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 0x9f949476552a5323226fe1026c54a1bc0e55aeefbaf7de766292a35dcd4c6a61. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ef6f010-cf31-402f-9a2a-16d7a6244bf4.json and https://artists.proofprofile.net/proofs/artist/6ef6f010-cf31-402f-9a2a-16d7a6244bf4.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 0xd7047e40c6d274ad4a190f82a8896d40f03ed811ed7af027f827bc28e84f37c2. 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/INE182322811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87147f10893d1c87dba76540076c743855c03b4b688e9293f7cea7c2dc811c00. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUBEC2346241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34332fcb06a7001957009b288a2d23a589bcfa94e1e6e337db438bca1bdc2a2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6P42497526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1cc9685017181d1e951f115d0860213fc37efc9a0c894dfa9aac7abf60e55. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:58Z), 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/QMDA72452186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b1cf213a207ffb67ed93788d3819c528ad39984152d387cfc7c89b065f8ed9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM4TX2559038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08216a8277d1051ace985dadb0a54f0dcf6b00f9b061360200619a05c11cc4de. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:34:35Z), 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/QMBZ92551801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb978de140ec8bd58302a5d364d0a2237df69e081c611dc40208a7830dd18f701. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:12Z), 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/QMDA72553712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7943cfadf954918a76df6431c049a398ccecb4f9fea7a535876e05cf7a17bd. 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/QMFMF2512967.