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 0x81311ef63f7352f01763b77b44db0469786bb9bb91409c54a1d7f1e0789ccc0c. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f6f3d5c-3e19-41ba-abe1-513649fd1247.json and https://artists.proofprofile.net/proofs/artist/7f6f3d5c-3e19-41ba-abe1-513649fd1247.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 0x840db64098864dacd62cc46a82d82b8e6ced0903c726dd64dcea81706e0247e0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:42Z), 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/DEU241079979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0c85bcf76de4ae14fd987d1a13a4bd56ef456050a3c91ccfd250f6679c0cd8. 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/DEU241079982.
Chor des Kameradschaftsbundes Frankfurt/M und großes Blasorchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bcaf2ef4c713e0a3dc5e1c20161a11979092f1439c91f6ec7d89fc793ba397. 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/DEU241079983.
Auf Der Heide Blüht Ein Kleines Blümelein (Erika)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a1b7d4621700dc2bbb98a2dccad53dc8465d7ac1f143918d4ec9f6cb1ae55c. 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/DEU241079989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54af57284656b5d173469273120358670375257f8e58e6e70441e4057b690dc. 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/DEA549712020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3bb663c2d66bd74d4b97a246431cbf18bd7d131a6ba702f3a2cf49d12fd55. 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/DEH980672720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b2e4a4109734cb0661b5da10237bf0ee56a0ac308a16a52ef100687ac97336. 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/DEH980672760.
Marsch des Yorck'schen Korps (Yorckscher Marsch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe67f366592a23f965288b14ceb124327c2116cb4c66e37e88fb06aea39f2a. 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/DEH980672780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5b3edce81a4e086687a7ffa9ce4da5f290e0fd7ac2ee502529e52d1bdf3b34. 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/DEH980672810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80475e5e05a2cd3d3e2821d9e2c50ac0e9de7315adc233a9840f90cac4766bd. 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/DEH980672820.
Hubert Wolf und seine Original Böhmerländer Musikanten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1d64749d95f0145919a7dc5268fa655f7cd2b8986693eaebe4b9cbb412bad3. 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/DEH980672840.
Das Goldene Marsch Album - Happy Marching
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2fec87d6eabc756dd8545a150466bd3ad0c61a968355ca6c8d50a3f7f1160. 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/DED819606910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3b50e91e00bb8b95754fc98a27dddbf51b488f29aa9a5e65a614fbc57dce8. 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/DED819606920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26105bcbe01704c05fa5e91d7c45491549167f3fd22b2a48ab20564d3a39d0a4. 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/DED819607000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619498c15ced1c75115bc644ddee8bd84d7372a7fc37609696978c5ca1088e5. 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/DEN120502248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4995dab4718c92b280480d5e182bb00277fc12db5e1c9ab48aaf65dd70c9b8f. 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/DEN120502147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c81516bbc331c8bf09150af0608540168a77a265611a5edadafcc3822b90f8. 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/DEN120502150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd350565588a0ee1f4721c908046d8baf8878d75a2282324a246fecce7188f9b8. 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/DEN120502151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1f7183ee991c5584deccb2b5dd875070fa0b615f2bb2d3e13289c0e780755. 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/DEN120502153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e607061c0fbda92b6163e0a3ee0ccd1ed83977bebe76da55bee16b66bef407. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEK580920279.
Auf der Heide blüht ein kleines Blümelein (Erika)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa864729334929c80b623d6a4ec89b395e02d580f2da5af847962121a9976c9c4. 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/DEU240739788.
In Treue Fest - Die Super-Hitparade Der Marschmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099bbadfbedfab1d34a5b0e4650f8035b98197928fba904be8ab518f37d52bb. 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/DEK580920268.