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 0x18f0caedbe78dd190ed438de95104267c951a7a6855cb459c6dab62a3ceeab4f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdeec0d8-66f4-4da1-a963-04fc92f33bdd.json and https://artists.proofprofile.net/proofs/artist/fdeec0d8-66f4-4da1-a963-04fc92f33bdd.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 0x1c3c6db0d279e707a629bbe5431c94acc5f5125312a0f2c0bd3b9866ebfde319. 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/QZNJV2361854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685eddf4104a2ed9a107e832cf53444c32afdf98ea838c60c2fcc6148c5d743. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNJV2361855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a0e740e528fd2f22c4be41de3d6c29e489dda890fb4f2804f516e26f60390. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:16Z), 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/QZNJV2361856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fa32b8ec7cd0042ee15a8858d96c714ae2249f29f7ec116bbf325863a95dab. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJV2361857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30dd3e3fe6953ac4758ecb6d4fbf144fb5b8cb6a2c2a5ac6927af9d5031c8f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJV2361858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750c27028fa5e4d3c0365bd696f6fe3690b19c9fb114176af52d3271ce4fc1bf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2361859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a54c68c3146462644dff1690de694896a1c333dd99384728f186526193dd1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJV2361860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35414c49117c003e3e197e6052a2799754b8fe3f5c116b0f12601ccf8de85875. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:57:40Z), 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/QZNJV2361863.