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 0x54e0694573732efe6336c48ebf9fea88fef398ac8183f8e00a1c72e7ad31560c. 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/a0208fe3-b554-4bf5-a4ff-f268d0116b1d.json and https://artists.proofprofile.net/proofs/artist/a0208fe3-b554-4bf5-a4ff-f268d0116b1d.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 0xa3c66ddba47ff60b0e157ee37c5b78c71e5ac322463bf6354eabb58c1d0404bb. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/DEX260992133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac80874601b65fb7f69001a30523200bb886c0f738a75a477dd44d1c184ff3d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEX261800500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b206ad83d8a78461df6db477290c71b9eb7e3f95cc5cb92754b84c798dfbd1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEX261800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd2cf68bdb3f7e635011b2cd2dfac0bf06de051ab4f633df4dc93e28493790. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/DGA072187825.
Music for Marianne (Soundtrack of the Short Movie "Bettgeflüster")
Letters from nowhere. Piano book (volume three)
Letters from Nowhere - Piano Book (Volume Three)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7a7a6669e53081ad2edeac538e94d416a8ff1a1e9b0642c7c8850a9993119. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA0R2300379.
Marching people (Original Soundtrack from the Movie by Peter Marcias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f4690452d46feefd37ed1e41c2d8c48be6f8d84c2bf1ee028b9d24f79b2193. 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/QZNWQ2457863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd42b038c62eb0bb8466bb1deaf032ff9105e6fb27449808c8b9ce98338640. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZDA62518538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8573d0a95fb76be4641a39a8e2eaff0b644809dcc67ff1fbb93c1f280695027. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZES82566003.
Némos andando per mare (original soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce92fd4dd0442391c8c3d0fe1efe567b86a519ad4bfffcbe24c3821eab656e7. 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/QZTAT2502821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c07afcf379c7bc2ffbc231a8154b1fb477f4c2be401faad4f0b84a933c3f378. 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/QZTBD2597851.
Continuum (for piano, strings and electronics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3991878ab2694777385ef2d03be52b2f20d8a55b47d87d477d9d7d6e07728309. 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/QZZ7R2586360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e64b374fe06328998a3f715ee52932aa00a8be6e20b78beddd44c07ac57ab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3EX2500696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec91244728447ab45b6728bc8b9993eeb298b276c36504ace0dccd1947edcaf0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEN961901380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7cac1875e2a48febbb3fc89a04b325b72df2eb58a42cd7279387c71ed6ab3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEG931910955.