thumb|right F.S.K. (Freiwillige Selbstkontrolle, German meaning "voluntary self control") is a German band that formed in Munich in 1980. The band has been associated with avant-garde fringes of Neue
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 0xce6bb2f6cc842ac3b1c087fc3339b3c4bcc2756b89668171c463313d637b11d6. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7df5723b-fa0e-4095-8e24-89530440ec7e.json and https://artists.proofprofile.net/proofs/artist/7df5723b-fa0e-4095-8e24-89530440ec7e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Freiwillige Selbstkontrolle Ist Ein Mode & Verzweiflung Produkt
Bei Alfred (44 Exitos Populares 1980-1989)
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 0x28a2640cebe1ff5e857cbcfb3a07c8f9f0bed433a389eb857e6b32475b5f98ba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEN770800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6589c389a87383a24755176ddc02c1e0e25dd92e4cd307d7321e76c9cd411f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:39:01Z), 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/DEK591035504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd50b6c244cd29b338925cd2d900b813242bfe0cab427060200f92f92e24663. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEK591035507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf5f76b098939ce8884cfd27949656d8573738f54bf63043501f1e9b0222e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEK591035514.