thumb|250px|A truce—not a compromise, but a chance for high-toned gentlemen to retire gracefully from their very civil declarations of warBy Thomas Nast in Harper's Weekly, February 17, 1877, p. 132.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f264d685abfe2f48079544cdb4335981b6d43427c187070fb571d1df6d76b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1a994b7-4bcb-4826-a91f-963da656e6a9.json and https://artists.proofprofile.net/proofs/artist/a1a994b7-4bcb-4826-a91f-963da656e6a9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b5a17d014b17187feebaf5f714d667534fa17d48e3b815497a6995b2708b2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IT10Z2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5749a6e370b15c94ccd472daf3b029629fe32f2a734e34558705c425e279f. 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/QZDA62356789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ced1157420d2a1eeee7ee934498d86b686b1f4a555f267690dfeb509b683d3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES82308479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb8eafbab4e491dd4719f50e8c26d27777fe4fcdf9bbf7f2840cbd23d27dc5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6F2315994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395fe300885f6425b73fd43248e802aa6e2912b57bf18020cd86d30a4cb1d00. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/IT2J82300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad43fc8c844f85ba5c3a840b16c35dec6513a6ed1a3e45bf0efd131805e73e9e. 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/IT2J82300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395fe300885f6425b73fd43248e802aa6e2912b57bf18020cd86d30a4cb1d00. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/IT2J82300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6820f6417a7283d15e9112cf39cda90fd366881d294d5ca910d3f1848d8a4a86. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IT2J82300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb779d9939cf4ea105f3c78ee6289c3eb56e5acf930c7b2badda33a9a7c35216. 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/IT2J82300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17561006d7f78ff2c11afbd6e34f0376ee7fae4e05d653bad98a9b9aa118a93. 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/IT2J82300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3cd10c58b6b3438f8f3a577d3f456c9e599d796c874715baec6c5ac4d57de. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/IT2J82300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66792ada8c99c1793972ea83c8b5c893a0055bb2433dcd21e75697e47fe99946. 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/IT2J82300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b5dc767e123ff084ebf2c1db9ab62ad5a0f3847664f229b9db36a0454cd63. 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/IT2J82300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845f9d20bbcf42b53bc3f133fc98a30b0a952d45b90a2b294884d157b415592. 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/IT2J82300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a4d4d646ccdabd1dcb9fdabae178c7035ea611e0a96e838f1fe97834359b5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/IT2J82300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eedf9414e2eac00c8da08d98ced4221a106731b538ad5ab0ba5ad2544cbfcf. 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/IT2J82300032.