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 0xc4dcd64143c61e8ccab64c1472abc63eb07553bb46e950b97ced68ded27cf931. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fedeb60d-e2c5-4526-aaa3-38fca28a1207.json and https://artists.proofprofile.net/proofs/artist/fedeb60d-e2c5-4526-aaa3-38fca28a1207.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 0x337934fd548e1653a1c5176240e4aedb4f49278abd09dce920bb8a61789c471d. 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/QZHN92022175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d8bd21f386f115953eb616393e76d0d413fa59bfd3858712b7b08c6615792. 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/QZS7J2192633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b7c119e423ae52263d70a0cafeefe5b0423539a1639e16b9dec42d22601b70. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:24Z), 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/QMGR32194928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c95e1bbb6aad441dba7d0aad712e043e33197b8ab1dd0e47a224036651569. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMGR32283249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce8fe81a602502d91fb83650b19f40a4128811f314035d4629f7f21af4dcd9. 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/QZN882328674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd663fc1bff830a662c8cc3e824d309d6e6264df4fa2ed3f3f01a1ce0279ff1db. 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/QZYFZ2386855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b9669dbe6e5d64dfb651ef0a2cb387b57ba6d1db10393b611e54e2c55f0de. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDW2371056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4635654723cd294ca0640b55b98cda0ac7301856132750ac1a092f8f96fee8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:47Z), 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/ES71G2502590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd927ae5a65a625edcd67e168acb72f9fbfb2bc2932c777ceb77db7d2b22b2f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMBZ92543888.