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 0x953b27471fe07d4064e937d1013a1eb457710830518e913f30ce5f5f6f856eb6. 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/00b4199b-2414-4f82-8461-e06b6f206cce.json and https://artists.proofprofile.net/proofs/artist/00b4199b-2414-4f82-8461-e06b6f206cce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prenons notre temps - Version a cappella
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 0x805bb7d6ae0ea70df6a70251798211a71614f92465383648d40607096cafaa23. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRT539700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12457efaf0cee14edc19f3bb56cef9a12e9934d4692ae2f02f8f6b4293fb7456. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRT539700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec77abefce896db096f2e5a773e3362466c0057b3025ce98c7c80f136ffa461. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FRT539700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ade9e09b39564937d1e41e1a162a86863cc69ae93e3a40538d02a7ebf0f53e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRT539700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff78679939285ed9fe03551d22a74a02bdb15455a115246be01ad6a93ab998d3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRT539700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd49d98d54623873e03d7855ff604fbb8a2cbffe94f8cb59e1ac88e6ca85a20. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/FRT539700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976a4f8d3bc0a5c68bf5258fee9bc8b083452a030e0fdc0b992c1f5ca6eaf748. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRT539700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b98b01688e3f2842892b239d1a6c09ee77ea00c14b4ead5f1c95f70ca7f79. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRT539700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c919eb319c107040226c680f23361e9fd374e9db4fa35ee39ebdc2e4a141105. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FRT539800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fcd331a22913e9e612f1e0fd1ef71fc40bacd92ff01f9c17e0a261d5930edc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:17Z), 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/FRT539800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe730e2dcc8c22775887c0947d9ede9176224aa624ae7a9c14a17394b3fc295f3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:38Z), 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/FRT532400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2119326b7b9d59c882ad2fe9059f3476f39fbaae9012f59dc3fa68f426a647f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRT539900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b8dff176e03c1fa2789c228eaa2b452b3e597b05faae09b7fc806689fc170c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:14Z), 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/FRT539900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568bbfb6cd0e9bc8fae2d4c2b7d328073c0d3c2983bf314f3247812c8fd52e23. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRT539900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940e00e154034ce78cf357112a2388ed3384b838334b07eefdd7eea6241f1352. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRT539900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8c6c573371b37082f32f3dcf05d1a0b3fa047eb80700be5699a643e4410b1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRT539900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85d2bf35c984f2724e901547c24f4a6a0109a425e07e55067faecf0436f0c08. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRT539900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16a46b89c4d7d68906b7b5f761b7382f3fa03faac916ca798debe6a2916bf19. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRT539900173.