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 0x566dde265aeed1b41e1953cf40b5780f393943b3b7169c946eae343c8d9a47f0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e5c019-e132-4c6b-8632-db7421ca6c53.json and https://artists.proofprofile.net/proofs/artist/e7e5c019-e132-4c6b-8632-db7421ca6c53.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 0x8e94d7cf5a8cda7c46b1a194ce3d81106a654df20eae9042fef683ea459a7a9c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBE2441712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c116ad9b7b5ae2b0a69ace89fdf846ebe3bb37cae3e66cf89197c7e783df41e. 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/QZTBE2441706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a904a85c9fa515b0c9e242b391aceaa12552bedce75db638228b6b09c1039ed. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:59Z), 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/QZTBE2413176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0fb104c591a1a52353aa67c67670ddf47943b422c93ee6b10d663d889061a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTBD2436398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0fb104c591a1a52353aa67c67670ddf47943b422c93ee6b10d663d889061a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTBD2436398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0fb104c591a1a52353aa67c67670ddf47943b422c93ee6b10d663d889061a. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTBD2436398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318af2ed8a1342b6f60025e2ccf99182d3de113e671cf50b7e84c6a5b762f76. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZTBE2404067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec8f847acdd4267c6062f2a7aa22a3443e07c89afc6a0c8446ccd5a047afdaa. 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/QZTBE2405847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc019d7008534c179c22ca98f976fab2396e2e12544d25ce73e6fd41774684276. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:46:16Z), 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/QZDA72524212.