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 0xde40b4b864e127d4b270da171d619bf5ad9964e187b98ae9f92d4f37018c66ef. 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/3f8e47f6-ed5e-4a1d-9823-a60bd35e8e40.json and https://artists.proofprofile.net/proofs/artist/3f8e47f6-ed5e-4a1d-9823-a60bd35e8e40.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 0x72c70763e5b789f3cf31350ba82c4250431041e05a0898bfce86faefef8f53dc. 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/22ACfjk9zc46owFsNBvH11.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/22ACfjk9zc46owFsNBvH11.
{"copyright_id":"0x72c70763e5b789f3cf31350ba82c4250431041e05a0898bfce86faefef8f53dc","isrc":"GBKPL2292827","name":"City of Angels","registered_at":"2026-06-28T03:58:37Z","spotify_id":"1Da2hZsE9CaUM7xxEpEWyq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c70763e5b789f3cf31350ba82c4250431041e05a0898bfce86faefef8f53dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1Da2hZsE9CaUM7xxEpEWyq.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/1Da2hZsE9CaUM7xxEpEWyq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e340ee3f209be502eb07317836f513585a1205e5027929d1f6e3a0138c06d. 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/6Ssx2PGSbt4KyO82M8zOjD.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/6Ssx2PGSbt4KyO82M8zOjD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bd91a6e07a3f3a189df8a4843bc7a2eda05575cb9b418dc38759433d164a3. 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/1hLplgIIWp1Tkvh4IX8ZKQ.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/1hLplgIIWp1Tkvh4IX8ZKQ.