Fosco may refer to: Fosco Becattini, an Italian football player and coach Fosco Maraini, an Italian photographer Fosco Giachetti, an Italian actor Fosco Risorti, a retired Italian professional footba
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad51b61773e1701a22be1e0345b0aea3757c2293ec6893418f7643e9c1ffcb. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/453a65ef-b2a0-4fcd-ac05-0efe97283c6a.json and https://artists.proofprofile.net/proofs/artist/453a65ef-b2a0-4fcd-ac05-0efe97283c6a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19daf354efa635777f0b6b870a9ec934874aed0b077aa97fe58d2e4037bc5383. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NLYK92500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb37c7298b1b740ae2fec472ff202382777a50816449b54b9f1be6b0f491aa3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/NLYK92500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd79a923f16c2daa4dc32d984329979aac3e81979c3f7c5f55ee6111d63f04. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLYK92500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f28ea1aff3421fd1b56eaf6492aaddc1e28b6f4e6673a408f73c3752e989a8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/NLYK92500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611ad696f26430acfb12d533bb1613c11394ec88cad08cf65fb618cbcc056b8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLYK92500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccbf934343a8307a8ecdbb17cc78d8d4e78526b6db552f18270d6f10f23caac. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/NLYK92500771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893f2215c1f27004b81beeb2891dd45964e6ebc7a1f176cf7b295eda9324d28. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/NLYK92500772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b78340fbfef814a6e7750de1be336ac915f43920a0ecf642ffb1213ca198a88. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NLYK92500773.