Mathias Grassow (9 May 1963 – 13 August 2025) was a German ambient musician whose recordings can also be classified in the genres of dark ambient and drone ambient. His music often has a meditative an
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 0xbe3a999dce533ab2ac29ce1b90f1d9586944ce16af6a10d424c2dbaf20c6dd56. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbf9db5d-91bf-4be3-a608-dadd728cc334.json and https://artists.proofprofile.net/proofs/artist/dbf9db5d-91bf-4be3-a608-dadd728cc334.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Fragrance of Eternal Roses ( 2010 Remaster )
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 0x45253fdfb92771edb4c18465dceab501289e88d0db5642f21aea6aa1e0e54662. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM21396503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3784d647c3d2554d50329df41f0ebf65ffcf7f615d751bcc53b8e509db940. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USHM21396504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea218cc35a518341b4a5e9e8cbc0f969e58c0e8ceb60b010d7c918a69a7fc282. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USHM21396505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7378a2ab5c54b8a657230ff0cdfcdb7494000e3691fc6303af3505da8385c6ca. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USHM21396506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44029a90910443cd8917dc8a4bb13f33016b4f6d04f99499835e0e07521d10e7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM21396507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30f7529f9a0e4dd5147412c72c59552cb0f68d45a25f5205666bd571a4efd6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ81937848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd3b616eeae39a5c67037e5eb0f9107fd76b8a876aa94a5c8dc5ec5e9ce9d6b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ81937852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06bf90771c8cedee15b894eac79cd3ecd1236b1278e3f9aff4cd6764f700bbd. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DELJ81879487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d6a2fee2d39046e49831fe635f3b74b6781f36776b820a26a4860bbc7ee6c9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DELJ82026045.
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