Regen (; Northern Bavarian: Reng) is a town in Bavaria, Germany, and the district town of the district of Regen. Geography Regen is situated on the great Regen River, located in the Bavarian Forest.
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 0xc95c64349de66e9b56754279d57da2b61422798a8bed823d192c09f57946ea59. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a16c62e4-34a0-489a-bce8-949bc9365249.json and https://artists.proofprofile.net/proofs/artist/a16c62e4-34a0-489a-bce8-949bc9365249.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 0x42466b94aeae849d7127093f20c169116034ee8578b0c9ae7164da7d79c31de9. 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/QZTB32201196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ed9f2e20e38dc8d16536615ce9d9b926361b65dc937bcc757ceedd60321506. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZFYZ2316730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9ea7c3ca13245a54c373c7d9400f4e34075e32db8ef6746b2643894e4087e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES52391797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6b08c750bf6278861452aa83f1cb9f3c8dfbd792ee419d73a1651440ec7c0d. 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/QZES92328279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83529c230d836f8d9db5ce01f21b1008452eabed3c9a59c4d321af65ebffc397. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6Q2329664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc733436ff311396abdd00843fe5349e003decefe9cdf4edae670103f03a40b. 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/QZWFM2374489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7048b7fd94f881d615e574b788407516e6b7ce08d0d9a06c4ae3cfab1fd964. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN72468024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb9534e7ae9a8750d50aa64e3e418a749dd22d48903038625b1ff10571b671f. 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/QZTAY2472214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a9a7dad5c36ffddf9b19e80473dcef85a046fb649f8661bb0bdb7b4bf2d6c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTB32487253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4e59cfa9a1c65a88333af5b297d779c0cac00272d32afa07868b10e4abdae. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZWFP2426288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2100a6cb930d0dd7c4e2d28a9e6423dd91cc7ef78fdc139848f2264f5830eed. 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/QZDA72502469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ab8a8f28798067dd94498b97ccbd36a257e11d8a78d1bb73319d09988438d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA72502544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc3480af8fe666fc70eb57330131955e8084f0016e5ec42e50dfc9883b3c3f7. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZDA72504048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa69b690928a6c19fcd278c366ee9c09cd9557f7e18564a919973c446545be5c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZDA72504049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cef96af0f104529a402c881d6bf6e6d3e5eae1ce57fdfaa5bbd81ec6bbf142. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA72504050.