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 0xcddc797a57c627b920a06b546b0dc097c9a7197119f0936c88e070d15079c4a9. 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/df6b78ef-2703-41b9-8f6f-df7fe539a24d.json and https://artists.proofprofile.net/proofs/artist/df6b78ef-2703-41b9-8f6f-df7fe539a24d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x03dac1b5e4316c3d652d2d09ee2db658cb8cffa1115ce7d8b93971c48da3a1d5","isrc":"CA1C71900036","name":"Tommy's Intro","registered_at":"2026-06-11T15:58:50Z","spotify_id":"01ARXi5gD8TGkeSjlCbK8Z","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 0x03dac1b5e4316c3d652d2d09ee2db658cb8cffa1115ce7d8b93971c48da3a1d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/01ARXi5gD8TGkeSjlCbK8Z.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/01ARXi5gD8TGkeSjlCbK8Z.
{"copyright_id":"0x03dac1b5e4316c3d652d2d09ee2db658cb8cffa1115ce7d8b93971c48da3a1d5","isrc":"CA1C71900036","name":"Tommy's Intro","registered_at":"2026-06-11T15:58:50Z","spotify_id":"6kIVrk1WwVKMiykX5SVuRh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dac1b5e4316c3d652d2d09ee2db658cb8cffa1115ce7d8b93971c48da3a1d5. 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/6kIVrk1WwVKMiykX5SVuRh.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/6kIVrk1WwVKMiykX5SVuRh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5cfe40068901bf61c504961f7b358e3220bbd62c9743d2123f04dd0a3406af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0p07eXzptON22i7dk4lmP7.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/0p07eXzptON22i7dk4lmP7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca95092f60c882f890dc01043199bdbd3138dfcde1db223370589cb7b6a996f. 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/6ZBFJwlj6uJ1Th4m80KlSU.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/6ZBFJwlj6uJ1Th4m80KlSU.