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 0xa55009f7997db1c5b1b9c10dd3c247e8e88a9d3575b695f7908596ec36fde185. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f8ce14f-8111-4a92-a424-b0751cec8041.json and https://artists.proofprofile.net/proofs/artist/1f8ce14f-8111-4a92-a424-b0751cec8041.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 0xeaee6115e575e5102ab5f845f9c6bbe6b80985af9d839bfbe5e7d877f497a339. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMZ92180882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac4326e1ef9572f05cb3bf6a6d3f014309c3d284796e6f09fe5c3996427ee33. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BR90B2102775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299cebad968ce9070d841c1332ed7689d069e4ce0330119efe28cfed23e7383. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9K2385196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2be9cb6b9f19f09abb1554af4f65d20dfb87be140ab6b10399d70ccf6a9b9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRPYL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de12001bca910b2607d8afdde279888ec6b73dae44844388911fccebe3a5afd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRPYL2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b7e0c4d717e0ff83598f19239a0bf7d12e1ad63ee8e552f60f8669dd97153. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BXNYT2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605fcf46c9ec9e84f818796ec4322b1e6ab607e266f5e7cd54726ef13756fd5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BXNYT2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a528fc88ceea8be80609a7be73d0949077a77a8402c30eb3ff057d85aa5852. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXNYT2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460759b3e452b4ae7b83f302d392a180d36d49f743b1d21cf33f63ec5ea08859. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/BXNYT2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf772210294a6cf87a320a65a69b3430492432a640d6b6fcc103447b08a32c428. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BCDE52500050.