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 0x2e2910848953cb52f763b0f56b17dadff37a196e06193b34fbbaeaca394a3d63. 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/fba45dfe-f815-482e-bf89-29602dfaac4f.json and https://artists.proofprofile.net/proofs/artist/fba45dfe-f815-482e-bf89-29602dfaac4f.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 0x5d9a9a2dd232c5b699fbf1a82fcbbeee8fdd490d3a13443adc2ee387119b016a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:31:32Z), 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/QZFZ52035928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec736c8e302d000facd15b1d8c7b5ce8c218adc3cdab92f7e1e398abc6412b7. 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/QZFZ52035929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a012090627e023b74a0bd47b8cca3dc735905f43f7860b18547b7abcdf0f733. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:02Z), 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/QZFZ52035930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97977291d77d2fec31b7a548b86295d4698fe2b2fb9fbf64c568e9a0d1379e64. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ52035932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e9e020aef50fb5d85fece47483c9ea6ab5b304f188a05d437391ff072fd5d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ52035933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa4661cd9d5f17163426e1b43bd41d236a6eda4e71a5ce7f8137274ddb98f35. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFZ52035934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf653d8fe61ef4dcb84e81e1538a1bdf0d2eaeceb12b60ed6f0b5b417f0b14d64. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ52035935.