Laki () or Lakagígar (, Craters of Laki) is a volcanic fissure in the western part of Vatnajökull National Park, Iceland, not far from the volcanic fissure of Eldgjá and the small village of Kirkjubæj
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xfbe12d94be0af36b9f0322d9c0e2d6b70bba9237f03f7af8cf953a768a1faf9c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb5b335f-d815-4c3d-935b-60c76ed542bc.json and https://artists.proofprofile.net/proofs/artist/fb5b335f-d815-4c3d-935b-60c76ed542bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c217b04540fdbfcd5a359125e4cf8f65932816a66e08807e65c855fa899e35f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:31:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFJ2441909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41e945534e27e1fa1542cbcbb94a8302a8b1d6fb12aa18f83d73df239d7998b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:37:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2410187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049df214da7653a919e08318b8e50f8741b05d6a20780ca6814847abcebfccb7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2412418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea5801bfc25a91cc531d1b6569a13c746ff8ad03ae8fb384321b3f421ed939e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2495276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cba9a33e28927fbcf2a72538f01f0af52fadd5ccdc310ea8436f75bb379ff3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F42436980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afad0bc0bde8a94203a3f4072ea6b16749fc7adde8aba34af32764bba07126b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72538252.