Pers may refer to: Pers, Cantal, France, a commune near Aurillac Pers, Deux-Sèvres, France, a former commune near Poitiers Pers., taxonomic author abbreviation for mycologist Christiaan Hendrik
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 0x320e6b490274fda7d229c14c3759839b11a967ff72af8828c344bdfe4bacf3b8. 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/59cfdf9f-7ca6-4d5a-844a-ecebc12e208b.json and https://artists.proofprofile.net/proofs/artist/59cfdf9f-7ca6-4d5a-844a-ecebc12e208b.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 0x1f3cf7154d016436032218dd9215b7a2fff71f9f8e6c207d4ec439651e3f5c01. 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/PLI292200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6841d5e219bb8b4bada44cd80257401839bd4f0a3fca5d8911afc54bee15a. 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/PLI292200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4126f341d1be710984238b68af85c6795c43df48ff61a6567e4a6e883dde7327. 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/PLI292200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa660227416201c366ee5045d31b3b1e71c1bfa07e8afa676b103080ac473aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI292200637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917d1636c9195b17965a1322de5e339377cb74ca0a4d24c11f78159f9d77f03d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI292200638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef5cd4be9f6645af6eec7bf2410900c82cc77da25df016da80f0670a832d83. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI292200640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54983a2bc647a1c1674e0304fcf8ba6704b6865cf0c1c5aed41883724bec3acd. 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/PLUM72400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90a54881cb3d56530e78e6f3086c2ca87a5b3cd969d81464b7f99ba8dbab4d7. 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/PLUM72400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5b6a4d68609f8f0c53a66b595b6e2bd5c59e93871051e2706d576c78f69537. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI292200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d5fa308f2d656c3208b7a1bb4db9528e55360ee4fca9ebf2343503c7344ab. 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/PLI292200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8d1495795538e2b16d0f1b4e3e46d637cd34cfc03ad2ea33bdce34ce6c1fb3. 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/PLI292400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5b6a4d68609f8f0c53a66b595b6e2bd5c59e93871051e2706d576c78f69537. 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/PLI292200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4126f341d1be710984238b68af85c6795c43df48ff61a6567e4a6e883dde7327. 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/PLI292200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3cf7154d016436032218dd9215b7a2fff71f9f8e6c207d4ec439651e3f5c01. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI292200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6334769e85a1a9adba70926b867efece736e5d90be25d82ffdb2e2d09034657. 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/PLI292200681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347578f8da5691db3a71b570035874c383627cd70833426295be0634982d839. 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/PLI292200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6841d5e219bb8b4bada44cd80257401839bd4f0a3fca5d8911afc54bee15a. 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/PLI292200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce0aa14e4b8ea5c635e600f6d3aa372e5e5c742ff9d2167ab008fd769b1c7d. 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/PLI292200684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b11f8fa9f7d5d997f316486c2d8617a66755ec40b4280a9dfc0ad5849558cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI292200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf242a889e6bb99bf440226f26ede3aac7eb4813a52c0ffb81f99fe1b098baca4. 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/PLI292200686.