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 0xcd76058ff646961a84b3a07b9db8f1a5acecb26fad10661c9b7590a47f67dac4. 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/8cd6cdf7-d4b5-4278-a22d-3fd0a5643833.json and https://artists.proofprofile.net/proofs/artist/8cd6cdf7-d4b5-4278-a22d-3fd0a5643833.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xf765fb02242ae21c2e0f6e1797757101c09e32e8aa1334c0fb42fe24f6f69caf","isrc":"QZAKB2346042","name":"Fiery Dragon","registered_at":"2026-06-29T20:43:30Z","spotify_id":"2AqQnJSUjKLtMLz1ozd6Vg","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 0xf765fb02242ae21c2e0f6e1797757101c09e32e8aa1334c0fb42fe24f6f69caf. 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/2AqQnJSUjKLtMLz1ozd6Vg.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/2AqQnJSUjKLtMLz1ozd6Vg.
{"copyright_id":"0x177b421caef919058e1c6c9ee6dfe924cbcfdb4e9e6e1884ef854be4ccaabb5b","isrc":"QZYD92402748","name":"Fates Collide","registered_at":"2026-06-29T20:43:41Z","spotify_id":"4qeXE7cNQ40fg7KHIZyOaP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b421caef919058e1c6c9ee6dfe924cbcfdb4e9e6e1884ef854be4ccaabb5b. 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/4qeXE7cNQ40fg7KHIZyOaP.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/4qeXE7cNQ40fg7KHIZyOaP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ee8300baac521d9c6981998a5411bf14ed39fe1bb718f8b69a33870a0187d. 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/0d8OeHY6q4BleLLjuzuRd1.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/0d8OeHY6q4BleLLjuzuRd1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dd070694cefefe929b44e829e2c78a3dc729cbc46e30669d29230e44aca696. 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/4gpVnIKqTJ0l6VhUSdiKcH.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/4gpVnIKqTJ0l6VhUSdiKcH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fb3ac5819e00dfce18ccc42ab85436fc851fb18f52f73fa86186926467d7b3. 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/1T3j7LTZgmLcrjP9gnzF6P.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/1T3j7LTZgmLcrjP9gnzF6P.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe098142f24e70b80ef9947c946e8a33c672ad57984dad97855ea7f409aa7c3e1. 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/0Cyg0lN2ewBTyCXwdNpC6G.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/0Cyg0lN2ewBTyCXwdNpC6G.