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 0x4f57be6fa1504a288e3c1f0218f7ff624f39d6c77050527dfa179c328668fdbd. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d9997bb-3c24-4684-a358-e16ecdde342f.json and https://artists.proofprofile.net/proofs/artist/7d9997bb-3c24-4684-a358-e16ecdde342f.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 0xf6207f485f73e01932fee607c648ef1246ea35fe5bc8b62b805d5078475e42b0. 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/TCADA1711956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff62b9ed56bd78b93284b7049a2b452ca58f9aa533436f891598927abc6fe90. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:37Z), 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/TCADA1711958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf8cff0069612c9b63677849bec878329785708e6b3ffc71d5e60a9494d3e3. 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/TCADA1711959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e047ef358c691eaa2573cf2f5307bc857fc5f93e3a36a71f805e3d576162161. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:06Z), 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/TCADA1711961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a814ce7e5fb271e8bda758f1bb4227b880ced4303be1a7ddbabdc40638e9cbc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADH1732185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8a12f139cfed5216cee5058fdbb2db4ed120f103cb598f8bc74508aef47a6a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:53:01Z), 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/TCADH1732188.