Märvel are a rock band from Linköping, Sweden, active since 2002. The band consists of The King (John Steen) on guitar and vocals, The Burgher (Ulrik Bostedt) on bass, and The Vicar (Tony Samuelsson)
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 0xaafab6d286e1afa5ec0a73ef0352c52b3e6d753d3dca7b6ff792b090eff64872. 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/54148054-12ee-42d6-a4db-84168cb85483.json and https://artists.proofprofile.net/proofs/artist/54148054-12ee-42d6-a4db-84168cb85483.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 0x4c932888ed2e1e1440e3c9f1d8225a82bb19f746a58733307637b459d332572e. 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/SEXOO1400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78ae04652f88b3c837742f60d9f85ed441c087bfedbda2a3da8ffd82fa8aa9. 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/SEXOO1500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ebd5c2f31befff5ec4f8bc3692e5e94e76e2bb65e728ea09c4281decaa9a28. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SEXOO1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ab0544a057165b8df4200ed2075c4e5d8d1ed431b552642daddf154c541cc. 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/SE3D71702601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac89c130a38524dfde241c251273d28d9ee10a62abfd2410ec4ff1276f47921c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE3D71702603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ab0544a057165b8df4200ed2075c4e5d8d1ed431b552642daddf154c541cc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE3D71702601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf17eb4a0fb1d7cd0a3f3024716dd6d3458f4d093f3c46a5193c287d8555530. 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/SE3D71702609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447307e0a50a508c65ea7aa4cc2e7d60c337a6ec1e817de06a64400074f9619c. 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/SE3D71900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cecfb717087309acfec7e63a387f59f15fc8decdda5fbe19490b247f90dfb8a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE3D71900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bbf93a99e4f457c2390e2861ee20e16b430a48e93345002558af4ec8758959. 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/SE3D71900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447307e0a50a508c65ea7aa4cc2e7d60c337a6ec1e817de06a64400074f9619c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE3D71900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e95e191ab983c53cc6bc0f9e33b4d9963e0a9e8527a1f4a73df7d245d3c1fc. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/SE3D71900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7c79e6ae5b08f9142beedd3739900eb34ed08bed6f59cb24766d271c8a879a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE3D71900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06015f8cdf02f23b3664de1320b37f351bf675e9a2227deaea4f2f75783a909b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SE3D72102201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d280173414c5ff4c8b11ed940c3a2f3c0d6666c889a0ff32c7d9cfc4a0bf3ce. 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/SE3D72102204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a971430cc225e52a0ad324ff98d3b2be73185f9713f5ae62449eb1c55223b41. 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/SE3D72102205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3fe18ff636dc7be645dff0023bda34978b028143e6afd5dc0dfba093cec6e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE3D72102202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8684c100f167334ad65402d611778e9cc44e9e48bb51c217aef922b5102d38. 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/SEXOO1500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78ae04652f88b3c837742f60d9f85ed441c087bfedbda2a3da8ffd82fa8aa9. 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/SEXOO1500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba52d5c2a1ffff3e9f4c91a8e16a0378b391ba48a5e5d0f19ca76ae6f6ce3a14. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE7222500001.