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 0x222f3f5617ac8eb8e649432e2b70627ef6520466c357412abc23df95ce8b5de7. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c92892f-af27-4360-a165-9ac66e6d69f6.json and https://artists.proofprofile.net/proofs/artist/9c92892f-af27-4360-a165-9ac66e6d69f6.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 0x8f720515fae795b66d7556ba636d9f4af74751f43eb9eb160d8daeabc9f6decf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:43Z), 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/FR6V82426976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ab7df8853029f66bcc4a1083a781468876efcba2e8a740897ae9d73607e06b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR6V82426981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5879eb6dfb99071fda444f526951b9d6277db1edd0d6c4c09dc0836d8f59d5. 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/FR6V82426982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9ccc1bd52c94ce7bb035b9d440137d07ae740dc2d6ac1f035f94912c9d0d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA71312468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfe6c64941c48a20d0550c6486727664678954e675ec18ede856fae34dfd0a5. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QMDA71312469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe2e5f9ef309206da22cc2e940f33fc6716aed7b312aeb3e409303681274d6b. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMDA71312470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a480b9b2f392f4564349ef8558d5d418a971a280e3b2f46a6bc501206b908. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:05:57Z), 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/QMDA71312471.