Frumpy was a German progressive rock/krautrock band based in Hamburg, which was active between 1970–1972 and 1990–1995. Formed after the break-up of folk rockers , Frumpy released four albums in 1970–
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ed8fd778763377265c0a3dd3b96b36ae77fb48d4ffb972525247b8124387f. 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/3468e139-2d86-4b64-9379-11842626f771.json and https://artists.proofprofile.net/proofs/artist/3468e139-2d86-4b64-9379-11842626f771.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89e86fcf57c73cd613cb47448aa47475e518c05c0e5b97cbd0e5f5b2c1117e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF079103640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cf9df89f3662770bfbb9607c4cbf6dad086e7f269ce3b1ad5bc97eafe57b0a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF079103690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f8625978daaa29fbbc30c66ba77f6955b4a1ea45d9ac8aae53bf6c7d7a144. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF079002560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e95798413023dd18d57189cbcf60a03eab2d1f506a726962d31d0014b8fbce. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF077203790.
Backwater Blues - Live In Germany / 1971
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15777b894b0181f725bad1ce5d064be5db1f3e559f8fa1dfdce8f775788a2c02. 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/DEF077203810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea08a1d2082aff127c038dcdb53bce847d47c3db3205ff063dd63e506dd667e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF077203820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e03bc1056c092cbb67d209939fbb12df2691c934b3ee8ef30e1b810fac474d9. 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/DEF077203830.
Take Care Of Illusion - Live In Germany / 1971
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fca7e10f5dbf71fb249d83c17ed4a6b916606770b6c6fa8a6eb446e83294da1. 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/DEF077203840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16299ab9d8e5f2e5e225fd829c297278c239bd8985b94998a2ac42daf875e3f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM70808969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4898985a4cd8c141e5dc8cd258816e5ba13a54881dcd0d4030add31c887fe6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEF077203800.
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 0xa84e5ceadd459b8560e641b8b14193be3c42efd26e15ec03e41fcd7deb98ebbd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEF077203850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de5323bacd86e0bf15a0f375913e10a3392f2b529456c0c3dedaf41108508d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEUM70808968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d99f995f9ce411ca3155a545b258e6871a6ee47ff591c8622524d3303e8af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF077202400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1523beaf327b9ae934a4fc2dfa1823fb80afdd60689b4bac8413fa2b2ca2184a. 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/DEF077202410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb9e82779a4e744be0b7dce4cd8f4581ccd965e76d49d79a1435101abd72566. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF077202420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010edaf82c81b8439f18d3bf53a524022b775a5fb4537a804a789ad13c13526f. 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/DEF077302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3d975e5b9e9ecdd733cbb5d9d3532feb79273ea609a743cd650005f5935a8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEF077202430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2822736fa3198c557227ee073a0f52ecab020d5bb9d0407ea02226d97dd221e7. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEF077202440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe928317a84844c2a26ec7745fc7fee02d8b87671953e2d0b467c267c090639e3. 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/DEF077102320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56538200e832a53321bffce1febd461c9e8ff8b09e532e26c9959aafc2ba394. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF077102330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3a419f19ceed66038e9fd79ae6a54b0ab19d39e8af422d2cb42eb08bb540a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF077102340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064c78211072f3c04ee4565110f2bb1376f8dcfecb5eb3a245f6a85f6905e00d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF077102350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3394b0f587d339d6e9d3da35a5aba8d19bf312375556117304437b4154ca24. 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/DEF077005170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c69b6b2f6bbf0642ca0d5f6a90b2177295803e60680c87b06c12e015fbbab. 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/DEF077005210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22151d229bff296290afadf8560f799b1245423c58db2cf4b7b99bed74a1c076. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF077005220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef474551acf5bd42838b766f5f1a07f908447ad6b772ab8e2991ff4976cb8334. 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/DEF077104020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef9f1d42f105dd0528a478473bc885527048dd6e1c5650ecfb2f502d3fb0341. 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/DEF077104030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a9f47e790e4d21160a0e4edf1da10c91695b99ab6f8e51375ad40d72d0f81. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEF077005180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f032b87c6bcc898862654c0b379070f5bdf691666e5a9e801a49a4082bbbe3b. 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/DEF077005190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761211c7eee15aa2913fd3fb5f087a4d83d5c5eb092fd603f837b5be969efdca. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEF077005200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bfda7a12a56094099ee1d87d4f22e178ec29761cba319b71f807370e1b4c6b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEF077005230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b2d4d4a48930600c3095bb27da29bf117432bd2bbe665ca16a18d9935a841. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEF077005240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf521c47a7153173960d4198a09613d4a316e8f3a6d1a919efefa4680b1d120cb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEF077005250.