thumb|Arne Kopfermann Arne Kopfermann (born August 1, 1967, in Erlangen) is a German Christian songwriter, musician, music producer and non-fiction author. Life Kopfermann grew up in Hamburg as the
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 0x1e795e3874eb8d102104d77de48d0a26e0a312ea30951019d192b03c64818104. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9623eb-ff89-46af-b56a-fb9040919cef.json and https://artists.proofprofile.net/proofs/artist/ea9623eb-ff89-46af-b56a-fb9040919cef.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 0xe2412cf4b49adac8bacb2e301476c4cec42f9e4fae8cdd38b2016b5f7c9f5fe3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEAF40900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cc5ca421a0a78f274df26a17d0c133ae7be1cbac98ada347856ab63643292d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:34:01Z), 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/DEA551431515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c5c261132cc95ab99b2e9c61ca44b58ee75ea4d0b16550e0391941f3e3a24. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:05:06Z), 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/DEA551431521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e6d5a321c3a5972cb3e1b20f9959b186620b372abd2a27b1e4d0360c6a528e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:06:44Z), 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/DEA551431522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fe7ef741fa31e2b9577d6828dee52fae8e105f03bcaa1b75dbba40ecb81744. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEA551533874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a00c794881846c1d522b410369680e514f1c664c0739f502f616a3efd612d7. 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/DEA551533875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6869c76c1d48b8f9eb45e58bc8b7249432466e22c7d994afa41fbfd1eaa31d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEA551533879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b9d0d5fb5b64c82a869a2294d8069683436ed27188c4c43a55f2171899d4b1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEA551533880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb276b37d0b316dfc0e148a029a519a410070581cfe9af8a79270d847be76cd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEA551533881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f625e13dc35c75a6d5295a20a99f235a330d5e9de4ad2d13f606cf1509a5f8. 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/DEA551534513.
Auf zu neuen Ufern (Acoustic Experience)
In deinem Frieden (Live bei SPRING 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce20e5a61cbc453a4e55d644ef12914ee8644406cedf9f4177db52c5af92443. 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/DEA552300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e46d0b37c1ba854ef30756661fbda0ee1bce1c3c58f3b52a0b43cb44d520f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEA552500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847d17c65f428788e5e58852ead66bc6a0917f9fee2be80529078f88824fcab2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEAF40300079.
Du bist Herr Kids 2: 20 Songs aus Band 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c20dce50999d47d7e078c27855f31ed1dbb278c2dd0048a428a933317493ec. 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/DEAF40200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df96b90838787ec42963d065cccd4a016e10bcc35b93b3fb70edf9813532661. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEAF40100245.
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