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 0xba023cfc28a9994968b82590c7a8c3fc7d1991f4903fadf864cae1627c4df920. 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/8839d67c-95ee-40ca-ac5f-f3ebc2b7d21f.json and https://artists.proofprofile.net/proofs/artist/8839d67c-95ee-40ca-ac5f-f3ebc2b7d21f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stich, Stich, Stärbegrüsch (feat. Greis, Roumee & Dj Rapaze)
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 0x68ce5197616335f2633e86599e583bbb7e712d0f45657d0daa0967d6d78772c7. 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/CH7811816381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cbe14d3dd257d924f480e74afb823322da754e379bc325bf6ce699321a01be. 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/CH7811816382.
Chlini Rebellion (feat. Greis, Krust & Fäntu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc9fea744323ff3ed66e43c76e7ff43db9212dca6fa99572386d5017dc381d. 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/CH7811816383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb58e40e4a2ba67c708d2592d322f5a2a1b30680cfd8f6c9f645dc92c16559d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH7811816387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1c31691591dfa08c58519a7105d42dec9ae55e862a77db1456d5f84cc763e5. 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/CH7811821293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca97a912d68beaaedbde37b421eaffb6b0fd25509a342216efaa226a681827. 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/CH7811821298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd02f6d3074c72895332577d790c9469b2f203a860012b8dfa610e6772dc1b7d. 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/CH7811821301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fee0ccb13260ca7fb60914a4e0709ef7eb6cc6e19414e25e67e6dd480ebcc8c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH7812193971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628d67f9b40a27c9c9f58e36aa77a06d5d570455e4fd04836a826fadac7b25f8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:18:52Z), 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/CH7812220360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd9f4868a3a8b2b6177e527585ba072a9ac1ebb7bc8a8a5e031cdf4fb4b662c. 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/CH7811930414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2934d253fa9639a6c64c53893c90bb75170e969ab96a05bb0c794c62aca2e88. 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/CH7811930415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1787f54c397677315a08781628317389ee47804c2941e8ea08bc5b237c89fac. 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/CH7811930416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e7a90ff5ea49be67b5c910437f72ed81f78355268e7d72c085544c0b3f93be. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CH7811930418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3f0d5c1c4e7f4443041d0436704529f634f880ed9df2b1f10cb08ec253c76a. 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/CH7811930419.