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 0x21b48b9d466b6653dffd9488e6fbb4905d366e788f47a272143c41be4b60161b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea500518-fb3d-446e-b0b6-984a6708f95a.json and https://artists.proofprofile.net/proofs/artist/ea500518-fb3d-446e-b0b6-984a6708f95a.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 0x5d7398c37b165eede82e37af400209394e6d14ef20c38ef0e006b1074d0a9eab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:17Z), 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/QT3F42414913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e8423d746548bda8704943523fd738cddbfd778de8cf1ccf0572e72dbe615. 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/QT3F42414914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36609c5243bb7ad05a5c186888c25a55beaa1f224c712a1d1a7b853692c2c69c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QT3F42414915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c8c51455647f3d4a12be2a3da786486e7d224c2e0e9bac0d703a41155f898. 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/QT3F42414917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e88098a6dff6d60eeeb8fed606a4c766f5858b3d86f3ac4e55e709642a32d02. 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/QT3F42414918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1a98fee46565356145b38c1a7b83f9dc16fd8690e4086b62328477a3edcdc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F42414919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f26eb58cacbc41d2e330929dfd883037df174becad35ca7b04ccd237872eec. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:42Z), 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/QT3F42414920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5eba70ac1a9dd8a87052f3b1facafb9a485ff0ebd507f8b9d11bed86529a58. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F42414921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b40dc3cd83634e3edeac5d3ba15dd8c383aa90c39985e351834d0da2e0071. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:45Z), 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/QT3F42414922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5030890504623fc5fdfd0c4a391df588150e7cef5c4e4410fe3ad3e28a3bf913. 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/AUBEC2487564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6b0a85908f7e0bfcb938749ae761d5c71c557e23761c60930c4c697afd8041. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:52:32Z), 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/QT3F42414923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff97061b5961db33d0cbd3b19610622f01e87876565aa7a50876f8f08459e3e5. 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/QZZ772510595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186ab6f6b923b5b62f5393707d5bd77bd2e750b44f9aacb56e85f5b68cc4b0d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZZ7U2573583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776624621b070b111511e84fdd4dea03185115290e79a09c7e26bda7beb0e4b4. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:38:00Z), 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/QZZ7U2573584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceae0f04bb369d4480995fdf179c0e0e1b569aa2abbcd9c7c4e25a4d91e524aa. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7U2573586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1366503666d05bb06bfdb12559b7e1dfbf69149bc5f03d4072a337bdee60300. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZZ7U2573590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faadb7ab023f240b33c06671b4f35648164ce57f88db18d22a1504b9b5c0b91. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT6E62509902.