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 0x8bc91680028e74bee44f4e1754f74e6402062ee4a323fe116ec15933beef478a. 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/91c59447-8290-4a24-b2e1-48f4f9e2f975.json and https://artists.proofprofile.net/proofs/artist/91c59447-8290-4a24-b2e1-48f4f9e2f975.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x920a7b0ee4526a0cc3570f602abdd5e1093ac09e39c3ecd19e404514498d0d04. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91114372 — a six-check JSON result.
Die schönsten Sagen des klassischen Altertums
Kapitel 1.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ecd8d6ef5ad3acbf265fa8fbd1f925cf5a9986073429b566903a3ddf16a0fc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188603 — a six-check JSON result.
Kapitel 1.2 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7300447fbf57cd9280b9bdfa9aa7e3e1d4b5ac5a8e6c22cebab772c2de10c516. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188604 — a six-check JSON result.
Kapitel 1.3 & Kapitel 2.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b87ed77f7b9d883c496d31e61c9efc2cbb844faf101b1a18c426627ad0e4d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188605 — a six-check JSON result.
Kapitel 3.2 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119227fda9846beb7a9d6ec5caa2de17947d94b77b1d2b6c907ce1793396a99. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188607 — a six-check JSON result.
Kapitel 3.3 & Kapitel 4.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9637002eb0899a4216ba71165ad7666e855d9457e2a819152fba994e2a24548c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188608 — a six-check JSON result.
Kapitel 5.2 & Kapitel 6.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32640434ab087173ae3b6522a933ef6a56f615e9f7c0c45c059c820ca0627bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188611 — a six-check JSON result.
Kapitel 6.2 & Kapitel 7.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a527be54f8ac6091282fe6e5626b6e1a8586cbe613cc87fe1418a2bba6268b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188612 — a six-check JSON result.
Kapitel 7.2 & Kapitel 8.1 - Die schönsten Sagen des klassischen Altertums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae35ad12b023608838bb97bccb8a234ecbee4d283145af26a874f33a8a171f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ81188613 — a six-check JSON result.