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 0x6dfd868ded4bb22b10d8a819912fc9ae5becc5ef05bde40bf751871892c2cc1a. 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/0d07665e-97ba-4aa5-9b53-8b375e799494.json and https://artists.proofprofile.net/proofs/artist/0d07665e-97ba-4aa5-9b53-8b375e799494.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 0x2585803bc749b8c1a7e7dea78628298f89d54d0bc6b62860a749a983d6bc2651. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR10S1539792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071c398e4711731d74a8fc4b024927e2966475b0f578ff1f3d04e50a6dee5a9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR10S1612359.
You, Me, and Our Tommy Guns - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9db7f728a7ff38bc98ed3875f53f8b435accf4365e557bd45958c2850d8ea52. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X1694676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba63d028ef33bf7e428d28e14bea28909e708fb752dcd93cac8928faa4519f6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZES61983801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b0745e0ae6dc4ea88ad0321db9033d475a6e0a37927d420a167a868002bdde. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYW1982579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8848bdc8a822771298b2b8d342728594089d8fb3e06747042d53a020754f27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYW1982582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa4f3489d5de6a007875e8ddc3f4bc12b728b5a507d84a7f830690a5dc3dac. 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/QZFYW1982583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570b761dbd1b26ceccf3d209906ce0ef6b6531d6dd47289daa68bab6d6b2e124. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PHS112400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ab3056f55ff71043315a6ac3223136738d09dc7219dc71edb13875eb85611. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/PHS112400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6bf78af5669b6d47af2af557d76da44f9c14300f35d7d788d8d2cf15c911fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PHS112400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070daa672f8c393d9536c3ec1d02ffbeb4a9b16fdf2c19139412d0ac2ff73dad. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PHS112400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1f9356fd5de1dcdc76b649caef95701a1b626281cc2a68e31a56f90dca8847. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PHS112500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7fa281afe1e679438199f0d5cdc0f3938c7d57e7e022ec2d4e2ff433809cd2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PHS112500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79972b1a23b991889f1b327ebd8e27948f30e53e5a6a097385b7da3f857a9abd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/PHW012100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd408f811a68e45daf5ca8890993bdea05be8bea46d6860b8cf5e3061280b236. 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/PHW012100081.