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 0x143bf0ee5f038b1470ed4989831072797dae220e3584f8cf4a2e221a5ef1f4ff. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/952b0088-f42e-4b09-bcf3-c2b50d2f9a8a.json and https://artists.proofprofile.net/proofs/artist/952b0088-f42e-4b09-bcf3-c2b50d2f9a8a.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 0xe2ad71a0fe3c7d678997d61d69f57c8110e91d10f0d9ac94bbee77b0650ad0ae. 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/GBLPF6788159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc483a1ae38e47344bade1d23678d0791a0ee79b2ca9d57bb867a2c3a95f85. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:37:34Z), 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/GBLPF6788162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfe54da30c48490da6f14a68bf4b5c41f917de6f453be7e2dd38c0618639737. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLPF6788164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f0fc6aa4672719584420dcaa5686d8f1919af0e6c11697c452cefaa91f2cb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEAR42468682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e40c748ae42d8da2027227463d35d2af3de9c5546edd2f9ec0d50c2e7969b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEAR42468170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd06a92288862437242d04ce71b904c7406e32d1f47191903243e3ab4d636dc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:37Z), 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/DEAR42468318.