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 0xe9ba841759905b0a04e4d3f19009339e42f8d5b969857aa234747a0e9bd56cd6. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2211a381-e5d0-4992-b3d1-d0c54572acbc.json and https://artists.proofprofile.net/proofs/artist/2211a381-e5d0-4992-b3d1-d0c54572acbc.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 0x2ef46cad518478725207e12213b2ac403ad6d3867a399a690904bbbf2bd49dbb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBRKQ2192664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e528690226f6b5e4a3999e02f86510fdcc537fc86d59986c96244d1c77eb4d8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USLZJ2023918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c862364fa7e7941aba12ae92e4940613f2c4dcd9bcf7bb183ad58f1042afec. 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/USLZJ2213256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719812c00b7add5714d37fa104b2904d614211d4fa8dd3fe6c6afd1735efd708. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ5FN2295349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c8d2dce368e452fb327e00911d2a954ffb9e2e8dfac82309064f6ef7f2cc8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USLZJ2213271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144621a92a350a84ea1f7275bdba5e768814ae95c1cd644fed49b46bcb9d816c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:56Z), 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/USLZJ2213272.
Your Phone's off the Hook, But You're Not
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7268e2d247fb2fd3a70103196f798ed9f438b8b31e836be002d752b4377907a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USLZJ2265273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13703288d8d5fe05d4933e633b736d96d40c37f2accd5b549907e7b7f6a70c7c. 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/GBRKQ2427337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0309db825d012d99af43378181cf1f14535f4ffaaf95cc5b613984ddcc4c7583. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USLZJ2487984.