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 0xd65ff2fadae0ae450977333ecab0fb9d0e7d63032f65225cdb40704269c1f8a1. 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/f311bf51-244e-43e1-8c63-261894f6c5f6.json and https://artists.proofprofile.net/proofs/artist/f311bf51-244e-43e1-8c63-261894f6c5f6.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 0x7bd63e345a22c004c05cb6f3d872f3a94038ba9048b5f85551c820cafbc335ee. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6K2299772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7fddac16406a8e0c5ebfdb9962ec4bc8d96fcea3b21b7b757d1376ba977a21. 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/QZK6K2299775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba1c86cb1f084540a031f6bb82d730bee695e31338da6b3665ff2fc5c9a0359. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZK6K2299776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42059a834bb1b7bd71987db98216bd5772c952441d38841ecead7402f5e507c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6K2299777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdd11fa63956c4e3eb8e20ffa4f3a2e778ed94074ad39ffa4604712dbe99ef. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEP2282612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685ba6e19e1f82c59d4ea73744e3b0548f1cd56919801af315338409d2ef752. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:59Z), 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/QZMEP2282613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0222100f58f4e8aca8fde6cb1572df797ae73fc2669148e0e508d9ce38d63750. 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/QZMEP2282615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46dd86e40e2b46696791920d7c89e0d89ad9e732bb09781b76c0a5ad9e00c12. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEP2282616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c263195f6c58a43ea2f3e0efbdc3946566da42148e56db18eed0c6c0a17f2b. 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/QZWFR2311020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2006b4d3618be5bf58cb15044c0b001eba47388969aee568425a8ce7742d08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2532011.