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 0x28bb01c7b442284911764ace233257c3983b2cd75f14cc695d60dfa4069f310d. 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/a691c05c-667a-4d23-83d7-6c69b0899fa1.json and https://artists.proofprofile.net/proofs/artist/a691c05c-667a-4d23-83d7-6c69b0899fa1.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 0x6e3c1decc77e63083b21a128e4dae134b2d486d8f5a4241b703da06c3928cc7c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHNA2191617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80034b16f33e2c6f7c20e905aa5341f65c266073c4f428a8a12cda12d5f1fdea. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:42:01Z), 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/QZHNA2190417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae88b4f1a706ea79756311f799020750dccd24ca1e72cadc92bc7a34cc7a48a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHNA2179542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf217d4e65fc14731868dc56f33658edd6880a5597431d6ab907d0e8f2211758f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:58Z), 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/QZHNA2191668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bfe4e922090aea4afc4a2673d778f9dafdf452641c35d1124575ba8d6bf322. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:13Z), 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/QZHNA2192796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c84d0a5958c7d0aab13445fb8c836ab8d7f753c80e8804c7e3e3580172df15. 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/QZK6G2297078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1bc2778d2dc985480a7753b67521e81e43eeb97bd0d25e813aebcdb5e135e. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTB62422868.