thumb|300px|Attwenger performing live in 2008. Attwenger (formed 1990) is a musical duo from Linz, Austria. The group is made up of drummer Markus Binder and button accordion player Hans-Peter Falkn
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 0x9536a67a1adadc6a7d55e43bd63d64e5da9a21f88012cde3e04531ed39f551af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d5aff44-a378-4c4a-bb8b-2f1aa5fad453.json and https://artists.proofprofile.net/proofs/artist/5d5aff44-a378-4c4a-bb8b-2f1aa5fad453.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Auf da Oim gengan die Kia (Remastered 2007) [Live]
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 0x9fe5665e4dbab5084a635a6c831512cdabd021ab23d2dbc91fb7b30fc2ca1c66. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEF989218502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beff3f7f6e53a65e4a93777dd1a6de8895f5d1dcd1e3787b9cb53cd98a8b025. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/DEF980229706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325939b6f4f82d93bc01dd3076cc39ad76305c34b957eaf779cf074e7c09e2ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:08Z), 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/DEF980534001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12562ef9a5dfbd31636e8d84c1935872502bfd6462e3dbbd5e7f81052fa72b65. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:53:51Z), 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/DEF981141001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7099f5867859aa8a99287a211831398a1e62f1f2dc3d4a6818fe4e16ff2beac. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEF981546201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa26aeaa5b3ec12330b490bbfddd80d1273f7277c736eb59f010b4179ee5cf4. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/DEF981546209.