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 0x3a1de29a99aff3186e8781a0dcc596b1c495ad0e7531976b06c87dddbd12894d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af8d096a-16d3-4105-a46b-6854c8aa7bda.json and https://artists.proofprofile.net/proofs/artist/af8d096a-16d3-4105-a46b-6854c8aa7bda.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 0xecb33163beb99935e272d3ded2c4092a733cddca475a631ec3ddf4b8c0dfda8a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:02Z), 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/ITZU01811710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283935a4314119ab074ece3a5e5663b5de29f1c67dcd2996cea75decf48a7ea4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITO142100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f98f72077d5dc4b56a805d120f37b22cef40252fd1d304d9f4cfb01bafb7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITO142200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da41e1502d91746a4ecd2286a9b2a84363d7c3de3eb301220747cabf1647d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITO142200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c08a91a329381e1a7e3411ad9aa329a56608aeee563419345dd1fc64dc17a5b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITO142200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56b4b23ff6c8def4c9d37954ec0d6d768e5b9395f4d29ad39a267774d8cd7f9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITO142200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28419c9c06221f3cb578e975e574594fce5d3e70f1107627f252d702be3d1ae9. 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/ITO142200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5645602254c4f8b3ed47d68fefb0da03cf52c9dd54f94674c077da55f7b25c82. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITO142200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ff7257fb7c559cbe49aeffb1c808fd6a50cba9b17d476798fe7b60836315ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITO142200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8092dcc26e5a511b7f9626a96d308f69a17a8ddc8f7d076522adc0d9bd5451. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITO142200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5d89c224aaa6564c75d06d93876a33ac088dde8d3b8363e06f1f670f7efd90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITO142200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe290b7f360e8d830cdf3a940c7546f5b17d8c4f6f92da40ac7684fe91e6ba822. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITO142100092.