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 0x54c8c51e4dba7cf4cddca1307b8857cc9da9663a8a11aedca2f70980ee263a27. 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/14ba6d58-36d8-409b-88cc-a138f0c5b153.json and https://artists.proofprofile.net/proofs/artist/14ba6d58-36d8-409b-88cc-a138f0c5b153.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 0xc15a339661a63e4663f0b267bb41b21d91958379e37d9bb9918e9a9073a9777c. 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/NL1AP1932054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec3fbd72689248c77ed9d945c6979ca766ab2449bda49fb2c30875b5262891. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL1AP1973002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dc921144a42a6278e6898f9ceb5dce3bb4b23c770bec4422fc28e24cfa8b33. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/NL1AP1973003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0236d506677592d70583d2cbc1eab54aa04d7862fb34b6b26a0f96b96fb790. 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/FR10S2054601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4953ccabbf4e530e70253bc649a9a4845d6bda7fffebf9d429563d18ba710d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:25:11Z), 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/FR59R2092011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a4ea196ccc2151c28a81589c511bec77ac52ddfc1781d06c2a64d9d50e111f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:05Z), 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/TCAHC2399653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf2bd1941a9e9872715655d7ad2418e65a60d245dcd7f8c2d3950e8da815ffe. 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/TCAHF2307964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a4159c1ed2667ac7114402cf881e7086e56bfc46a11ccdcb44d8b8412bc4a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJB2458503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e19f15e6929b7eee654e72ee55c78e50e0e5b61dc025bd5ab51491325c38d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82019076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be723640e6ebe257fbdc9f7406ee2abf173a0b75e17400a01893a4c004d643. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA621900489.