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 0x654046aa8fa66ef4722977f190a0b79d59de62bfee01390c6a2ee5ab9752c455. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae6fadc3-143a-45f7-9275-5df17dc9681d.json and https://artists.proofprofile.net/proofs/artist/ae6fadc3-143a-45f7-9275-5df17dc9681d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thema und drei Abhandlungen: No. 1. Thema
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 0x92679f2b85818fc3e45216d11984b42ac8c7a7f7d5a7f082732c2743d8bbf299. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ATB232500071.
Thema und drei Abhandlungen: No. 2. 1. Abhandlung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef223422ae443e2c05b9ae395a8b9294ea0a7439cecb2d2a90b9992bb280abc. 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/ATB232500081.
Thema und drei Abhandlungen: No. 3. 2. Abhandlung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49628e2e3a8d5786eb32c5d23ea6b33b0d9edf2876ca6ace5e42dcbb6a88036a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ATB232500091.
Thema und drei Abhandlungen: No. 4. 3. Abhandlung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f29b27e27ea1bdedd1c74bf62b325c27968c52c95a4dfe89baa2ce1764922. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ATB232500101.
Thema und drei Abhandlungen: No. 5. Abschluss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a48376e2b81de327c3a5177b95ba96a74a25627d7a74ea9f7f7d32f87efc7e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ATB232500111.