Roland Cedermark, (23 April 1938 – 24 December 2020) was a Swedish musician (accordionist). He was born in Älvros and made his solo debut in 1976. He sold over 2 million records in Sweden. Amongst his
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 0x9159b5096c37ec5f94d5a9e1ee937075a6ea3c844133e4cc596e3bda5faed43d. 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/a0afbd23-43f0-4ba5-bd30-22113c4b5a6a.json and https://artists.proofprofile.net/proofs/artist/a0afbd23-43f0-4ba5-bd30-22113c4b5a6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Spelar Elvis och annat svängigt på sitt dragspel
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 0x681e864d8fcdc3aad515cdc233768da1e55114d968b01eb9c2be0f0e558a526c. 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/SEPQM0610575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10277143f48fd1c18e003977c74ae7d84beed301a1e8ae55fc7cb2d77adce4e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:18:16Z), 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/SEPQM0717886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7f08ce8438107adef6b24489fe15d5b79840476b6a41f9821ed6db0ccb3689. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEPQM0610446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb2cb42abe23e530276cfcbbc3fea9526d2f1eb8da8f587a2e95dbf0b13417c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/SEPQM0610492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571118de530b4087cfc36ff83d0d721f41c7c969dc5415d25beb83f16d2be9ca. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEPQM0610501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf576ae32143ce14e5aa259aa5b9152b9322e5bfe73168ba2e3091c461081d066. 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/SEPQM0610565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396eea6a7d05b4fb425f5dd1cb5c51fbf9653686ee11a6eef8c9a3b28585d67a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEPQM0610562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389f5273152cc658d53414401edd12e24acc297d61102030440da4e6a666c3f8. 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/SEPQM0610569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d1277af2d18c9de23f6e02f84ab8e3ad5b52c035bb588c40f2c81f43c401f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEAMA1001111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaa69aa3f5ab4e531fcaf32a7e7e0c4a68850465f383e511d2d974ccdf155e9. 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/SEAMA1200907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb654e0f692fa0cb0c97c2332fd9890224c5ed097c368edeec286116b57eb5b5. 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/SEPQM0610531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f8f92f598c825a226473b5a49bf7555133cda560929fe35dd5ed3f466c8925. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:32Z), 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/SEPQM0610533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef48314df8e7d5a9abfb82c9a06a761b34ea2198b1ea77405686ae05b62fbbf. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SEPQM0610534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c70c1851acc45b3f287b292c9d6101a50be3302ab6dd808710454fd27df3378. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SEPQM0610535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a785956771a86457b6ab3fe96a93d8b641dd9aae46f3d1f3ead8281c86735. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEPQM0610536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddfc089c3efb6001edf0b3bf855d9462497b1a8ce94dffe5c4b3e2499366ad0. 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/SEAMA0900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fe2bd77adfada7c558c22fc55a9dae4c14e14703b3fec18a2548a56aebfa8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:52:32Z), 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/SEAMA0900793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f7b0980e4319dd803932ae4ebada3bd831fe380a3692260da2d1151fdcc34. 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/SEAMA1001146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa330e85ce6f8167c6c7e4bdf9b8b1d637612de630de494a4a36568f7f782f187. 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/SEPQM0610574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64696955ecebfd65c31e73a94f46bb489814f2bcad83ab82431617c0b8f8b64f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:32Z), 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/SEPQM0610557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd767e16dd331f9bbec789a9f3eb53f806db13fe8f73bf3535385c215ce654b8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:16Z), 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/SEPQM0610564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c90dcc2dfdd7c4c6edad5153916310909ae86a774b6cdb177a979e66470a6. 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/SEAOF0401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c43ba0744f3e04bad23a1a090e4459ea95f87fd04caa79ea31ac4477df192. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEAOF0401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebacd928c89f0b81d4e994d056bd48eabebad0be0f88d09835942b5542aacaa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:22Z), 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/SEPQM0717250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21484e1cbdd1d3b2ac0842b391b792cf04b1d63dea7e1885041c2a693a102aa3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:48:46Z), 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/SEPQM0717263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f978183a6e50472638f393c6acf5e89e00a40f7804bad7ea66994d1553267. 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/SEPQM0717258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d39b9c18a7e08132c1c054eaaf92d7df18a30861f087f577b3ac54b9486885. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/SEPQM0717268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82747793c107b2cd52fd98d638dc0625ed4f2915548e6e4bec39840dce1828e9. 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/SEPQM0800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e511e8186d0c2258722d4a0ed06a6dd47e661ea51c907df7cc784406fb730e1. 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/SEPQM0800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921d745d8557ee7747bfd0ff752c520604e35151ed15cb63d5cf00ad5c495e8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:52:14Z), 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/SEPQM0800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb4aeea72096e500f930108afb453321596f16c337b5bb8e2dd6bcfbf02d0ec. 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/SEPQM0800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eafa1785566d4aca7997dacac17bdac5fb1156b8280531a298d04e714449b82. 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/SEPQM0800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae04be51758bd56f32424e4590547e92cd14a317c7f130fc330affd0d324dfe4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/SEPQM0800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d39b9c18a7e08132c1c054eaaf92d7df18a30861f087f577b3ac54b9486885. 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/SEPQM0717268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681e864d8fcdc3aad515cdc233768da1e55114d968b01eb9c2be0f0e558a526c. 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/SEPQM0610575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60692999000ecf93b91a354dfda3eb1c678e741a55b8f46330d05e4a5bdcf562. 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/SEPQM0613137.
Sveriges Bästa Dansband - Berts Favoriter Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3d31400ce443359149db4107c9d02446820717b867726ef0e68aee600b4b5f. 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/SEPQM0610515.
Sveriges Bästa Dansband - Berts Favoriter Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4e38316b35a57d51e7314b3a5b012eed3c9d4207aae416e8bb41959aead561. 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/SEPQM0610516.
Sveriges Bästa Dansband - Berts Favoriter Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396eea6a7d05b4fb425f5dd1cb5c51fbf9653686ee11a6eef8c9a3b28585d67a. 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/SEPQM0610562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c43ba0744f3e04bad23a1a090e4459ea95f87fd04caa79ea31ac4477df192. 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/SEAOF0401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8ff16a53a28e22e8c6d94e2d86cb7cd1d6fb447437abf9efd056366b196bd. 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/SEAOF0401090.