Pif or PIF may refer to: Arts, media entertainment International Puppet Festival, Zagreb, Croatia P.I.F. (band), a Bulgarian rock band Pif (television host), Italian television host named Pierfr
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 0x2a5be0dd03b1e40f514efa2ef7caaf2ba8c18ed49a00573f6956e19a026a0919. 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/15552b26-d0e2-4c96-ab8e-ab36c7e25572.json and https://artists.proofprofile.net/proofs/artist/15552b26-d0e2-4c96-ab8e-ab36c7e25572.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 0xff344918d166051e4f73e66e87f3d1091e6445ef52d33508f3d746f9210d2173. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLUU2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736bb4bd60253e99c8ee2208576f293552cb4403ab683ac1c16d54e135965fae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93f76791e9f2ff3ca00cc3d4ba06c6abae53cb81fdc276a14a560800627f136. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219d37f5f4c9441ceddbbc72611448fc01530b4ef50000d6011fc701d245445. 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/USLUU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21a505ee88267303ce734b1efcc992d6734d2f03ea751b86f44d5b2e820f40b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acb381bcc98050de51db93ba0ef87b8db778bf1f04ebd8a8ac9ff8858da549b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771c188cb851dd7be7733e642c4fd4e98802ad8b36039c561db79d0ffa4d274. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0812feaaefcb621edf4cf96c009f8d92f17d3838ec3f4c1bbaa1ca3aa19e0. 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/USLUU2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52807871bfce46d90e60527b6e19bb63cc30b0edf823ea66f6545d001ca338fb. 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/USLUU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852939cf1337bd13a9e85c716e906c35c101ab8d001d8d950e3af74f23b3eb64. 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/USLUU2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ad2afeefa93de6f912b910cda06f1525601e15ca8b72299fadb7bc97edaee0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc76524b75ffc2188dae036b9e42deab915391c01b784238e42166b568b865c. 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/USLUU2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4213e85ad02ae795884db3e11f5747ef53450d1478054813fe3870acf94b040. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7852ef0ec619e0dd282799a68b6aef28bd6508cc1da5ff644fe5718804e862b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLUU2301936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a0257a72adeaf5a096816e4463b167cd1c65fe40e5ab190f9cbf431baa9e20. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLUU2301795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba03b83f49533ffa6a42e4bc0c2af0eaa8b0950d26274b880bd4d3ee3871e70c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USLUU2301635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68402da239846b6fbbd15ae38f0c9d8cf4062e2206f101e37053bcaac0bbad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2301441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85917d2d9622487c8b66a4de4ca8b74e28bbbdb8bc77a8e080a32242767161. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0d29c7ca3604288c78a1be88e1fc47c1c22c583779f0a5f3d75606150ec7c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLUU2301202.