Guru Guru is a German krautrock band formed in 1968 as The Guru Guru Groove by Mani Neumeier (drums), Uli Trepte (bass) and Eddy Naegeli (guitar), later replaced by the American Jim Kennedy. After Ken
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 0x07ca799634f90e07edd2826c8fc4e2f9623b7bbec2e814a443d86d1fb505bc0b. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b52cd5fc-a615-41c8-b486-5efd5752a3c3.json and https://artists.proofprofile.net/proofs/artist/b52cd5fc-a615-41c8-b486-5efd5752a3c3.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 0xad89e3bc47be34935a03428a488e6a9592566c337117b2fa539a6bfa967e246c. 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/DED462300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed04ee6e9db1751aa44f9fb4a5e9a1393e8239f09dfebde79a9b2f2fdccb88. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DED462300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee199c33ae84b343549edddfbe031ad1bd2caae6c538cb3e4b18d9a411e482a4. 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/DED462300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc39bf99e20de5075e63f98f5ac56e42bf941cf86121a84a3ef57fe719e1bbd. 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/DED462300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22161474de2ea68ce2aebccaf674df5b0b415cc2ee58183c3992160188b21749. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DED462300189.
Rockpalast - Krautrock Legends, Vol. 2 [Live at Studio Cologne (June 4th 1976) and Harmonie Bonn (December 21st 2004)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d68de77f4a33aa1b36351baeb18e90b3b13f94c44720b3503c2e2d77a52def9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEMV91603213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab04832ee62bc1f092191653f6a531891ef0e0eb4903c55171659e0e11a1f12. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEF087302180.
Medley: Rocken mit Eduard, Something Else, Weekend, Twenty Flight Rock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16c6f1c19eae65fb71abea58c3099e34a3bdc4f4fd777b95add1a23fc704eb. 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/DEN120400615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542c79e10c0e636992668c8e24394feef582114f46d3c9be29a9167c75bfcad. 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/DEN120400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f1ca354c607cbd51060361ed1f27f5e00d09e163a3545bb4421ffcf264aa3. 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/DEN120400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e930442a350621e95a54e1789819d1a9eb9a4d35944b73274267c61d3b428. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEN120400616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837aff887c8d64aea1537c450f0d7492f8be7e0878d32c664e877a8c78cda3d. 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/DEF087202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a32176650086ad6d4fb0f57bb9b8a9d3b0d8d69fdd3b8718ecc41094de8271. 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/DEF087202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6458a204aa4045b9a71c2b8ed678b44ff74602b1694ce41711d56ba2bf7b90. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEF087202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88738a9dd77751f241da87eb4979ba2a9e9ef3866f711af2b1ed409c2063ecc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEF087202040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dd8c1c685a83294f4cefef827b3e985bb718158e8d59814ad432598d6b5cb1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6XS2002449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822436a5588d124e002b98a91b28ed54c78a7d3d8b98fd5b5d36905a14eb4eec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6XS2002450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b4110c40dbeab04fc28d67944a44ba383a107a33402c3ccb261c00236f124. 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/QM6XS2002451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec92d3cab289e756df5a87d7a80328910260864319f97b9754bc33a2cb2a273. 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/QM6XS2002452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179e90013644364c0d85a7fa9da29bb41c5991440896dea4c8908bc35e9b217. 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/QM6XS2002444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee115b84db231fc5aa00193b215d9f4911ad0fae37fa0f81a33a9d5a1934257. 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/QM6XS2002445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38bf14b3dd5944589cbaf826f7d428cef1ed79e22ff8372e06bea6a56e56f97. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6XS2002446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095de32907a942aa44422210977e9def63a2320ad1722da553e48a63690bc3c6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM6XS2002447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa133248c912f03ad7b8a3c70f782f9ab2ff00122400814b146dab852cb0c1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6XS2002448.