Pre or PRE may refer to: Places Preston railway station, UK National Rail code PRE Preston railway station, Melbourne Prince Edward station, on Hong Kong's MTR People Steve Prefontaine (1951–1975),
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 0xfd8e5daa60abef45c0b498e6376b460aa1bbc47cd5a8522d11219eb3fd047461. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e129be25-fd65-4fdb-8b6b-3a972cd50673.json and https://artists.proofprofile.net/proofs/artist/e129be25-fd65-4fdb-8b6b-3a972cd50673.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 0xdb9fc673bbc60df15626a5a47504194eeb1038ae99d6e96e846284d4fb8ccf21. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USKBH1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe03311acd58d9c240f02ca96bce42c39336c6d4c8b28679123ef0022ff0d5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USKBH1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47daa7befc531ec6112f0d832182a847a973e8664b89d7c18ac4f6cccc7cb62. 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/USKBH1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e29f0e32f63cafc70153f5011bfc54a1c7a5ae48742665ddaad3b127e77cbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0910020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141ae4c9b12f1363e7c78f8cd12c3e387e610872c090ced65015d514e766b931. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USKBH0910021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ade35ce098551d3194248b4df4b21e4b0288478cdbfdc9e951e958ce118171e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0910023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8223930f9b9e0c421425039a4b718e59954ab828c0bc01b7d4fb89f05e36855c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USKBH0910024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be1896f98d30abb07bcbbc033e7d93631535e22d7db3fcf481aa796b857e538. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0910026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05809522c1dd23856acbed8b5775b13525ef03bd0dbc46b16a1a2a36e152877. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USKBH0710543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c00fba788146fa3373b782345863ee65135e2ceee3603ca370055e5758f9b0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USKBH0710544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf99e46e5a20147809ac465401fc55c9a799323517078c241469a26d010aac4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USKBH0710545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8d1ae5fb0d9d53b78170bb68439e39af9b1da14864d6a292267b0a21ec08b9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USKBH0710546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ad1e1d5213f492f82116a9450414ac39dab472aa46c0cd4106a333d881bbcc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USKBH0710547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565741aeef65c1cd30fddbe78b3ab2c88b8bd767af725ab25d0bef8bb2cbc167. 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/USKBH0710548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea51dc7e2a742193d0d6bf39e12f9d92627be77e4dc26d220ca580b2c5e9105. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USKBH0710549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c07ac65b0af1ee419609eeb3f6757d84c6f2bca1cb6511a10cc42662749c48. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0710550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b88524bc475a6967576062c4635fe0efc3853dfaccb64d72bffaf7be01bd891. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USKBH0710551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd040ea603c73476a5a20f4a273e1590df048bc36a64795b7c1aaf992538657. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0710552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39852a9b04f998d27d6e8e1d6f5d6418ac098438045e33e248ab924fa6e48604. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USKBH0710554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c07884c1bfda33e8c0def5e34ebecaaba117dae73393535ddb543caf13e16c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKBH0710555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacfd4ee24700296245c3f629630d0022801dc1c9ab91b81132005f0c5344cc4. 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/US7VG1721377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01519c92505d930cf76ffcfc50d7df98a0223bebf4751edafc45e4b8f07048. 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/US7VG1721379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95460783d076783cfe35d8630378e58f9d8d1add856d72e40b940e589b2fb2ec. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US7VG1721389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec7cffdb6a503e627599705a8b2d59e04979d7f0a70bab95e4c71ead773a03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN71944225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09281ba9ff59cbe983d8a82d0f4a11f33728344a77a58d2398990ff16b33f18. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH0564746.
Collective Thinking (The People R the Nation)