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 0xd96cf4f37f1362af00516881376bdd49425fb80bcc812369a8c89446f040469d. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22be31b8-f62b-4505-aa79-91306d3c9206.json and https://artists.proofprofile.net/proofs/artist/22be31b8-f62b-4505-aa79-91306d3c9206.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 0x064cd6597f7d3d28a94daa264e3053d95741da5f427e74fca2c676ab196ae64b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742006682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90215f49bcdaca6054967828da88ca7b6ae915348efef44556d4f9a24645c25e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEH742006679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da4c3ec4971fbf8ab9042e53c2fd56e4c21aee89591d877e7257ad20244137. 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/DELJ82079393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca8101b482243cb381173fcae5474136a845c13f1e04bb72489e51551f0a7b0. 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/DELJ82079394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3161e3b69fbcabd559e181a9d089f81cfa9b92f67af5046e66eb9b32c18a8ad3. 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/DELJ81971149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b9c7e9c7f75191c9e1b895c3a667f1fe1f3a4adfb48f21ee68fd47b5684c16. 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/DELJ82079395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89ae43beb96af7d1cc61c97a9081a759cadd2e018f62da52be14f65c1eec14a. 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/DELJ82079396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1e0890a75fe3143df74c6c581ff0cc1a268144e5563a0ece75c4930bf3db72. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DELJ82079397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c827d8281d55d0051b0cd243b8e496f01abf5f759524be6f40ce67ef70e969. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DELJ82079398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd5c3e7562720f4230027db5dc27523d0b3ec966cac860794afa47948eb0a4c. 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/DELJ82075157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5660b5190e0917919ef6c8cfd6dba73b96febc763a741599b5b08b9f35fc5bb3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DELJ82079399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f8225c8aec140e8a94eb651a0f5a60adc2f171474262f7a7f812a6b039b2e3. 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/DELJ82079400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9f2ca1c4c2f6285b2f51071494789873a64be0f606add266c128e825b1b51. 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/DELJ82079401.
Geschichten aus der Unterwelt 2 (Präteritum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a74baf7f13a2edd59de5ff0260512d34e35e8e1094df491e69df75b0430481. 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/DELJ82079402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a995308b73cb1d28c5f8196b1fa69a2d2612bd1c674b26c126871615a1b115. 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/DEZC62468171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90546564400bae19d2694c4a99dcfec6fb80cb2cbb6d382cae1b59ce4782149. 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/DEZC62594868.