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 0x0430b4f154a2034f1979d5848bf0906f3933420ddc79a61c4cd91ee3797a2224. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/930ea15d-5fed-4a66-be5f-b18cf03f0e9f.json and https://artists.proofprofile.net/proofs/artist/930ea15d-5fed-4a66-be5f-b18cf03f0e9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Präsentiermarsch - Präsentiermarsch für Fußtruppen
Bearbeiter: Theodor Grawert / Oskar Hackenberger / Friedrich Deisenroth
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 0x797b6842e0c71c073daedc228336aa9a6a7ce8e47fd2a76a30f7290b59136875. 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/DEE700000793.
Der Dessauer - Marsch des alten Dessauers
Bearbeiter: Theodor Grawert / Friedrich Deisenroth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022bfe4c9d98bf37d2930c68098f99c374042337c887e0ae3deae54482d13f7b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEE700000794.
Bearbeiter: Oskar Hackenberger / Friedrich Deisenroth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c1309265510a91a44fed4b10d1a0f71412a900a4c80c64e3e41ea6708d89ab. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEE700000873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1d8a54fdfd0d765f262c69bd6ca1fc12447d9a3c6884df3f9407138cba6bf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEE700000874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7d116b312dd51725f0c497730decd0e4e1f95c9485ea9f4ed96df90577660d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DEE700000875.