In the Old Norse written corpus, berserkers () were Scandinavian warriors who were said to have fought in a trance-like fury, a characteristic which later gave rise to the modern English adjective ber
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 0x1994dd55ab4d30e090bf7fc911b920a8a0b78ef08c33de4cdfdf0a2ac9ec149f. 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/45e44213-d3b0-42cb-8348-97fabffb6c90.json and https://artists.proofprofile.net/proofs/artist/45e44213-d3b0-42cb-8348-97fabffb6c90.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 0xb6c91ac44c44c743674cd48c94bee261a89287d173c7beb8b9f899caa362ee81. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEYX82175677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76470c75a0275cc9eb2c91090528eacc3e8df4c0371d3f97a82f9b9a0bc23f91. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEYX82175634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3482056b0c334b9913c59f01c4e154230095ad1218f08d8e7f66706dee306c47. 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/DEDE31311112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1562869177ed733614e4b487dd234e5c484fd228ade12d61462d689fdc131b26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEDE31311114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c605ce1af3f75bde3cfc19c35bbb248936c7236f3185cee32f5d14dd9bb0e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEYX82201059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8671dd28051662cf8ac086d86447103e1f686766979313ff30d11ddf966bd79. 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/DEYX82201056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f837390a74bc6a520ae5d961f8e5d59d98290aa013a1f7473756bb63a9e62. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DEYX82201049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd878fc026410835c98a7e4cee3506684f9f633b2bb524aeccaf4e97ae9d6797e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEYX82257842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb3bf58f3d607033a21e2d51cead510ac6416e3818e9bb940e3c443f6ca31e8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEYX82182977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e74d4ff5657846fab0219a5f7884e8603fa1c22a3e06ddb63a1f1336b84635e. 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/DEYX82240425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f6f744263f57f128e2c1eec035a3fde39a935a7348e4c4f757d6de4e9c342a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DEYX82247643.