Johann Christoph Demantius (15 December 1567 – 20 April 1643) was a German composer, music theorist, writer and poet. He was an exact contemporary of Monteverdi, and represented a transitional phase
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 0xc088c203ee3a84b88239f99698da9f4f97b63c7ee5b8f398007d4f00c843ba51. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d13b46f6-870f-4411-81dc-091e54fe2b41.json and https://artists.proofprofile.net/proofs/artist/d13b46f6-870f-4411-81dc-091e54fe2b41.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 0x4eb4dcb39d61b44ec4d6faffeac83d66111257bb723569ddafcfe22437e0b67d. 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/FRZ147307090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f4fd66b061a3a0a651248cb482a69c752c67bc12c3b0b3c75d8cf336e0dc12. 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/DEAF40700098.
II. Teil 1: Fürwahr er trug unsere Krankheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf5925c4b4198f0b418c772af172c26e4341d2cec1bb8bb9642aa05ce1246bf. 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/DEB202258302.
IV. Teil 3: Wenn er sein Leben zum Schuldopfer gegeben hat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b5782319f5f115c6f1e4b03ed331a74583f4a426ed3ad4cfef5bf46c08dbd. 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/DEB202258304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c6ec41725a7685cd5c5a97535dee5384548e6ff9ccb1305b09d1cb772d5feb. 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/DEB202258313.
III. Teil 2: Da er gestraft und gemartert ward
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3189659fafce6373e3b7ffce23edc8bb3b5ec57cf2e5ddc11cb53169a9168. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB202258303.
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
Eingang: Höret das Leiden · Evangelium: Jesu ging über den Bach Kidron
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352e17b578242866f868d1689f4abf108d94b95e9fa244ca4cb99542dee376a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB202258309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e3217a189860d554ba42cd505a9a516589f0331e684e157869309a612bb09. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB202258311.