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 0x95a2081d7318e044caab9e65e14d087bff9f8404f336dcc4235b71cb78b9ace1. 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/7e329fb0-a719-4b66-8fdf-24c210984fbf.json and https://artists.proofprofile.net/proofs/artist/7e329fb0-a719-4b66-8fdf-24c210984fbf.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 0x0e7b3cb8a45a6ff58cc20cbf066e8bfa0ce1cbf8b3b2d59ebaa0a4b1975531e9. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:51:12Z), 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/QZES82240781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ab26b9de01e839d416642d3e283a4f03e3246613fb057f076c9df970adb7fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82180497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7778587c617a5d82f88f272e4f1b652c50464d1454097bb21b6866fb029f57e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA42327700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa35d93aebdc43cc04d542bccedcb4ac17d07cc9699c507876b96e191380a27. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES92103478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969e52e0d107ae98c88c81f16a34b5f78d595585047e289c5a9c277ab5fd9c0d. 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/FRX282570633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c3fb740625046f185b3529b16fd6b106f16c77b7f0998f45b9f083d0c14d4. 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/EEUL32402375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fca45be2ef04502aacb45d6d429ab49a17bb95fd640d67a9662d07a2c9ec882. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/EEUL32402374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65df2149fef78aff970f1c63b7a2d46e19f491153a2c143ab98f9899d19b131. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZES72138733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eae7cbedb749b511c02e918795254cbdb4b899b16adac7e68c13e971f2aa92. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZTAU2151511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de0df943d6cf1113c7ed8da66ce2b228b50ed9b5b92e32916a6cbc61635e7c. 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/QZNWT2251082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150655d63acf86787f58b3e6cda35e6cf3c6e3b774da68e325c1e3c78c575c13. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES82115428.