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 0x86ac3ca7243fe50aa8358d135089fb541abddecfe0cca55076afd25252b38784. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b5f9b98-27c5-4a9b-8bc5-ead641e4c5b0.json and https://artists.proofprofile.net/proofs/artist/8b5f9b98-27c5-4a9b-8bc5-ead641e4c5b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x1687522b8cad3b7cd4ee25cde5d8bf63bed9dc7cbbfbd44f23d4a8bc5993cb4b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6UbqwZGD4e3KiiVIz5EiqY.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/6UbqwZGD4e3KiiVIz5EiqY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942e04f32fed26132043c3079acd2097163ec6bce1e8727a445a766762a4b4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1h0X9tPuU9hZG8WjPVMOH9.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/1h0X9tPuU9hZG8WjPVMOH9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325e556eecdc8bdb090bd31c4231f9c14ef05468d62130062437ff9eef77e04. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3ebOjMtiTBQbny6bsbdPfY.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/3ebOjMtiTBQbny6bsbdPfY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5853312741bb8217a0e6b99248319ea8198c20ea5c2047b2ca38bf1f84badd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7E2JnF7TCC8nLVgjbAEKVh.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/7E2JnF7TCC8nLVgjbAEKVh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708496928ff767a26338c846892eb8f6e7aff2930e84a2bde28c87217751b0a6. 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/0JQYKCoio2iBQAFsQnCLDj.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/0JQYKCoio2iBQAFsQnCLDj.
{"copyright_id":"0x7ad7741d58505237bb8c9b679262def8b8edf079e0b64c0b9d60cd14b58b77ac","isrc":"FRR642500006","name":"Nouvelle Erreur","registered_at":"2026-06-08T00:58:59Z","spotify_id":"5LqMiprWjwkCJwic3cprXj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad7741d58505237bb8c9b679262def8b8edf079e0b64c0b9d60cd14b58b77ac. 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/5LqMiprWjwkCJwic3cprXj.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/5LqMiprWjwkCJwic3cprXj.