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 0x0e0dfa24ec9eab40ffe1a8088d4d5d21e5624277dbd41d432aee88eeec939525. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d3eb152-8610-4c8f-9e4d-d2d5ebe6f488.json and https://artists.proofprofile.net/proofs/artist/3d3eb152-8610-4c8f-9e4d-d2d5ebe6f488.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 0xe81806c768b9e401ab57004df91ac85f4c9e7ee1510bccb2d4322f2e81613d0e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TR0891780072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f1973c21226270ee60cf4d9aa247e56a4a502516a44f4cc9640ae2e4f0962. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0891780266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98148b913896f582f31d91ef0c68c3b81dfc0685c5578ad6a76ddafbf8a958. 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/TR0891780271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277aa25c08c8bf38c0a3962bbbe7f4497494ec3ff6d651447801f616f8b59376. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TR0891780275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d21d9a4ffaa621c218eadb8afc3221921ee714f78cf0c239639d9709dfe3d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR0511403207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b630f09e0b404cbecca74bc46dabf2b03dbec4d398f053ce9361f3898dfbfb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:14Z), 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/TR0511403208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03e84a863d95803d0cf28fe5ddb1c385327aec6540fbc636b6dabfaa2332381. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHN82329253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8023563812379dc00bd946ed1342f2fc9647fdcc9d8573fbaf95df94a06f448a. 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/QZTAS2385438.