Walter Frosch (19 December 1950 – 23 November 2013) was a German professional footballer who played as a defender. Career Frosch played for SV Alsenborn, 1. FC Kaiserslautern and FC St. Pauli. Refer
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 0xf85681fd82dbd0b70521174e1935c1fabbad606612c5f73e1330f3886ad8405d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02e6e795-f2a1-41e0-9318-d9ed8cb7f4ed.json and https://artists.proofprofile.net/proofs/artist/02e6e795-f2a1-41e0-9318-d9ed8cb7f4ed.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 0xfcb6ccaf17aba24307e0f89d4d7ad92226a21e8013868a1b598c331066e6d1cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5752023300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d83b2bb6405991e510e5468fe4963e54e00514c71075c139a62b169cd62883. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:22Z), 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/CHA012300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff361fd9b08045e9efb8e41a56692a2428278c9f1029b335ad61de21cd578f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:02Z), 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/CHA012400333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd59fb006fd2c3507ab36ae20f453644b29df6bb838d949c9d5bc59f016de1. 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/CHA012400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77949d07c11d47490d7dc287e7b4b4de48fed92b291951d6ca18aa933a06d3f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CHA012400455.