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 0x104adef797698734438c534c5a6f739657ce584aa65c9fd5e4defaca44cff495. 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/13eb25da-aba2-451e-a6e5-3c5f529acf8d.json and https://artists.proofprofile.net/proofs/artist/13eb25da-aba2-451e-a6e5-3c5f529acf8d.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 0xfd55dd32167d80b742c8d60ff58045663f4b3784c4bf988a14a34319ba2f32f9. 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/2chPhqki1MgtoB0JDzbkKY.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/2chPhqki1MgtoB0JDzbkKY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8bc6ca240917b1eb13423767073231059add779c7bfa245c273f8aec3d35c4. 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/3Y7mjv8vFf9AFgIJgSE1Ij.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/3Y7mjv8vFf9AFgIJgSE1Ij.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a89b8515238850c53ad87aa5522c5b09e546fb8178a0089855c98aae62844c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6sd8eHLp8f47Oz8Z8AdHir.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/6sd8eHLp8f47Oz8Z8AdHir.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738f5ecc146c35fbf7bd2d7a2eb5e2c1e66e4162fc821719a52cb141d123a7ea. 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/4nrMhdklAbLUkHRv1H7YkA.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/4nrMhdklAbLUkHRv1H7YkA.
{"copyright_id":"0xb55b60a70b7dc8cf27118e15f8b496225706f85d4f4aad6bbafa6784dc1dab04","isrc":"USWB12100642","name":"Vin Diesel","registered_at":"2026-06-20T20:23:22Z","spotify_id":"7vXsiPQlUlZHDf7YCyx9km","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55b60a70b7dc8cf27118e15f8b496225706f85d4f4aad6bbafa6784dc1dab04. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7vXsiPQlUlZHDf7YCyx9km.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/7vXsiPQlUlZHDf7YCyx9km.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b518fa6396a54ec11eb54c38b143be4a60f92f9845bbf87558076bfe37f506. 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/3XXNKA17HC1z09tKchbKHJ.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/3XXNKA17HC1z09tKchbKHJ.
{"copyright_id":"0x9832c3b53e0154a75f8990676d7058c82d7364fc17d13e8d0d8999c8d8d1eac0","isrc":"USWB12100643","name":"Graveyard Blues (feat. marinelli)","registered_at":"2026-06-18T07:53:59Z","spotify_id":"4IMKSXCS6M4yuQDozzPOeo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9832c3b53e0154a75f8990676d7058c82d7364fc17d13e8d0d8999c8d8d1eac0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4IMKSXCS6M4yuQDozzPOeo.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/4IMKSXCS6M4yuQDozzPOeo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659df3266a72e7823f5130379544fef9c28b2cd6f8c979512769bdb1d501ec32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Gu2TpHvDKTu7kjOT2ddct.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/5Gu2TpHvDKTu7kjOT2ddct.
Was It Something I Said (feat. Cavetown)
{"copyright_id":"0xf92d8de4f4e1dca175f077589ce17dd7f0441428f243fd831a341e0536fca695","isrc":"USWB12000845","name":"Was It Something I Said (feat. Cavetown)","registered_at":"2026-06-04T11:24:41Z","spotify_id":"4pCKJ8NFjBHSk1wGn13cab","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d8de4f4e1dca175f077589ce17dd7f0441428f243fd831a341e0536fca695. 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/4pCKJ8NFjBHSk1wGn13cab.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/4pCKJ8NFjBHSk1wGn13cab.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a605dfd998aed43577c99998c6ebea3e332b50ec01a9f52f630f78a895b8db. 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/72k6nQxk9aJnNZeFM3N28n.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/72k6nQxk9aJnNZeFM3N28n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a605dfd998aed43577c99998c6ebea3e332b50ec01a9f52f630f78a895b8db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5QcMeB3rFAzIvqjS4bHB22.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/5QcMeB3rFAzIvqjS4bHB22.
{"copyright_id":"0x4ce712885bad5ce45154763d846efd777127c10b12b9659530c0bff183b916d4","isrc":"QZNJV2561152","name":"Shade - alexrainbirdSessions","registered_at":"2026-06-06T21:35:48Z","spotify_id":"6WSWHh4fN3w1CuQTsAqF7i","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce712885bad5ce45154763d846efd777127c10b12b9659530c0bff183b916d4. 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/6WSWHh4fN3w1CuQTsAqF7i.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/6WSWHh4fN3w1CuQTsAqF7i.