Johannes Schmidt may refer to: Johannes Schmidt (linguist) (1843–1901), German linguist Johannes Schmidt (biologist) (1877–1933), Danish biologist (1908–1976), German Sturmbannführer Johannes V. Sch
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 0xabf783397c03613e974141f211893157b5fc83c35cb4e499926852430d49b69b. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d31031bc-7cfd-415e-87aa-f8454a0f3e8a.json and https://artists.proofprofile.net/proofs/artist/d31031bc-7cfd-415e-87aa-f8454a0f3e8a.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 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 0xfac58aa08b0384dfe18ccb84cf23746af4cb76b7a1e6096fb866950a92c40bd8. 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/DEQS92200000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6fc45636ed18e483d84e6be319b22c2000fa98772e9f753f3d3101de3d07c0. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEQS92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d471ef3dda67019ed3994b57db2a09871d6e2c84c07494e9690a02fe62b7a9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEQS92200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e67d650b23590f7520f03e4fbc37528bc3005a86cc6c535461518e5b1ac651. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DEQS92200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc9913f09c11b525f666fb0f1a5510eed9c80cd38fdd50bf6913cae566615b5. 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/DEQS92200004.
Brahms: Wiegenlied, Op. 49, No. 4: "Guten Abend, gut' Nacht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe91758d4fb2c0c69d8d11d9300293bc91956481155079212d584b8439c75f. 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/DEQS92200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e9a0b0dcf9926437edd049dd64e98e51084f4cf7e54336cfa890a183a299c5. 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/DEQS92200006.
Bleib bei mir, Herr! Der Abend bricht herein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2d3e6ee684f2a348621b4d4808eb10c73c1a34f993d6b2547de18eb5afd09. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEQS92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4046b1d6c13ff598c6c9b34c7fffaba103fcdd93738bc8504a896fc06ae0c18d. 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/DEQS92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9fe6eb258e7c13491b3b1d19d3b4e6e93cc5d81da5292218cdc06ae4f89ebe. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEQS92200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0530974ee7cf0ca9ea0f9a82cdbabf5e2c10568fbd7e1a76bfda7004a160531. 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/DEQS92200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf069611089171fde04ad03670f3e8d1fef82f8f36c4b415b64759e67fe3600a9. 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/DEQS92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a53f781504ae16068117471b736f27f605df00f2b94508866917167bf3d983. 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/DEQS92200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499d903323e371bce22ce60db371142c59db4e4be4372d79351a229ce1d42907. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DEQS92200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2d3e6ee684f2a348621b4d4808eb10c73c1a34f993d6b2547de18eb5afd09. 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/DEQS92200007.