbcdce58724cb6ace6e24ba4c696b4350c62ac65d5d22. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USX9P1262553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e7c786f1ec8c3d27962d1358642116924d23d178c0d64ce501a9fd743fe10. 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/USX9P1262557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5c1246922d202c096d36a6c445a1456be19320d45dc70cc3daba80d531696. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:32Z), 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/USX9P1262559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aeb08be14d4bb073aa8bd99b95fbab6a1c1142d8ab936687ef94fe8e734c54. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81577958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789444f0e4b5e98589f84b5451404a9c07b45794d46643efd1a8de239c525063. 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/USHM81577959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419bb44ad2896c94d6d7af63b6f7fd2aabd0e0e910aa55ba81a205cc1b4ac795. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:28:08Z), 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/USHM81577961.