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 0xf26739bd35e5247e4b3c64112a3569db675fc6050e827aab83cb00d78d7acdfb. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98f9dc78-ea51-4c34-8059-3c0dfaafe293.json and https://artists.proofprofile.net/proofs/artist/98f9dc78-ea51-4c34-8059-3c0dfaafe293.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 0x13749fa8d490a0ee4a907b28ab53fcdd86789b824a06cbf2977d5250792b36b8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1116860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b784f9ef4232f0f04258554ff9318baef4f07c31ef048c10442efcfc7f72c24. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USCGH1116861.
Conviction, Vol. III: The Road to Clarity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d5b8472b9bc0c9e552e5aa2b326610faeddbdb64d5d2b88a2009f90999036d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZBLM1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0da5948e395d568145214c1949ccd3384d2b3c4000e7db15652be276ba10a47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZSBR2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0da5948e395d568145214c1949ccd3384d2b3c4000e7db15652be276ba10a47. 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/QZSBR2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c270cdf98c2b07086aeb9662a7314d66e41a702f9b5ded1d7b23de8bdf8a2f. 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/QZSBR2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dcc98e928fc1a598b5630bd7c8562b2dd4feba5e30a6543b9f2550ec3fd3c9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZSBR2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b9f6edcf68af07df37b8d62e220557ec41bea1c5a4f100f2375d2ed5978530. 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/QZSBR2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d0a6c95c3833add0e02e3bd6a6ad41aceca2adcef0644a2a5ad33ed414b392. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZSBR2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f07eeed03d3fb72746f4065105fa9ea9e962880f8fb73c59a57ee76004ccd34. 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/QZSBR2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f022a15b9c69e6773b1f3cb64e68a6d63b3ea3ddad6717065c8c095803e8e. 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/QZSBR2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c768d5ff15bfa42582f3673156f83ed8aa85577dce5198c221a2e3358228b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZSBR2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d915c9e510a2c9e07a688ef7d61fc9539f55560923ab313f0d404f42c0561e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZSBR2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e83cb8f8fa280b1c4475cfd26ad528ced653b990b03fc3185a1c567a44df5a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZSBR2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed4d82b072813f52519f5bd067733d61564189122c1a99188be400cb638ba2b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZSBR2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999ffdd55ebce07f718aa2c88b47f66aebe56e6501f3fe5c8c4a37c2c87bbb34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZSBR2400025.