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 0xab5c44a42a72f0667009c3c7eb001a7fe3f706eeb15b1627940029529dcaa7b1. 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/f1be81df-9e4f-462f-ab1e-4b05e77e5d69.json and https://artists.proofprofile.net/proofs/artist/f1be81df-9e4f-462f-ab1e-4b05e77e5d69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xc6c50202a3dfe21441eb028af972b42354c618eb33dc0a4474811b8a22b3271a","isrc":"BRACT1605818","name":"Por Quem Cantam Os Cardeais","registered_at":"2026-06-25T12:21:52Z","spotify_id":"0BZasUUgOyEHRijRqMRDuR","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 0xc6c50202a3dfe21441eb028af972b42354c618eb33dc0a4474811b8a22b3271a. 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/0BZasUUgOyEHRijRqMRDuR.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/0BZasUUgOyEHRijRqMRDuR.
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{"copyright_id":"0x3707615ba51196f7f7bba222f039f1cee43b3ae66bb17f72465b1228736f90da","isrc":"BRUSA0300567","name":"Por Quem Cantam Os Cardeais - Ao Vivo","registered_at":"2026-06-07T15:14:24Z","spotify_id":"5gUHFee7DFiEMCrSz2LzVw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3707615ba51196f7f7bba222f039f1cee43b3ae66bb17f72465b1228736f90da. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5gUHFee7DFiEMCrSz2LzVw.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/5gUHFee7DFiEMCrSz2LzVw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f3342351e1572b00b79ba19a211cb19a15002b04153334902f723616ede4d. 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/6E1QTVQTiA0NMu7Xx9bKE1.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/6E1QTVQTiA0NMu7Xx9bKE1.
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