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 0xaa83afffe3414c6d7e3d7722d3079c99c1252472277ee668be42fa1b9331ef5c. 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/2264a098-d5b7-4dc8-9eef-c2bb25d84a0b.json and https://artists.proofprofile.net/proofs/artist/2264a098-d5b7-4dc8-9eef-c2bb25d84a0b.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 0xcc486a1c1a3e7e6ddd0839d3be8e4fb6fdf0e5935f06882662c2d89b66e2fe16. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:31Z), 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/QZDA52271000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc589f10cfbbbfedfbdf28d1115bc11698be785cc45049817c3a84fa8f0f689c9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHN52226125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f75368aec618dbf4e1f6c3b75ddc9b8e417fd5363b0a4b3327b50bc3475b7c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN82291045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23987232c9f278ca8c65369217e98be37e18dab13296fb960736227558409832. 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/QZK6Q2239049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd41ae9cbe00399385b390c1974dd8ad475ddb0d865d901c15ac2f66385b42. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6N2251077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf60b9eef86b51c9e8c37071196454caba8fb4600587756bbd34187a0c1b0730. 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/QZTAW2304299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb860a9edf5aec70a404c43d372f546a6b1235b4b6b0edde2da2ff290de18bb92. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTAU2381678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50bcbe745282db21e1c014dce1efcdc366607d37a2bbe6e8fb6a96cd0232968. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAW2321043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb299a7d57945356ce384441adf1ed11c8094dce08878fb06ba466d80b0b03b7. 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/QZTAW2326635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdc73264c8b288a73a2b6d007ce49938c55574156d0adae33fccaae64de49f7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTBB2353351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238df73a5c8070f85ea438e39258823fdd126ce700740679d1189ef9d806561. 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/QZTBC2305120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1848a9d53e8537bae000384931f5280b26e16572d5a9f16df5a76af40e802dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBC2575695.