PND may refer to: Medicine Paroxysmal nocturnal dyspnoea, a breathing disorder Post-nasal drip, from the nose Politics New Democracy Party (Portugal) (Partido da Nova Democracia) National Democratic
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 0xe45bd17c1b770e23504f39c5e808a5b8b39d4d4f5023370ed0566b2f335d0e58. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d59c1cb-3e27-4fa7-aef2-67d993b14e1a.json and https://artists.proofprofile.net/proofs/artist/3d59c1cb-3e27-4fa7-aef2-67d993b14e1a.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 0x5876a10a5b4daa7f06594d23d5e6fab9ecf0dd0e26b2a3a47fa23774571ee4f0. 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/GBSMU2319353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4196c9ecebcbb08a66018eadbfded051c81fe6ca2922835ee42767a815010335. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU2319356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f40bfdc6102166a70814d635270747fc50de80a4e610eb231ea4e342ba5f715. 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/GBSMU2319358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22f2b33cbb0fc7a4f6f4f8573679fee18c6872dcb45278bff9edb8d10c830e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU2319359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be623f0b84b3243acf409952a2bb823e8c3f01738a1288b2eee1a89f55fded. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBSMU2319363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7468f81bda7f8ada491279c5ae14477f4459894f6933b14e7df5879d45d99. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBSMU2579466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f55721df3d9e8191f6da86dfdbd7a7742ecdd38517c53aa9e405b1e330f09e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MX2218579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b36044295910e02bb4b40aa4b0f18e9b035a9df2c85c0ae56637d6de5b95486. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:57Z), 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/GX5MX2218735.