PNC may refer to: Government and politics Congolese National Police, in French: Police nationale congolaise Colombian National Police, in Spanish: Policía Nacional de Colombia National Civil Polic
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 0x60fa5d097a69da60ee0e87706f07accbcc9724ebd4ca6019c45ace4b9c12d217. 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/50ceb308-cb16-4535-b886-1e9974d4856e.json and https://artists.proofprofile.net/proofs/artist/50ceb308-cb16-4535-b886-1e9974d4856e.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 0x9dbb7179076b0dacc30baf89c31af883c2adc943d83e36707a2972bc0bded944. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1495814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a6c7dd2d9df9109440669476e5241b20744bce325d737038b615e621a3d443. 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/USA2P1495815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc731012a09e18881ece0193402b070b48a4ba7d2e1d27527737a5d2024246bd5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZDI10900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809411ed9a9bb073b8f2509467b962d95e2759860e0b7d3fd1904424bfc1082c. 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/NZDI10900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a4f38c153096dae96e7e4fe944df51f44d364b3829e11fa3c03e1926d14d6. 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/NZDI11000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc454b06d88d925b75bb42de1d6b478a227b7d57ed9d578383a3b145a49c19157. 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/NZDI11000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6291023653e02dec3f76a7a3a054c5b6b0e8064d5abfdd4bdc4492b0c6bff89. 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/NZDI11000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272f29e0d9e0e53eea4930f1621470f1c8ec272df2a0d16e3465bdcfe6baf94. 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/NZAZ11200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad949ed0d1398e947190817e76c0a2b1ba7a101713a3cf55585b532302c5205. 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/NZAZ11200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4512c3b831262ab843722c66a174500b1a0ca1ee2fc4e61f248e6be227a66bbf. 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/TCABS1319145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023599a062588bd17bf61790063a5de20e5ccc06a47c1136714a74ee45681b96. 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/TCABQ1308891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c764e41c05b71374badfbe82435d8c5dc7e844831c1d7ce95bc0d6f5f485a. 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/NZDI10900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d705aca9008bf189c5bd3a66458d8e5da7b559561385217c4abc29bdd2d03. 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/NZDI00600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c74ff5e634ab666653e872f546e58856490829d88b308c70aa312e7f76f208a. 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/NZDI00600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe107551ab2cd7d4c17bd054d3f3f015e2f216c684a955b3f795be355f632dbee. 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/NZAM02401507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d6b821f6d53fcf2e033c5d2849713ff0e1ded9a67c0b4ddd9f595d98a1424. 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/NZAM01700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1a867b042bb9634d7cc5f0052629b36c5f5be59a10304a0f5bcc974e72bc4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZKT01300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92339e7036b1ea31e8f942c977adb2b5880a566d5eeebfaafede69ea2753beaf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZKT01100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7e62ab5ea5bcc00311ef68e03bfdb486dfd0d3bf3921dc576af030cd06ce9. 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/NZKT01300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61d44dfb4318b20dcba107567707916a45c5da39b17403006d2d83fdf5150cc. 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/NZKT00600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151e7654060d7c41d67b8d8c76df23a4aa7d53be55594081805def05843393e6. 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/NZKT00600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dc92e5bf120df9930a4aae77aed886fe625a833722f27f76e3c6704ad45698. 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/NZKT00600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d8d7c07e31df51afaadf8ad32b81e430bb61ce4a05213171b68d6c6b14728. 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/NZKT00600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041f067638aff6a9076407f6a26381af4312f69aa48f4b3004c0d88649e5dad2. 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/NZKT00900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a248d0c659e9065c79bcaea5689cde25f4c5b74792371dc2782706e0080970. 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/NZKT01000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719f3fc4ad0d14e9a974a48849b03e25cdb988d119c62959dd55801b152c04b. 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/NZDI00700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929f79375d41f55b62569137a5d83e24538c3008834e9d64a8accd8a5d090c4d. 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/NZDI00700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d24fb8ce56317c2dd3c8ee227609c50772580579e8246af62cb7136fbdf224f. 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/NZDI00700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda5686831263181b230f4385007cdd235e925afc5f45520e9e1fe85ae594e0. 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/NZDI00700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90353a491b22ded8181a9d54726553967f59db9009766d0950c6a6332deee89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NZSM10800010.