1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x243859698d005d3e7338b583c2eb6b64ce38b5461dded35ee75e9c6b70e0beee. 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/f9be0640-cfc9-4734-a5ec-ba1e6c7e8cf9.json and https://artists.proofprofile.net/proofs/artist/f9be0640-cfc9-4734-a5ec-ba1e6c7e8cf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x1172f06ce8d5909ad50cec9205aa05303fef1656bcdcb59bf0a0bfd6450ca10d","isrc":"QZES72407626","name":"Clare Voyant","registered_at":"2026-06-21T11:29:41Z","spotify_id":"2JEb8WzncvZYSj5sSxZji0","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1172f06ce8d5909ad50cec9205aa05303fef1656bcdcb59bf0a0bfd6450ca10d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2JEb8WzncvZYSj5sSxZji0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2JEb8WzncvZYSj5sSxZji0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d3effb022e8c0337531fcb7cb0c2fcc37b969b2bd03a3d8d267913f65387e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4LCg5OgLeusXtyxmDUCYMt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4LCg5OgLeusXtyxmDUCYMt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745ca1e0c83ecce50265edb5ff0bfa24fb7e1ac7edcd121abc6787e4292721e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6L54AIMkQdRDekYrd393gJ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6L54AIMkQdRDekYrd393gJ.
{"copyright_id":"0xd9b34ac33b7b26ac4b216a3c86fa384f68373f49d111dcbe9acfcdca4e68c7eb","isrc":"QZNWV2363888","name":"targeted individual","registered_at":"2026-06-21T08:58:31Z","spotify_id":"6ZxdR3y4994YQn0iTZvaaT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b34ac33b7b26ac4b216a3c86fa384f68373f49d111dcbe9acfcdca4e68c7eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6ZxdR3y4994YQn0iTZvaaT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6ZxdR3y4994YQn0iTZvaaT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8374f69345e484190fc8ab502e94aeef85042f269a0e03390c5c91e6935463a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6lowZuFK6myE8s3NfGQb7m.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6lowZuFK6myE8s3NfGQb7m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd81c94ddd42813042e2af5e8895c28cbc5a2e5999566cb2783670d9b8a655. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0DJRoqI3wpC7vLfc6NYsN9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0DJRoqI3wpC7vLfc6NYsN9.