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 0xebd2c6613c288e666303163ac8e56464fa7bd93689478c725dc0fd94443effe4. 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/4d5bbdfd-97d3-4feb-a0a2-a6d730be0207.json and https://artists.proofprofile.net/proofs/artist/4d5bbdfd-97d3-4feb-a0a2-a6d730be0207.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 0x1578a93fb6626a6b250f12237e167c815aed4ee8093cfbc1996dd8a9eace2b25. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T12:00:52Z), 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/US7VG2376775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbb210f950f98d0f5f9d9aa0ec3036c971d104b13a3d086d878c81dc352a6db. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US7VG2376776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421f45120342a9ba829ec2989fb8b1d3726519fb3f27753a09d6aac3cc4706e. 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/QZ5AB2337365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d726cc67df4871b21ac157fb430117c18dbc1ee0e78b429d43287455ca4a7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNJY2331255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d881f7ebdf93c62ff931da3ac09f32da69f387df85e0f0a28ef33a741e82a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:52:15Z), 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/QZW9M2305934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c296d51839d395ee02e985dc47af08bb951719194e8d08f7a172f2736dafe01. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNJX2469520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e6f4979e75505a96fbb6766ff2a86fb68b109f4345313a79d979f4fa10c4f6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZNJX2469585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd5a828ae33c5b3cdc405ae8ae6150cab9f6f93432dbfac9d1023cf9d5a217. 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/US7VG2513834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0a82d75611c237adf8cab2bb763d2fc90a1e3155aff8640dcbaaeae0e1a6e. 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/QZGLM2514771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed3fcc41b3796b6f7f94c5389bdfcf1a913f9a1b2d6411db53d7928cb35df9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLM2513328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae77f74213c915e909978a37e59d48c2b518e5423e24a5d2ebe1321fb7a595. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJW2533764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda84ce77557bb2b9e4c09237b87913dfb6f08593ef33b170736f788d9e2355e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:09Z), 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/QZNJW2548600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7487a8d9c436b2515861849bbe52c7a047bb17e8eebf8bb403b66319f7f74369. 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/QZNJW2548567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ee1e1cdd3d08d766bbbdecdff50aacdcdf89aa6b1e077109923c9a072b748. 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/QZNJY2548858.