Felix Riebl (born 1 May 1981) is a singer, songwriter, and composer based in Melbourne. He is the co-founder, band leader and principal songwriter of the internationally acclaimed band The Cat Empire,
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 0x7cf72868172414fe1cf4cfae9bcfd0534f94035fbc04ee8a9dcd8cbdef052e07. 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/c1e28fa6-61ce-4197-82e1-43159e50ecbf.json and https://artists.proofprofile.net/proofs/artist/c1e28fa6-61ce-4197-82e1-43159e50ecbf.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 0x4960157868349cf3213b5b0c9d0acdb4fc26d20970c3945e1213504a4bfd4e19. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUS741100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5590254347d71e016afc962dad9ecb6a6ffbef480e6295a629a318ebebb85b31. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUS741600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f54329b8c29c87d98d8ee9065ab313f78f927ce1e7316330a0ce0de3037dc0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:37Z), 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/AUS741600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b08dc2a26271cc815a63333f3f688818c62efdae0bfac4eee434ae8b9c13bc. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/AUS742100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c4503a68092907782366c733f39f0ca6dbc4ec88986fd3435a00f4b70b013. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:45:13Z), 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/AUS742100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23689d821020fec675641b78fb7acc99eafaafb1748ec14155324749d498bdd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUS741700027.