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 0x27b5d4964b3810cff8bc8c1536c5f2ea26445beb7d6ed68dfe17fac186b831ee. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9043b59-6432-47cb-a58f-935e0167bf86.json and https://artists.proofprofile.net/proofs/artist/d9043b59-6432-47cb-a58f-935e0167bf86.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 0xb150c3ef40449dbcb0033e2f5ec39cf6cb85e52215b00859ebfb5ea08732d617. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US38Y2525395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9ebc95785d5b0dfc6927307691ac20d52034581a8da83b0e0e3f63d7ac0a44. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US38Y2525396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8761b50bcef6b7730edc4d24ebc5ee45ab373430e7a33d23c8ddf9db6386388. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:35:57Z), 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/QZES82527564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4adf1294b5e7049f9c895c218bf4c4fbf9ce43087d5b94532ab32f33b64441. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:46:00Z), 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/US38Y2525405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278cae28878288b67d7fab7b35aadef60bf74ed8a42595980dbffde8f64ed6f3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:06:17Z), 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/US38Y2525406.