thumb|Visigothic crypt of Saint Antoninus Palencia Cathedral in Spain thumb|A crypt in Wola Gułowska in Lublin Province, Poland A crypt () is a stone chamber beneath the floor of a church, above groun
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dee577044dc694fc342ff1ee0b798d8da1237fbc82a59d6258cb33c6e5f7f7. 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/8c5a8839-62a5-44de-93f7-500b1a673fcc.json and https://artists.proofprofile.net/proofs/artist/8c5a8839-62a5-44de-93f7-500b1a673fcc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94b4b174b666d08d5319ae68f782212b60434f197ca90a253f4c2d90328c82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES82209043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bf5f68b93ce14459a1503368f7186dd60eb33831eeb13c93627d224dc17836. 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/QZWFH2449155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf024b7c5db281c5b670bb97bebe04155a74f73999c704bd714a60b45b7843250. 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/TCAEO1942829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27850824afad430beac54b7d8ca1c7049aaec0b5cf556398d3d158ce4f197af. 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/TCAEI1909212.
Poppin (feat. Lil Pump, Smokepurpp & Crypt) (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdfed405423c0d45ce26403524cd3bac7fc9f66648dcbfc6843605becaabe4d. 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/QMRSZ2000957.
Blindsight Cypher UK Drill Remix - UK Drill Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8287b22caeaf2547e208c66b0ded6d06fc9649c483e8030544b5510f89333. 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/QZK6H2130472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3972ac44458a3968848d0f22740900593c2919cbd4af128f3f471820e6dd4c2e. 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/QZZEC2318323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02acaa08b1efb9078ff1d2d607dec9de465913e6a3984f2bf1319e0af14d886. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2304761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdf5e92c6afd8612cd6f729ae83db0055e45c991f342001dfcd6e108ea924ad. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES82209030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84fd212fa8f4986202641170cf59c8a45281f7ac3f0d4f3d217234ec7972dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72274240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac7a822e76ef402700e8fb80efab59223fbf6ba77e27752e9cec3f3b650081. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82209032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387bc9f0f1c7a2948add92e828b923d310d1d3218f8626329663df14db99988e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES82209033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a996b1efb735ffdfda928defaa995bf6f47f4a3d694a546c8385067de8a5c5b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES82209034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a158e726815a87c664c2607439577b84d939bb85b632cec11fcf01779e236ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82209036.