Laughing Hyenas was an American noise rock band from Ann Arbor, Michigan, that existed from 1985 to 1995, fronted by Negative Approach vocalist John Brannon. According to AllMusic, "At first, the band
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 0x1cd86c5dc6be0e4789f02d2570c7d22dbcf7ee0310b4a6f331ad1b4e908e052d. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb5dc76d-d19b-408f-a088-06941292e43b.json and https://artists.proofprofile.net/proofs/artist/cb5dc76d-d19b-408f-a088-06941292e43b.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 0xe1f7b7b5db738a63fd4bb0a83820f098ea7f11d4f3aee02f4b8b057e267f21a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USTG38903801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb102e022f602952ebe6d0fad9b4f66b4f937125227292f4746e985928946d6. 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/USTG38903803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e773e3c2b96e1767be680503b112fd30ebc34a85e5af50bedc695369deec9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:23Z), 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/USTG39006101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f42df2a955a204a06388ea196fd88ab4dcd1e7abd254f2a8f0cce807279a2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USTG39006102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475943406b7652721003dd036824bfac681386fef02c8a549d81b315f71dc05. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USTG39006108.