Achim Petry (born 24 August 1974) is a German singer and musician, best known for singing in the German pop trio Trademark. Biography Achim Petry is the son of the Schlager-singer Wolfgang Petry. B
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 0x782d768914d1e7e2a9e1c6b0c7aa24fda5c9edfaf008edccd71f2e600fa09c49. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/996f4823-4d30-47e5-bed8-a6b3d3ee6b53.json and https://artists.proofprofile.net/proofs/artist/996f4823-4d30-47e5-bed8-a6b3d3ee6b53.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 0x8782d9585b8d5d40992dc855959330f702ffc80436eadcd24f4ec8dd0ed2e372. 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/DEBA20700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3649be5b270e3edf4e469c5025915b39069304af18abe5240b30543346812010. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEBA21400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42689d6e7ea30dd44c82834e56d6502f956e0fa6cf7a30009b125b459f546a9e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEBA21400109.
Tinte (Wo willst du hin) - Franz Rapid Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d098f51244c204071aff7b4dbb8d1138279e4f16f3372b6ad81c64121d0c80. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEBA21400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c5f51a1558751edc1e04390608dc61a2868170fd67150971368d78398c7527. 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/DEBA20700264.
Du bist ein Wunder (feat. Wolfgang Petry)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac0dd2224145ad41de07dc427c4db2bf4ad96eac656d2f9491614c77188527. 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/DEBA21600064.
Schlager Party 2016 - 70 Schlager Hits, Pop Schlager, Dance Schlager und Discofox Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2ff3a65154afd5983c774aef5cb6cf88af292b4e3a30e407f55e9dd22935be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ921500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce9e4df1b1f1f3ffe6e7e9a00c4614111e907cbc0c3c38aa6058692aa9f43c. 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/DEBA20900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac0dd2224145ad41de07dc427c4db2bf4ad96eac656d2f9491614c77188527. 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/DEBA21600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f407415fefa47359918317aa5426fb78e859ef3d4f7e23d1852d5c955f2451f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA621801465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a4c61a84da887ba53438d6f4b6f5feb231bc8f99ceb98defa832e938bbf55. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBA21400086.
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
Du bist ein Wunder (feat. Wolfgang Petry) - Karaoke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0aa86b2da66c7b3afa6d73d7323bdcd2bd3c494926078bc85807311253813. 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/DEBA21600079.