Diabolical Masquerade was a Swedish one-man black metal band with progressive influences. The band was formed in 1993 in Stockholm as side project of Anders Nyström (aka Blakkheim), known for his work
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 0x304dc7f2b523f19dc46f05f60aae6fa0252d712ecdf29c9a79702f2ab5d699ef. 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/62596385-9746-4bd2-a49e-d636fdaf38ae.json and https://artists.proofprofile.net/proofs/artist/62596385-9746-4bd2-a49e-d636fdaf38ae.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 0xe4e9d5fcf19d99f461c73671f5c2422207459e00bf82e653aeeb74d50e8565b3. 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/GBCQV0600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25965009eb13e783bcd413a3fd84bf800222ccea8f339ccfb4c8d174d07c5af. 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/GBCQV0600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5df405b9d5c05ed1447169be706f0a7166e5f0ba33bd5283f8e3be5043c468. 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/GBCQV0600187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31549e8597628091344bf38df001dd32ac3d963802f060f1a294529e44903c02. 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/GBCQV0600188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0545b066f04647f2115d327f0bcb0a676a6c7fe937839392244756244b0de604. 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/GBCQV0600189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df0635f384f7c0755f32500a1fa72c282df7c09a161df34f78e5f6026e25d35. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBCQV0700358.
Blackheim's Quest To Bring Back The Stolen Autumn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83692f93468674f1b89f4f40b64de2f59e4e4c9df1c4877e5bb9a959c4e52495. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBCQV0700359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040a206e001b2ee6f99102d62899547aea44683f56d22760b752766929ba049. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBCQV0700361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a839eb18be077021d6e90e5f80e528474a6eef8afed35976daf18d7b3f8d987. 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/GBCQV0700362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ffa56ff464dbed5bc6a90e29339a51c46b4959481b3c857930ffacdf1eada2. 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/GBCQV0700367.