PCP may refer to: Science Medicine Pharmacy Council of Pakistan Pneumocystis pneumonia, a form of pneumonia caused by the yeast-like fungus Pneumocystis jirovecii Post-coital pill, a form of em
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 0x78117c0f6115cf63f1e89730e838a52e20b4146fea89d31cc999181fc11a6972. 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/9128e1ec-20c0-4b75-83ea-3f7e397dce7b.json and https://artists.proofprofile.net/proofs/artist/9128e1ec-20c0-4b75-83ea-3f7e397dce7b.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 0x32bbb82fb15246fd8f79d6d87b2eba233fa939bd25c8932316a7a2fb36cffc4b. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/DEZ650903866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272596c3b6b107e7fc14021c1cb856ecad49c1265ae9f96eda9fde16f5da904. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEZ650903868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbb22717c2e8a908cc067204fa2bd500f18de306e49387d82d9309d548a83d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZ650903872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5f5e8216ac76994054ce9c74fe406b1b996280eda6c68b3e1c0bfd3a0d98c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZ650903873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd503cc375375fd3afe814dfea5264c79e5421e6ecfcf055f3279ca40fb24ac. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZ650903874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e6a1cd6f040fe02f9f8af7515fee2244989d574d7fadff444bad461e0eecac. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEZ650903876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc55a67034611a19ad3a99c333a4bfe2e6058a91b23e4a29636b5158a6126f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZ650903883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f504d0df13d4d05e6760415e0ddec1c1da291199dcb711696d87f5bfa0cc9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/PLE951400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf52a6ab2c1bd4fcf308543f5f7e6e4864e46915addc0efb65eab2bea92bf724. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/PLE951400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01a472a7ee38970f3543b2f8e36230f3a0f54e139a031bc6dc91be1f9a5770c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLE951400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c60ca6a0faa056f62b501f79d4ce16ec80b5748cce5dd19242043a7ffb7359. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLE951400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2693692c6798a0e925217875c89c326484baa35cb39e9227fda86b7230246e7. 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/PLE951400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e051197143d385851c20a8842b27e193c65f748d10ce1fd4c40846b3f0679a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLE951400618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fcb98170f913cea13884fd24b03a81528c1259eba89f2f7e0954ebf57504c5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PLE951400621.