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 0xb564acd251e6c19406405fd0d9191beca40d0d9cd5c8087051d4f34c3a6962bf. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79748e25-f6f2-4c1f-b4bd-eeeef46e1132.json and https://artists.proofprofile.net/proofs/artist/79748e25-f6f2-4c1f-b4bd-eeeef46e1132.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 0x7fef05fec893f48370116df52581d4f9c21fb69b809778dff923b1639ca74ff7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAX2552371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a9b28feb3b8fb7bb3061065090733f3cc20ff9ca7be7a94240b865dd839d93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:20Z), 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/QZTAX2552372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724af0c1b38aa8ff2fd21c973e185879fe85b785450c6f439b56d40e8d9e390. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAX2552373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce63852a7864591aa0d95f76d26e8e0102e450915d003514f5e101c562f97eb5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT3EY2564074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911b05d5823e6268e451cbb20a32d5fff5f672cb6333e19c9f3813fbf149544a. 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/QT3EY2564075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b06a913dd0bf2d2ad8fe95aadfd4608e32fef2dcff6ef265ab38f65b129136. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3EY2564076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce63852a7864591aa0d95f76d26e8e0102e450915d003514f5e101c562f97eb5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EY2564074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911b05d5823e6268e451cbb20a32d5fff5f672cb6333e19c9f3813fbf149544a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EY2564075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b06a913dd0bf2d2ad8fe95aadfd4608e32fef2dcff6ef265ab38f65b129136. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3EY2564076.