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 0x63d47a0da5e301d7b6519aae34ad3998e33f3094cdc5173bb300db3441fc18d6. 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/c1669f5f-8dd2-46a8-bd8c-454b2dc61fa4.json and https://artists.proofprofile.net/proofs/artist/c1669f5f-8dd2-46a8-bd8c-454b2dc61fa4.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 0x8f30fc8d552b2aeb124cb076fa1693da323ea7354ff0b87d96c873fe0b78550e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEQ121855563.
Die neue Reimgeneration (I.L.L. Will Remix 1995) / Mal sehen (Demo Beat Version)
Gleichgewicht (Demo Beat Version) / Jazzn'n In
Cro & Pontra (Demo Beat Version) / Strandgut (Demo Beat Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9383967371dcebabaa60f0ba50695a99bb22f1d35f45f2e0c851a1b8c5ed52eb. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEQ022009758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111fc7d63e267336395fa62129cb4b30f4d0deb2953b8736da646d8a45e04a80. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:01:34Z), 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/DEQ022009764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbcd71cf44caaaa49b44ab7b3bd43892b36540077e3a9f23a4e45b8184df626. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:55Z), 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/DEQ022009771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757ca0c8031b23c3a5c6e7fd6f2ef02c48d4a5163dfb91a5019e257cc0fbe2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQ022009791.
Feuchte Aussprache / Liebe und Hass Teil II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab550dfc2b9b08ca763d3d4b49893bc4dc73432153d11ac30f6499ba3ebbbbd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEQ022110978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9779347d4435c2a10b247a2cb6401b4d052d2b118773715eef73c3b534ed0e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEQ022110986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7f925aef7afee1c435a987cdcb313e396f903625401ad2b55c150391b3ff2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEQ022116664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b605661a9f078aefbdabe7a4a62554e4d37bdbaeebd145ccfa6fb309bf8bc5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:42Z), 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/DEQ022117955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bcd5f0095b7614a6a84a61464b23e36bbbc247ce3e57072a463c54aee781de. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR10S2551202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bf6e268eaf9a03543123f2a410c92b97db7d04723cc670749a762eb6ecfa8a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR10S2551205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96200b1998ebcbdfb5771f873ee07015fbecb3c39e07e4f58a8086339e4af126. 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/FR10S2551208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b97fee263226450c0100a171971d1fc2abd57289c8626217b9c961a60556ee9. 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/DEQ121753134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd6e69bf9939d8d5000ded7d44015b08b7b15f7a40d4535ce6e6c2589f0b14d. 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/DEQ121745791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e58a5fe9aa2265a00d79259ca7d3bc829310c7fbeb350017eeb54f542a012. 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/DEQ121745799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9de48822b7aa4b7aa1aa65a4f5fb8256cdfd8ba9e50ed4bdc1b41bb8f4d128. 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/DEQ121745800.