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 0x06c901f936af13fc3a3aff5bd499775da4d51c89c913fd0ea8832eb87c24b3b9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54c52f92-528e-400e-9a43-289b56bc3c34.json and https://artists.proofprofile.net/proofs/artist/54c52f92-528e-400e-9a43-289b56bc3c34.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 0xc1419e777be6a648bc2570906fd1489dd6d2f7cf3276160b6791e6bf3a808a49. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZK6G2591106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f827a74e5993c6f6643930c7d3aa370b55e6096be77a82e2f3261e7a47a0b80. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:13Z), 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/QZK6G2593169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaeaae24d91bc4a67c693aac72f6df2ab5e26532f6d4fc145dee1f34034ef1f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:38Z), 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/QZMEM2522569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c5f067b1335207e263b220f1d80299469ea0a988f25c154c7f0b7a24c382d. 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/QZMEM2522565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44998125bfd25b28b704ee7bdaf4f82fd0a9ee0aa1d0585995054925b73ac837. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMEM2522563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd685c7ea527f2509a8e07c5f92b1d4b63a802feaa61ba6ff1d65ccbce5d3dc. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWX2531218.