Cock Sparrer () is an English punk rock band formed in 1972 in the East End of London. Although they have never enjoyed commercial success, they helped pave the way for the early '80s punk scene and t
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 0xfe76cdd57d03fb14fe65d95a07d8a9050436491d2f20c95f36e2e0faf94005a9. 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/e814dc4b-f458-4c9c-b0bb-2994ba3fb9d2.json and https://artists.proofprofile.net/proofs/artist/e814dc4b-f458-4c9c-b0bb-2994ba3fb9d2.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 0x1a428855236f1beeba8bacb564f25efd16a0bc3f64560c0d68350f38cc448fb8. 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/GBPYM0730223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2333a3812cc7b149d1c2a2d6a26fbc647b38020355e0e806a44f27b98b7e9709. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBPYM0730225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e238676006b1052a8ec5c8c4ff6b3f196b413fc07c858bc95a4f9932539b0b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBPYM0730226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c7f06fb632ee11d0008c22fe0d734b407461744fb3a1dbb42feb88b9c3eca7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBPYM0730227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637378ea60209c4f42a45a516662e6ba39af7ce4669191d4a7c2383f1450e0d. 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/GBPYM0730229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596388877c27e3d462a0f4888acea5570025e52dc7313b4053ae0dd10a371585. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBPYM0730232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038a20bb2b9d5f6fabc4ae31b1f4e5c0ae6e64ffac8d7565b26d888d4564abc0. 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/GBPYM0730208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde266eea7ece12e3f12e2623d0ca219d92b63e9832e38e59b4390149eecfe637. 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/GBPYM0730212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe934bd8429dd9186bb77abcd3f5b218172f9a96ab6facb925155f2f02821b13f. 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/GBPYM0730214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa6d81a0a7d0104d7213b4263487eb3aee93ac32627e5626571e6ff7186aa1. 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/GBPYM0730216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832412a681184aafa6f4ff311a8c176617e1ec03caa6ad1b035eacca76b870c. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/GBPYM0730217.
Rumours Carry More Weight Than Fact (The Best Of Cock Sparrer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f986a56adf17b740709ad643f68ec3cea489c58a845d3111742259ba2b1c88. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBPYM0940006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef357f2030b6b9c0b922363cf062aba8ae261e1c3f3e4d476bcd8eb7321071ce. 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/GBPYM0940008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a7eab7918a4a859322ca75cd7d23eb9ffcf3501184f3425cc0fab821b48144. 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/GBPYM0940009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e20543207c52346f3b58c818b1f0a8d47cb6ad20f74a42e9ecac2cfa739865. 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/GBPYM0940010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771923097aa1d53fb97e21cbdb3008007a2fb6bd262cae817c116d45569e2ce3. 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/GBPYM0940012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04a4f8b48603da20dfb04eca9a8df5ea9be65b271a5ff1dfa410da30edfd01f. 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/GBPYM0940013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f307b70fb3a7029e27939b9002a2b255df08e1f34b80e4664cb7494bbe0586b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBPYM0940014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd242c56ec1590ca1cc13d63595cde6326c3ff4c7915b0098ca128876b4bdb41. 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/GBPYM0940015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b681a9a0c407cfec47e7117401a1fae22377e8f35d51c36171c4af3b9cdb7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBPYM0940017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f38454fdf9e35466b7d0e73a8742283788614608910c5ecd2a330ade714c4f0. 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/GBPYM0940020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb742a07850fb2ed88da07ad41b3bf72f18f34502d52e53c222fbef7b2b38d. 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/GBPYM0940021.
I Live in Marbella (Working, Pt. 3) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72072b6ecf958c93dde3b897112efb376b83473aa4bd96559bc9bbef4b2c67e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBPYM0940023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62853a0a59669272e5acadb2aa5be2567ada7ad3c72450c7245e503d7219fa1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBPYM0730032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab54deebef35873d5b7a48c2be6a246005543ca494ea682a2bb6edfc7a13a2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBPYM0710515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40390109a69603d95a98ac06e42e16dea00f07a6388f2854eac5a9d51538e8c1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBPYM0710516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb56b18135e981f00dbeda16b5e3e0133a5593484caca2ec5352d819e33bc700. 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/GBPYM0710517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff13750f49c66f72f737c403eb4665b48d6830d3bea153ecde4c78b8fb6f39fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBPYM0710518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76bafec63be5015e5035a3c7ee5b32be2e00edaf77b7967f41d3bcd7b324b42. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBPYM0710521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc91abd3cf33dfd7c09fdb75fd7ef293c7df2e86e92ec2b81964d78713439a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBKU21700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179048c82a76f1f774f6c0e53f07f6db9272a7f805f412990e60d2940302e03. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBKU21700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1723fbed324601dc543f68b0b676abe68e210c6473fac72b9d00a58f3ffb5b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBKU21700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a9888b2878a8ea0d8c5d9addadd56fca3923bfafde64298775a720e3578622. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBKU21700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732da886ef8452d9cbc7233ecd29b31701e1eb0c6da8e6e747c9ad518f7a61e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKU21700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9111dab11817fb758ce10a35fb1d701e5611439c2c261b12e3c5528adc05af. 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/GBKU21700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529f04739cf53b608634e143322b7eeb31e976e715b6f9f56435deb2eb541fa8. 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/GBKU21700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722b1699689224bf09404eaf184604550b51b49bab2b89873055eee0f8cbb71. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBKU21700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cfb1150a21dcee10112de170d0b4f0fef62fe196aaccd0e1b681c6c503718a. 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/GBKU22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d05044eff88643cee991f8ef6231c44d4063519fb7a8c30a8a1e2713c22d2e. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBKU22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa52ab0a5319e5383983657358e9d1ac579cb58d745ca8851b45429b24cab34e. 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/GBPYM1030203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5471953ee4f244079d99282a1b7979bc57ae9cbaa1bf0680f7d7ac69879ea7e. 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/GBKU22090001.