Dark Avenger was the pseudonym of a computer virus writer from Sofia, Bulgaria. He gained considerable notoriety during the early 1990s when his viruses spread internationally. Background and origin
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 0x28668092091956da98a9a16080af486d8d7fddbb8a6feb31e7ccc97295eadb7d. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3f768f0-f1c4-42ae-8351-43fb0be4a494.json and https://artists.proofprofile.net/proofs/artist/b3f768f0-f1c4-42ae-8351-43fb0be4a494.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 0xd351e1db947d4e731047c40c0e64727ef5502e70c1427a223c58f207b139866d. 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/IT8SF1600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad445c1ded130140c9fbda40488cc1ce6045422d394988bd2f826d615f09acf8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IT8SF1600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee047e129d29ed3846d7abf00a696f37fb21060b04dbb3b8ed232e000f1dc8a. 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/IT8SF1600329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffacc3dc18f578bb14aed70ad7850a00de549aa7bfb49a0accf1c26f427e9d82. 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/IT8SF1600333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2018f7132806ed24dfbd0564a69838200a26462dc0bb0efda6ad5b30b7146. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRK3N1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8ce2aa9d5e623a76c09867c7c74735553fbe616a1ec15a433dca67cb5e549a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRK3N1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712ab813d2c5e949fa7c36fa4c2d32a225fd28f13548aff393772dd5ee321032. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRK3N1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe622ccb7386fbe36fc75000c86209c8cc8ad63880c626216af7c643a8ef8710. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRK3N1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5c193d236f226b356e86d2eeef355e821c686a814a96906ed29b1cca4786bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRK3N1300015.
Dead yet Alive (feat. Edu Falaschi, Tito Falaschi & Clarissa Moraes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22931a6668b4ce06493c57942f42dc7c7511db201e8c513c874cde17b4f18b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRK3N1300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185264f3084d821963540bd56f71aa102408c832713fd734eb0e6dcddf700bcf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRK3N1300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de08c4d3280a1f1e47aa2340d38c8f17f963b6e35bbd1c798881e0437c522de. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRK3N1300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90df7a268d5f390c46b14b8c99a849a15f2e117e8d07319d09346927fcb6829f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRK3N1300014.
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 0x33a9bc1792928646b6d58e14bdd225377ecae0d447de810e662155036e8b8c05. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRK3N1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64054ce29fa9c8934748eee11d8ec3e702bdb5597da6c857d9c088cab207f3da. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRK3N1300017.