thumb|The band's logo Brothers of Metal are an eight-piece Swedish power metal band from Falun, formed in 2012. The band's visual style and lyrics are inspired by Vikings and Norse mythology, and are
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 0xd8099c3d83229ac1e7bba0155d6413173b2116497f0316f776eeae09b96d8edc. 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/721b80ef-97b9-4a44-962d-268b7410ad9f.json and https://artists.proofprofile.net/proofs/artist/721b80ef-97b9-4a44-962d-268b7410ad9f.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 0x4eb591e0fb419cd43c6952c97720ecf6be3ee94f31de4f05829ca3b520571105. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU601908440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ae6f295a461102f6ef1ecddee3a7eff2bd49ed20e7b350b52c4c6c1f12c99. 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/DEU601908441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0874d7af1c4de878a6c8e696d9e3bdc6d630603520734c876566ed5ea177b7ba. 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/DEU601908442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49781fbaea934e7b9d4fbef88101ccb19cc793d373860b892dd783664bab5d08. 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/DEU601908443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22f940c4c719263cbfae084a1ef9c1e24fe615d02d89a66e4e193f4cc04fa0c. 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/DEU601908444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2265bd753b4b1547aef006b51374ce06a7b200b887280d343e34e1db7190391c. 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/DEU601908445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9fe2cf75a90e731e35d78f33f820c2b1ad3b8ce939e49f626778ef05faa3cb. 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/DEU601908446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99478e323cf2f80e43468f5e6bd43bded66951b5513e2c36b7b4d4c86b402ae. 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/DEU601908447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9a6371f0114380770001001ea2c8c154add410c198d693b9146302f1dde394. 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/DEU601908448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522dca566fcdd10cf15a44f69fb0c0f059d88eca6c42e104d9d90bf86b25908. 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/DEU601908449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b90559823fae17e7455c24eb86be02b1614722f66729690b9332904133d7b1. 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/DEU601908450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e28687d8b578d81414424cecebcb177d6b009a668f7a6852d0f7dbe7895632. 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/DEU601908451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a535043d05056f12c5323de7cbecd193d9482a0bda9039c78d99067c4e4919f. 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/DEU601908452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff13038242fc0cb0462e02d40f6d8b1dd3818624f26ca83796b7b78b8c23e828. 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/USCGJ1733165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd08aa5be7c58de8cc06a7f0d2c2ea1f1b0b31489b83995f1b9e3a9fb88d7b. 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/USCGJ1733166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8764e2947702ea35cd2088a684e31a8f3a4016bfe6b4aa94135945461419b8. 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/USCGJ1733167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3e3a3d937ad526b338cfa6273bb8f4c5d2020c5d91fd45b54f71ef8efbfb07. 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/USCGJ1733168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b05c3f426be16f67e238067927667f509d33f90752e91b2e9fe76045f000c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1733169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938569450625e0a10e823a5cb1d221aba0d83efc476cc4ce415ea435c64be491. 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/USCGJ1733170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27460bb7b40a243120e73cc0974ed55db7a24c8cf8245ad42df6b40a756733de. 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/USCGJ1733171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6d53a9c174c434ec97a01796b97d8a1b24b200d6dc3b6dbf8a7848ec8b2a2. 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/USCGJ1733172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7710194507107ae3e0c1b7ab056658e7c80e5a402e54e1f6e1aac90e95862. 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/USCGJ1733173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98128b20a7483000b6f156e5c6938f10d4a81d317748536cbb82c574dc7f3cf3. 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/USCGJ1733174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae7e9ea54d860f754dcd954695547bd0a453336d9aeb64acb3ed0faf66642b. 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/USCGJ1733175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb12bce9a307d0c49bf2ab93b8571d05fd24acc969eb0713307d998aa0bb98e. 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/USCGJ1733176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54ff816c4d17e6784d6c2f4eee75791b7a611a63f2841ff0cbaef72afd3ccb. 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/USCGJ1733177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f7cc1bf9b3335480d2ef115be8725d0259d1cd995ce3a2985c38f75ba4ffc9. 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/USCGJ1733178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384fda4c27615f0e8066cedbe8341c8a3ecd1872ac6bbb35fbecc5a8c3f5e5eb. 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/DEU602411042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c7edf938bb3f2816ecb4a6183b4ef63339adad5fd026503841bbf8b29542d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU602210271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ba7bb6c0404205b84d403cabb8347b47b99c15524bd35e659ecb9cf06c560. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEU602210059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c7edf938bb3f2816ecb4a6183b4ef63339adad5fd026503841bbf8b29542d. 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/DEU602210271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ba7bb6c0404205b84d403cabb8347b47b99c15524bd35e659ecb9cf06c560. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU602210059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ba7bb6c0404205b84d403cabb8347b47b99c15524bd35e659ecb9cf06c560. 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/DEU602210059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522dca566fcdd10cf15a44f69fb0c0f059d88eca6c42e104d9d90bf86b25908. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU601908449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b90559823fae17e7455c24eb86be02b1614722f66729690b9332904133d7b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU601908450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99478e323cf2f80e43468f5e6bd43bded66951b5513e2c36b7b4d4c86b402ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU601908447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae7e9ea54d860f754dcd954695547bd0a453336d9aeb64acb3ed0faf66642b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGJ1733175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54ff816c4d17e6784d6c2f4eee75791b7a611a63f2841ff0cbaef72afd3ccb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ1733177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938569450625e0a10e823a5cb1d221aba0d83efc476cc4ce415ea435c64be491. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1733170.