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 0xa4de47a7059d0910456d004bbd23eb987e5542bc4c6ca372b6ba183cfccfcb6a. 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/2fd9cf4e-2602-4356-a071-fa546a9aabb6.json and https://artists.proofprofile.net/proofs/artist/2fd9cf4e-2602-4356-a071-fa546a9aabb6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Orff: Carmina Burana, Introduction, Fortuna Imperatrix Mundi: O Fortuna
Orff: Carmina Burana - Holst: The Planets
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 0x6c48107d2226f3d558660dd0df7fcb0ac0c83cac22be5f44f5ce1eec41101fad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC9400066 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817a986c53e42a5963c8ef8b86c74e79529a2835bc7d5ee2b6a148a57dbad8c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC9400090 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48107d2226f3d558660dd0df7fcb0ac0c83cac22be5f44f5ce1eec41101fad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC9400066 — a six-check JSON result.
Orff: Carmina Burana, Introduction, Fortuna Imperatrix Mundi: Fortune plango vulnera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251546a5cdb1e8a90281ff1d48d3dd1c0ef4d8a86ccc5fd7191df2b7eb5fee96. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400067 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Primo vere: Veris leta facies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f50254e9afb2ffcb926d234cac9d8badd080a7a6a0bbbad6e0d9e8ee5b06f23. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400068 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Primo vere: Omnia sol temperat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e52a56e2f6d7588a4c968300fc688a05a23e3933b3fec415991b5c02119e63. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400069 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Primo vere: Ecce gratum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496739d267c0b039344622528e0b21bd339c1d59fa8d9057eb6e224bf75ce91c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC9400070 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Uf dem Anger: Tanz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae48c9d9fcfcd66c505599ca6eb878a2a71c009c768849b76a024a00ddda31. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC9400071 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Uf dem Anger: Floret silva nobilis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f10c7bfd4f0ee1c645a7b0ca4ba7264db9c2b2400ac4cea2408451830223c5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC9400072 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Uf dem Anger: Chramer, gip die varwe mir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc2296a854e90780b3cb414f569f2b66ab92fde57ae57db2c786cd9a3dbda1b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400073 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Uf dem Anger: Reie - Swaz hie gat umbe - Chume, chum, geselle min - Swaz hie gat umbe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd821e8a6d4cab6b7c0021de46931a45fb84a4d7005be0ee542eecff15b430e1. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/GBAYC9400074 — a six-check JSON result.
Orff: Carmina Burana, Pt. 1, Uf dem Anger: Were diu werlt alle min
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50abf0192bbe2af15c6b935102d6bcc142a48f870e5da7c48dfe4598c6b33eb7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBAYC9400079 — a six-check JSON result.
Orff: Carmina Burana, Pt. 2, In Taberna: Estuans interius
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fadfb2decf6dc3d445b712f6bff15bf1a823aba5e8c735a6c01ca0b4b8bce90. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400080 — a six-check JSON result.
Orff: Carmina Burana, Pt. 2, In Taberna: Ego sum abbas Cucaniensis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05474b5cc6b1fa6084d498b25114657bc650ce2d1f1f198119519bdf917e32cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400082 — a six-check JSON result.
Orff: Carmina Burana, Pt. 2, In Taberna: In taberna quando sumus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e3843caf689fa69f080274929687421b5a56ff1f43e2717827311aa4ab3784. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400083 — a six-check JSON result.
Orff: Carmina Burana, Pt. 3, Cour d'amours: Amor volat undique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b09f03b21f5eb6a956f092b162a7b786cfe4c894ab8064865a3a0a0c71c4c4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAYC9400084 — a six-check JSON result.
Orff: Carmina Burana, Pt. 3, Cour d'amours: Dies, nox et omnia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33176e9a48e6eee3a2222673e09084669bb9ceb5d104ccd92ca43bd90ffbe055. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAYC9400085 — a six-check JSON result.
Orff: Carmina Burana, Pt. 3, Cour d'amours: Stetit puella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c3f55007ca6bb7b9d3ae653e00578ae9a6f4a19af58f83e0ce1b116eaabf7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400086 — a six-check JSON result.