Perssons Pack was a Swedish music group that played folk rock. The group started in 1989 and it disbanded in March 2014. References Category:Swedish folk rock groups Category:Musical groups establis
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 0x3e74bfe463e98bd637cfda4d5216e0f8db0241c47c6afc95af831bf055d27faf. 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/4aaf2211-4c44-44cb-ab98-ffaf6b504e61.json and https://artists.proofprofile.net/proofs/artist/4aaf2211-4c44-44cb-ab98-ffaf6b504e61.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 0x2dbfc4365eb1971f353584050ece44a4e0309bd7e5110517a4742644834a8b58. 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/SE3OW1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a66fd68f9a27ba993ef8f97416b5b5c8f4f734cd197192c2dffae8ac709e58. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/SE3OW1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5de8c4db9871a5d6803b62d66d4929fb6f4b0dc65437a220b33588c82fed90. 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/SE3OW1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc465b45bb52882a94ee032ad781d3022d0abc787ef6757d9ac3eec025897bde2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE3OW1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396d215ad5f5becb25c99894587a981a533afe36c05e0ddb18f4e1676b90a19. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE3OW1300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb47d0b32f717c894a73562be9e3e65f9d560f762bbcf283344563f214f597. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE3OW1300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe77a2a54902f08e6ee03590d262c9f2d70c4e90a2307e50b3d6e735d68a8df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE3OW1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a2d67ec361951ea42ef688ade62908b72a8a37e83c59a6bee024176780ad04. 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/SE3OW1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b2677a56001eadb03ea589febc2ac9cde0e3a0a103f5d367ca6c6d9dd8e18. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/SE3OW1300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f67081d5060ee2c73c4299e69acdbd3c025919b7c20d8d521c84ef5e809abe3. 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/SE3OW1300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de84f3d183a94b9e51dca7a0f0ee153105ca48f52f95827432211d1bda3c640. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/SEAMB9155020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b02036faa454213476c06c6a6575f97c89efe965f994a04d25b93247093c6. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SEAMB0300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca628ff2536009375a27f24018cfa7d59cf64ec6c62290d2ec04e640f31f09. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SEAMB0300767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf877c1fc7a400022ad4913a33ef66109362d45b0e2724cb44299cc8dde90642c. 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/SEAMB0300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3109398f1a17c61f386a4ebb717978415ca6a959a331ad34ed41bdf2e7df9e50. 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/SEAMB0300769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12355165c4853bb6a08eee30121c8faabe525fb91a2157835a8938a5e6ecc636. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SEAMA0900082.
Han var min bäste vän (He Was a Friend of Mine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0327121ce0bdb7ed23860ae33bd6b11149331e2cd6182db353acb41f5da026. 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/SEAMB9101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb073f5399117a4d7418750b54a50aa49fc32b23e601b9ff5674999e0df378b. 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/SEAMB9101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc423babfca6026a794ef23021752cb48d7685ddbe2c86863bbc77f68e3328ecc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEAMB9101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180d2ecddf1de8f2ef5c3afc0d94166c6906487453ff4ff75542a344280f629. 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/SEAMB9101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b048954edb858650ed5c7bb43bf950081060f651f465353addf9257f888cc. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/SEAMB9101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55afc1906ce009dfbdba77e615630d6942bfa1fd3c0f0db5b7069cbe05cd41. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/SEBFO9308030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267d56bfee0e28d77b06ec63a3f3867823f50a26eb6b2af4027a5251e2d96a7. 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/SEBFO9308050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2eaf819e8a2337d82a74a0aa472d9c193178cb65c13ebcd64a40c0403f90a. 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/SEBFO9308090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40644685c5ba1a0d48ef31ee59fbb98d1050aa72003aeceeba10e78abf1c8465. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/SEBFO9414030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3910aaa2b6d58158cfd61dd608c74918dc3f9ea793d843cf12cf4d6ca5afbc3. 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/SEBFO9414040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039a6b7ea48dfddafaddb0b5a70890dedc1fcba3e198a832004cdcd7f42a199. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEBFO9414050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa861ce32757b805f285ea0a7c3174a9975ec765243ef9d393045d844714f572. 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/SEBFO9414060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17919e0d5d26c3aec5850b2fe56ec8c41f38ca2fff324398f580180e0fd0a0e8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEMDA0800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882bdd7404fccbb313146365f1ae72b01788f3c3e20b0de6057f29a1fe619e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEMDA0800604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b03bfb8aec1e106041a54fc5d78d8de4944bfd3b07383d78f9771f74d63e8d. 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/SEMDA0800608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f24e27ae605d640cc751bed8daa6b916eb795adc9e40bdf6269c50c0cd8442. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SEMDA0800609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5845cbcefe6feaf892d4ca254e24b2e3719a732025309a50b608eeafa4baa573. 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/SEAMB9119190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee9d2626f9e3bae4391c4a273e29b92f1c7df8a30ddaa8344d55b7db3a4c93. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAMB9101010.