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 0x9d38a034e894be630d8661a8dfba945ae4d89cc6ff2430912b307d5ceaf072f3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/744ea278-184c-414b-95bc-19963dbac5df.json and https://artists.proofprofile.net/proofs/artist/744ea278-184c-414b-95bc-19963dbac5df.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 0xd414787e0427b0027372cad44c0d57d77bd09d961ed28b3d184d8ddf1c71dc4f. 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/QZTAY2254662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1feec5af46168fe5d444c7fd14df0f62fd58bee1c3c49db1c765c183c98e33. 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/QZHN52329565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835847becec3365b1d57357d97869d1b3137752ad71a4d4a2c9bc449153f098b. 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/QZHN52329566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772146e19f6b5a4f0391ac972ddf820ba47371fd2bcd6f0a89ff06709e1bab35. 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/QZHN52329569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04106139e80d56ec2c26086b7c692526d58f1e47715d60380dc603154c57024. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRE5R3000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813eba30a35bfcc2a07a83f3648e1f49be24a68f2aab32dff6eaff1bfa14f64. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYX2434844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813eba30a35bfcc2a07a83f3648e1f49be24a68f2aab32dff6eaff1bfa14f64. 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/QZFYX2434844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e86364b6fdc725db712341df9f22ef1c3475eacb88af62fc519e475789d38fa. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRE5R3000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7a53c9b3afcdd5ba6aaeb74beb1e575cfde7cbe8f530a6eca642ab82311bb2. 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/FRE5R3000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d0b09be70d953d7073012a98fb91091c4cf06c0c868285cadd7fd3e93034c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:26:48Z), 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/FRE5R3000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691e880f8d96b0b71e662b6c13d3ec64b3c08cab99bba4952c7da7dcbd5b7b9. 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/FRE5R3000013.