Fleshquartet () is a Swedish band. Despite the band's name, Fläskkvartetten is in reality a quintet consisting of an electrical string quartet plus a percussionist. The band often collaborates with vo
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 0x5b49d17342d075b9b0dce444428576682e4f7d2022cdd15cca8ea06ae8d0b2f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7ef75fd-2b8a-4cf1-9d1f-f667c256d56e.json and https://artists.proofprofile.net/proofs/artist/a7ef75fd-2b8a-4cf1-9d1f-f667c256d56e.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 0xfefaabb723149f0ff592a61a25f4b2b7a10088789d3c4aeada05963bca25dfbf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SELBD0500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3175d6ea200bf303befa3f1de96b7bd2672c43d0275c9a9e929d66c295e9736. 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/SELBD0500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c0af6eb1487232209cf422846d766afcf67350e8759e6c276aeada7084b26. 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/SELBD0500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8502d5da94d424d774cadb8ef1454978203d2bb7a9bee46b1af924c9e2c3d3d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/SELBD0500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa17aa70516bc60c7dd5256f37cb689629b56164015e4a3ecc8808fc04e26a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SELBD0500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2701493f7a5e4ae88f696b531af80ca7610d6286ad7dcc2b887fd99d672cce10. 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/SELBD0500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff915d693b9b55a04b69cc5bb3e7a0530375d2a73b7fca8317ddc585fce3e02a. 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/SELBD0500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d8e35533de9729937f8927f02b115a9a542be62f20a1fee44d0025b5396108. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SELBD0500301.
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 0x02db42d4fda59d6ae3600cd2201e85089f62f6e1bdcfbcd0c2c0c2cb85109558. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SELBD0500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6711aa728a793f50d5d5cd7cf36cd573483792a211793457357fbbec8de21b. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SELBD0500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077be5a727a84a47d9d774f49b6d3b8d595fdf82f9ae873746965711ea47310d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SELBD0500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a918b851753d5264b297b010ec9ba963ffa8fa469bff2db7c33cfcabb99e8a. 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/DEN960432901.
Balladen om herr Fredrik Åkare och den söta fröken Cecilia Lind - 2007 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bf9465f0966c960fe9f6a254c96d66a0d298ba7cb1b7c0801ea0ce18a3d13f. 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/SEAMA0700865.
Rosenblad, Rosenblad - 2007 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0407d72da0f074b48672b002b06f801359ec8474f61481543fcc910ecfda0932. 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/SEAMA0700899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb652022ddce6a5e3ef96ef83bd633c69f4850f6b1b35bc98c8445d165b743eaa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE2441300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c83c5d5586b735a745443dfc157333b989219f5bb7945a465dc1435a2bcfeb. 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/SELBD9300102.