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 0x5a7c4d26d4c55a7673f00c5ef32f8e2fd5df2c6d32ea73f45a54c2183eead161. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac34bbac-6fc6-4d0c-b88c-0c0c50062d94.json and https://artists.proofprofile.net/proofs/artist/ac34bbac-6fc6-4d0c-b88c-0c0c50062d94.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 0x8f7989308ff8da48dfabc50c2ec7eab598c0eff984df24c2ca58ab9ec5804e0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72465317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659b99f5c553d6dc455e59d56760577e1343c484dcb3a9efe10cd5e26e27fdb3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52447348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe3892c882073971973c38b258895f38a5b33ef8944c1b7d0a7d4e59cbd909c. 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/QZK6M2419233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c396c0ae70168ba62d66a1b9a5cccd2d3d4e55e843592a938b3c0d792f3c379. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZNWX2442696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e7c52f1fe6f743e629dbb394f01f7a9b4e0727d9074cf5e6f9a9a939a24bfb. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTB72427531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da09ab3a5ac42d48faf1ed7268f5c7b5efa16f0f11f9c768a57bfc3433f0cb4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBF2409868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afaeea7f7d67e59c00039b9fcf253abb043d4eb02c6eb4a3ed2d729c255ed75. 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/QZTB82590744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc7a391874605f1164e99196bf49f405476de603782e3d46cd91812016ba3db. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:13Z), 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/QZTB92530847.