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 0x93b65ece4e10f89c3096ded67bb899089fd679af317f76fde9825e496da1e154. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8649e748-4b86-4c32-a96a-3b2bd08ba345.json and https://artists.proofprofile.net/proofs/artist/8649e748-4b86-4c32-a96a-3b2bd08ba345.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 0xcfde7262af1ece332ccba9396c0f54d21aa43ea9d1055c0687e3f163051362a8. 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/QZZ8B2512125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dae556ca5391436bb105a904512fc22834e060d01d44ef39c29fbae9120974c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ8B2512128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426396fb3364f7f99c8449200e5b59881db2b3f6d3fb2c4d173111c7a8c94801. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ8B2512129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e0e3f526ea43e3637f11a1be5024dfff9c19167af129c3bc18c27393bd28e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ8B2512130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae462aaaef37a37132a08b6653810e150594d93c96d4eb68d122266eaf78698. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ8B2512131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102f26586c30e89d15a176d4c3f3559e8d44758f39e219ed458fe27f8f9a6cce. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ8B2512132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9808d6244445bc9b94572514f27b4d21985e506fc017d17cf97c6437ce06a4b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8B2512134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5094f1e3463c77473f9b3c662a295508529546ecd9bbdd431ce7cfd39df3b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ8B2512135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f6ccb01bc4ce3916a4172663079f31d60adc2e0195ff82612b93ba0569f38. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZZ8B2512137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2976565d04bbaf3fa693dd9e47998fcb27ba3eea8a66fb49c87fbb4a4a725d50. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ8B2512139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab209d5c21ebb3801f92fa68e92fd1c82753d2e41b3a39c49f174cd9f3586f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:58:01Z), 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/QZZ8B2512141.