Magnum Bonum was a pop group from Huddinge in Sweden, scoring several chart successes in Sweden during the 1970s and 80's. Famous songs are Skateboard (LA Run), Marie, Lover Boy, Vi vill ha mer, Hög h
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 0x05283a974ec1dcd8814f0989b8da16482c2b58290194881a1b4d2db6284cbe25. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81ec5061-b8ab-47fe-a364-d70cb4512d1f.json and https://artists.proofprofile.net/proofs/artist/81ec5061-b8ab-47fe-a364-d70cb4512d1f.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 0xa284a82f1232129b7272b1f84b6e055096869db53f141c21f913a0a8cdb74c44. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SEAZB7801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82039094d50c0f00dca52769cd4812ae29f4ca5beb4fb7a0acb4a560e5c32cb. 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/SEUM72001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34575172cf2d495cc7846c38cf32082e9003eeac4c67f35da602746d5dd1c47. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEUM72001079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4d781f2bec6e98a8bb07e3bbc352f956293abc38faa2593793c9481dc1b8c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:35:41Z), 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/SEUM72001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef49e07ae543ee287f88abea4d6a6b446716aa2a5a110f3743acd0488999a3e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEAZB8101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46877c7d55ccfcf8c38ce6f2c961e2732103dc76b81f0bc664d19913cc661bfa. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/SEUM72001166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc18f2e053d5ad3763bb4775271b69a17ea637a294dd1e0493283a59125034. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SEBFO0400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c6e0647b324ee127794e9ea580c976176d0dbe3eae187d1b0aa292f58eb17e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEUM72001167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feeaa80420bb5098c8ddabfa994466a17841874ded66d19630ed69d9e70f05a. 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/SEUM72001168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14affec63b9835f6b1beae4315c130a157cbe945a5ce5c34c6b9522e628d775c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SEUM72001170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76e56a9eb7ee8a16d77dbbefcf3b896add00b4d32ff9f9cbac0d1e32fcb1f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:48Z), 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/SEAZB7901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284a82f1232129b7272b1f84b6e055096869db53f141c21f913a0a8cdb74c44. 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/SEAZB7801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc18f2e053d5ad3763bb4775271b69a17ea637a294dd1e0493283a59125034. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SEBFO0400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284a82f1232129b7272b1f84b6e055096869db53f141c21f913a0a8cdb74c44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEAZB7801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef49e07ae543ee287f88abea4d6a6b446716aa2a5a110f3743acd0488999a3e. 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/SEAZB8101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76e56a9eb7ee8a16d77dbbefcf3b896add00b4d32ff9f9cbac0d1e32fcb1f7. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SEAZB7901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c724f58ab0c173ca199a09998c0c7a05622bfcdc27ed6bb39162fe3bada0333. 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/TCACR1694513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a10b299b8d9b90574f192f99e7af9f16405c13828deb3f3e8ed1992a10a7a18. 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/SEPQM0612946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67595faab94fe96221cdbebd1e5105e2a2955cdd0a2ebc0018391fd779e5f6b. 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/SEPQM0612942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa7febbd7c52ea4b40d1c7000233f2a153ac91d353b2df1cc1875a0170e5f1. 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/SEPQM0612943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d362fa8af1efec3e086b19eb183a86d050056beb624111db482ec6fb1a560e. 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/SEPQM0612945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff307fd2cb5afca329bbc3ea29f12b6d3be279e3f94f2f82f99329a972a7d587. 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/SEPQM0612949.