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 0xab1a36fef8bdc026884748f7f454ec491e0d6ad37c6cd8844a2243a3c4669133. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01597d53-e574-4875-8716-447bfc705147.json and https://artists.proofprofile.net/proofs/artist/01597d53-e574-4875-8716-447bfc705147.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 0xc50412a27136a7414c0c9a716120d54417a3c58b2ad37119589fa06c2a9f8c2f. 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/USQY51434800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa77001b57dc65abd4003e0fff1e99cdf65d2f53bb10df1447446ed6af63380. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USQY51576826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627443b26c7fd6431a265a51273005172046f4e46064190411c32246a357ab73. 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/USQY51605160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639925ac523458bcb0e0c579eaee3587485475ae8c8e9007b3885854ca1c7c1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA2P1864710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380efe883610a5db26b3e68177b1ee320d5b92eb2e40f974a863a0dfc0cd59e2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA2P2003554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd0f1a93f3ebaaf8dfb281b25d3bccf0cfa32081e6ef92c831a91ef207eddc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USA2P2003555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be064b2a47a781857fb3c0c385ba8e7d6c7068b89c800635b58ecf0b190363b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USA2P1963152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8b08726ed55b0b19244a3242f9a9cf8cce8aa9926e9d1b8ae3ed17222d7fd8. 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/USA2P2003556.
Gegrepen Door de Geest der Zielsontluiking
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677fcf34a7da3fdb6b17e0c5c27faf4390b1a30f42c229e1cac8f81a9f0f77ef. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USA2P2124598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197c405895260f019de7bf7c173836dae39d6ec0444916836108a32a80f0af9. 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/USA2P2124596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df3a0dd184ef3c6416fe9e077e70fa740d459d902919b46cd57e7bcc60a8611. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USA2P2124597.
De Kronieken van het Verdwenen Kasteel I: Harslo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd195b483812d58f4f0abed84c96752c979bfe68914529afefb27d25bb5570465. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEPI82211880.
De Kronieken Van Het Verdwenen Kasteel II: Nergena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fdd62daaa6038b253a2701a156fd8032af9b18bdd8db12ccec54ae56042762. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEPI82222494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7439d47c4705f4e879c6bb29d5b32e9f42cddeafa88280a26e8a6c0090b31804. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82222495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3afd0f34b08449a1b1b24876e23fbdfca9348e3314d680167cf0735ba9f75d. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/DEPI82313361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05aee02be4a96573b3d1d83d0c356b08df851a5a06f0d62901f66122f498f6d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82313362.
Kronieken Van Het Verdwenen Kasteel - III - Grunsfoort