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 0x8cd731d42eb66826b7e324672bd5f87d9aaf4f95b08895681c68264b9644035d. 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/aedd3d8c-600f-40e4-8b18-9e79dcbb04e2.json and https://artists.proofprofile.net/proofs/artist/aedd3d8c-600f-40e4-8b18-9e79dcbb04e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x4d1b9ad7c7d5ad494fec9ff2b43c39a9f061bccc812b3e50c66061c7c8256d48","isrc":"ES94B1900015","name":"Huella (feat. Pitizion)","registered_at":"2026-06-10T02:07:55Z","spotify_id":"1gkvcsXcjmhmJY5hTTFp9c","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 0x4d1b9ad7c7d5ad494fec9ff2b43c39a9f061bccc812b3e50c66061c7c8256d48. 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/1gkvcsXcjmhmJY5hTTFp9c.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/1gkvcsXcjmhmJY5hTTFp9c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9847cbd83e24b0fcd97f5f5389ce11d98fd7d1b16e71b1a77e847ccdc28e82. 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/7Bs3UQ8zKfVa3U8vD1t1zj.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/7Bs3UQ8zKfVa3U8vD1t1zj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf850a844e33d8a233817a654b1747ef5741e5da49dfa5f63d17003e8de101. 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/1wtlilpJplViiILnRbG5SJ.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/1wtlilpJplViiILnRbG5SJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06977e8927a305711ab9717addb80e84d94e910224fe340c9814e9f29f2db9a4. 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/7Cmm6c9oeTPHW6Jgu0t4j0.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/7Cmm6c9oeTPHW6Jgu0t4j0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb002c03254100742c06d8e6b276f1e8f38ac36ddb708432ce27f88cc299f048d. 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/6bULITKD4Cz3CpTQUB0K6d.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/6bULITKD4Cz3CpTQUB0K6d.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eba7ced48fd44c6b66458e5d1791965ef6227c6bd072b323aadc198b6d0127. 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/4vghyOmcZOnwgUAyvafgSM.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/4vghyOmcZOnwgUAyvafgSM.