Pfirter is a surname. Notable people with the surname include: Didier Pfirter (born 1959), Swiss diplomat Markus Pfirter (born 1939), Swiss footballer Rogelio Pfirter (born 1948), Argentine diplom
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 0x064ed7f92fb27e614395f9d78a9c8f2a7fc76e2b56b3940e6f450cbd1bc1e692. 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/d0b1fc8f-6641-4e2c-b470-59ddfb8c2e07.json and https://artists.proofprofile.net/proofs/artist/d0b1fc8f-6641-4e2c-b470-59ddfb8c2e07.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 0x293d6672577d0bac6b3f588825d4d8e10fca80862fafd91ba032b655634ab5c0. 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/SE3JM1200101.
Questionable Concept of Freedom - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad1c0afe859eb603a43df2ccf331b9e56468a7533af349d62880afcfe326784. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DECY52100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75dc40f819fded49d5388d35cee9302859b8e4011f21a7f9a6eb5067c667195. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKQU2375961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00af5ebb397a099ef9c2bb841dd86eeb1c2246d778c1d5979ad6db8f2bb4b24. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLCK42402487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9620927c6b441f08c6608bb4043aaf124177e40c1a665a86a7b58a732e49a5ab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLCK42402489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e0cf70629d3f073bde8ee9755423119a00291d589d6e5cae3adb1d13b5da9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2464731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc11ef264154f1e6e2b4e2e0c33b6013b95eaa725a95617d0d6186b04b55e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2524012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eb369abc5427d3e391d9338e2c630cba112ee7655d29f97aa942e91f9e209b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU2533694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf953e88abf17d2d54ca000b104bf7ceb0cbf5e1772cd64f80b9605ef1e88016. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBKQU2537352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60bad47139b4a469522644892f196d3657da5bf0f65e6eb5cf3110eff246263. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBKQU2537355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205fbfa1a402a0511fd5c2b0bed6498771f0ce87ae9d83b39d578e33e8b4a1b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUXN22326477.