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 0xa3af11843877699f96bb95b4311e0c428a2cf70d0394d1bc95e5016305db94c0. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca8435d0-8648-4797-a964-286303b67a2d.json and https://artists.proofprofile.net/proofs/artist/ca8435d0-8648-4797-a964-286303b67a2d.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 0x3f9dd33dc09dc02c94c69ab284972c8bae4695b19005bbcc1102b1cc8e5ac469. 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/US7VG1956234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37365e8466e687be196dc32df50e93a21f072c280beb25652dfeafa086b7d3. 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/US7VG1956235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8aa76d452bb70f09961448ec4554fde57fc509073765f56e1628d5c19583ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG1956236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8aa76d452bb70f09961448ec4554fde57fc509073765f56e1628d5c19583ee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG1956236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee13ad595945c158d902f8533010c370381712d708f1057aaf43607e987c355. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:56Z), 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/QZHZ52146725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f829aa3e0ea85f1f7bb3322ff99c2f1fda05b5a8c6810182d2bfefb4f33ae2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNJW2493068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53321cba7582ea102b3e3d0796861dc5bc5e761a3c5d192ffd4f0a07f34bfd6a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNJW2493073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53321cba7582ea102b3e3d0796861dc5bc5e761a3c5d192ffd4f0a07f34bfd6a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:30Z), 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/QZNJW2493073.