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 0x56ac45b272b740c0ba05e1f00ebc52605eaf4ea5d6f907ebae35975d62b698fb. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e11ab414-89e6-4e47-8ed6-330f95a5854d.json and https://artists.proofprofile.net/proofs/artist/e11ab414-89e6-4e47-8ed6-330f95a5854d.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 0xc96d00304da22e736c8475787116a845e2663bf155b6e3717eaaea85cb777276. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:40Z), 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/QZTAS2488998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7977b7b7fdf29ed1318293a139cbf4eeb0579f32a8df9827b10db39aaac60db. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:04Z), 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/QZWFW2472292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc67bc5b83ceb3b15dab521059c45288e046e1f60dff86d14f94fd84b73b7e76. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:35:47Z), 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/QZZ7U2463279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd8c2f35a48fdb893840b6ae3215f828eda231c258092347acef2e194b355ae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB82500848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629824746add422ecab3332f847a258a3d7550232065c2d131cc18212e9bc220. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ772555847.