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 0x317a3a09c3416dd45bb84a9bf8be4a9d421c72f9054ac502053cc045cdc9b505. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91902dac-f4d0-486f-8a5e-3142889b57f8.json and https://artists.proofprofile.net/proofs/artist/91902dac-f4d0-486f-8a5e-3142889b57f8.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 0x98faa921c0a7a45a326f62185366cf588707b90659f1c02d90e381526ddba9d9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTBF2302315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945d48a975cc38d82c3a2704c896c04152653f24eea8773ab0cbf715bb5b9910. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:05:48Z), 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/QZTBF2330482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9598aa793d2c74fb1515030b8953046809438418a6ac905c71ebeee26eaa6925. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFK2303695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5924ee8472bcec69734267dbda7813fa7ade73644c5c2a07b8bd827665a96b4. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZFZ32406960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c29e0b120159aa1f7d543d37ea0872db255898a9338464cc592b4dd982cc84. 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/QZFZ72479656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da8b99217a1a2ed9c82b567d6f6dae4fea4b42f32840b55387eec7eb20b6163. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:52Z), 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/QZRP42503465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3eeea07bd78b37052e986d7dd4873dbb49e80d19d739d249460fd641f0471. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB42596304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd477f25ecb2583283ab0e6c083ab5db39d9f27d7b8bf30b3748b753de27808. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZZ772505907.