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 0xc2c641ede0b5e060a4cec1843b17493097cbb89e14f5c9cb343e811433f710d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84b322cb-cb29-4c8c-84b8-bfd67f827f8c.json and https://artists.proofprofile.net/proofs/artist/84b322cb-cb29-4c8c-84b8-bfd67f827f8c.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 0x5f594e154aaedc93628686c92929c2ce1ab40cd651c435cb1ab7f46e7935896a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:11:18Z), 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/QMFME1553623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71a8d1be9fd85424bcec218ea12f9013466fab68f7e9135d62d2e6576169f46. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMRSZ2001526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2de5b8775522a7547b5a3afa537b3e0040e9fb8da44fb29f279f63088fedb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME1553615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd3df3fa5a9ec5efc4953f1bed4303e50553abae3576e2a64b05921b958039c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFME1553618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30374c58551dae978a4f706626410f1dbe1e3a5bb7cfea2674fb8370fb30b82d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMFME1553621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ddd1150dc5ed130789d324b2df1afa3748f59fc99b7e46a5731083568d46dd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:20Z), 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/QMFME1553622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ee5649469b5fc799b10117e071a58b9740a1d1ac3752a9be3736b998a0a8e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:02Z), 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/QMFME1553626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ed3c9a2c26ad75220fbd8378a7e9a441178b506c28d2c17983ef07048c911e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ7R41751891.