Piperrak was a Spanish punk band from La Ribera (Southern Navarre and Northern La Rioja). The band started in 1990. They recorded two demos between 1990 and 1992, and two albums between 1994 and 1996,
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 0x6d752f261f6d9df5fcafddf3f3234aeb76573fdd2da7c829d65364e87a63bb15. 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/90dd82e0-0ab5-4910-9c47-c9983d2464af.json and https://artists.proofprofile.net/proofs/artist/90dd82e0-0ab5-4910-9c47-c9983d2464af.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 0x46db4464d22504b63af0ec9ad2aecaaf1ebe254659cf3ac1bbb3bdcd1bfd0cff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU4570886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5074d8cda09d50f2b88d7bff456ec17ed55e5ee674845b1d67e078c816db8a33. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBSMU4570888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6735b732a8f69c0d192c38b716a118677f1377952ca59e4a9bf6a414211eb401. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBSMU4570890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726339556601514e034ed70409213def5afad47ebfc72d7f9c8df594e3293cf2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBSMU4570893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726339556601514e034ed70409213def5afad47ebfc72d7f9c8df594e3293cf2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBSMU4570893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91d61e6f8a06dfbd04102a827b778264005736a58e81830adbdd653adf86b4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBSMU4570926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618eda2177f066839915548cbfb59fd889be9178ca8f60c3acf95ff6f761bd3b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBSMU4570928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91d61e6f8a06dfbd04102a827b778264005736a58e81830adbdd653adf86b4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBSMU4570926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22318795563cc37bf627c5c77a5029a903ac46139ff1dbf0842b7008ac00e8c9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMFME1339006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2883c3d6b2b89c95e552bc0e3c603b92e783623111941f3cf41865d0b0a3b06. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME1339007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b249e61a92a197816ae227c959198eaa8338937537609d79534d9019967651f. 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/QMFME1339008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffe1f99fffce961ce4c14b3058346a2e6db1f0539b6ee295db1c929db3b4651. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME1339009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3bf44d16d2c3a1f4d5711fce29f5985f8a1ad8c9498981f4b8152ba58187cd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMFME1339010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d092e5998ae4811630c0a1bab8d0a67354e5d7d70650eb6e97f7f825a0cddb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME1339012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2204688cb8c500076d35706233a32cee3673039babaf8e6d9e465badad09b4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFME1339015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9113f5b87298ab5889f6884035f1306b706c4d231e12c5050398e12c922be55. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMFME1339016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49a6afc3a76212953ecdba724caef760aa9743b813e3eade0020db32de4092. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QMFME1338397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63103ea23d6689a90d7097a96b8a141d98760865d46b0ecea2d1a97af6d71fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME1338409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49a6afc3a76212953ecdba724caef760aa9743b813e3eade0020db32de4092. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/QMFME1338397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31773fbb44d39e8e790ad70605f80e5997179739fcffc93123352d57b782e648. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMFME1338400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd1f6fe1cb504b8cdee185eb92c7e2c2876fa56a41304d6704fdc090f1727db. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QMFME1338401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a76b33ee42103f9b09aba805556af84fe664ced9faa47668f9ea934bd0e73c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFME1338408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78275a1fb2a89bdcba6ccd74b8a962999dd458b2ea77e4b543e46c669eb0ed52. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QMFME1338410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd70c12b7d2b6d81bba5c06f7cae047f3ef890d7413069dd0f204e0044bbc0f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBSMU4625311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1c8cb1297dc21aa8ceda9ce60706c96727451635fc701ef7e8b37d07e357b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/GBSMU4625312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07227fc6b05aa3be11ea22432ad1b196fa72596300881977ff036b204b411520. 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/GBSMU4625314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b65321254ac297d40c779d448f7553aed9c9bb0e999e935504c7ec986d4e58. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU4625318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f58f9de4191e35743f3344aaac6e93e64c1ed50be73a014562cdc7c8c27a8d3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU4625320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab80671986606222c408489085fd0cac2b5917c7845f6bdf06877996cf9d8b. 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/GBSMU4625339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593bc3938f3ff6870ca7b4920684e0e439c3c9003a543a6eb7b2e6c08a62ad61. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSMU4625340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dfc452388f05115faac0a05d862a12fc7e199fcca93bea97efb0899dc5ffc3. 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/GBSMU4625347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ea9edcb6a2df9eceab416ab72fbd9066554626d86666c2286e1de0e1b2661. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBSMU4625350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb57b1ba4bfdf962d9ddb307e18a005e7fb627710474ae19a22075e6b36394ea. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBSMU4625319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593bc3938f3ff6870ca7b4920684e0e439c3c9003a543a6eb7b2e6c08a62ad61. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBSMU4625340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8dbc0143d697d2d871c26045fe0fddf1354a28513b0d0afb3457fb7cb6f89c. 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/GBSMU4625343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe031a7c1951f19368c4627e6ea11166067b0808b00fbbf7e6da5880822f48ac9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBSMU4625344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e59d5ab22b7c19a342bc63c4173134359cc201e98a8a659addb814d7b150629. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME1338405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d9217c9f1feda77bbe333acd51eb91d4a94eab12d812965a9fe8bc602b82e. 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/QMFME1338406.