The Kings of Frog Island are an English stoner rock collective drawing from psychedelic and retro rock traditions. The Kings of Frog Island formed in Leicester, England (hence Frog Island) in 2003, as
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 0x2d21c8df0a67331dae6b9cd9ab510c97f3919eb9b33706d7adbacb22116e7c02. 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/42416585-f4e8-4b1f-81fe-e6f19cabc3e3.json and https://artists.proofprofile.net/proofs/artist/42416585-f4e8-4b1f-81fe-e6f19cabc3e3.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 0x8271898d617841cddf52492920de97520424dde5eaa5257fadd607aa5147e333. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:00:37Z), 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/USA2P1183336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33709af4f1fe89276a52c0a5453cefc6f70b22abe44113494fb7a136a0493e38. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USA2P1183407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93efbcc7e9dbe35444876bfc8995de144243cf9a8e85a528ef0ea38edbae0fb5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P1183412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f4e4b4cf97ce5c5916a89ac0ffa8fb6a4f1438c3a50c217c0dca3d6d31a59. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P1183413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf425137c828870b29575563756ba83b8d7a9c76a40b1972f641057ca9c9acdc3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q2032831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1968101539d25fe3b8f4555d9f43fc0546a66d4ceb678ca6426457a61b20ebc5. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USL4Q2032837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2b4f8a64911f7f1240dd18dfb4995609c8f4d0192b996c71c84e3fd127d5f. 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/USHM82118558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a7e5a50f06598e77488ed407f75230b06578b34115a98dfad15580f326e19. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2116615.