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 0x27ad4c5abd1994d1069cc9e9e1c31f575dccf603eb6a411712c69a0ed52c582e. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/592609c2-cd8b-4307-afb9-ba64c83a3477.json and https://artists.proofprofile.net/proofs/artist/592609c2-cd8b-4307-afb9-ba64c83a3477.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 0x9dcad32c13b5e10d51d272215599aa5e2b9f4ee27b9724d9ddf5e5ad73d32689. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FROV62129601 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Shake the Cloud from Off Your Brow (Belinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34c48f0c5abe6e33e505877c3636ee23d391ad8563108725a41539ba7907783. 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/FROV62129602 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Banish Sorrow, Banish Care (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba23f39f005dbd2fe55d361582b79284a22f3ddc42e101c5e5e22e0406a02d0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FROV62129603 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Ah! Belinda, I Am Press'd with Torment (Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9323a46331627ca9fcd8c62f925d4a730287007f830658689147ddf817ca4e70. 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/FROV62129604 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Grief Increases by Concealing (Belinda, Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885046e21154fda4254c3abde15ff800887393a840ebda9a0cfc07da7de87f8b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62129605 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Whence Could so Much Virtue Spring? (Dido, Belinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57927eb6c1273421f79f84f5a6e27227c00c4df04d0f599c0554da81d7a7321b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FROV62129607 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Fear no Danger to Ensue (Belinda, Second Woman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f387a28eb42dde32ca3e30a24b4965a313693848a91d69cc38fb1914b1f6f. 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/FROV62129608 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: See, Your Royal Guest Appears (Belinda, Æneas, Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9683c35dba0259640cda7c4ec594e9205a91a8583280ba2382c7d218f44bf1e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROV62129609 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: Cupid Only Throws the Dart (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181be0919751e38e5f789db82d8e40c969a611ec0940b3c690716b57d409ec87. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62129610 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: If Not for Mine, for Empire's Sake (Æneas, Belinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6ec282695989feaeabc5e6d9e9ca79c55c9f5eeb56868933856755efd01cbe. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62129611 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: To the Hills and the Vales (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4039a81fd55efe3165018ec8d1d662f7f1be06725bb6f7b4cd9a6380d62641d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FROV62129612 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act I, The Palace: The Triumphing Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc2e0c37fe8151a4dcdf482312edc64b8e4f6326612f77e02131e3169ca650. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROV62129613 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: Prelude for the Witches. Wayward Sisters, You That Fright (Sorceress). Harm's Our Delight (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ab0c45aa8949c1bef37093823ad58bc566e23a479bbd9e61f67e34de0e39e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FROV62129614 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: The Queen of Carthage, Whom We Hate (Sorceress). Ho, Ho, Ho (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfc1f413284cbd5209ac17a8d8a3c76bd808c451a415c4026641f49fb51bc1e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62129615 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II, The Cave: Ruin'd Ere the Set of Sun? (Two Witches, Sorceress). Ho, Ho, Ho (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf679531ac1943af91d37075a3b4c3dff03ede8fc934636c78a76d7ede5a554. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROV62129616 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: But Ere We This Perform (Two Witches)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e85e67dd8a6b66bcaaf47f4cc24ddd1ab079303020b120fe5aa88302728a1d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62129617 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: In Our Deep Vaulted Cell (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe372864b3e36eeed00a0a37ff977f4201fae17b645cbfc8b60e0e7464e2b177e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FROV62129618 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: Echo Dance of the Furies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77342b2b7ceb0827639856abf30cd138787cdd3b5a2840a8abbc1515e9a226f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FROV62129619 — a six-check JSON result.
Dido and Aeneas, Z. 626, Act II Scene 1, The Cave: Ritornelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61478608efd0e8056467b9897f3c9047de9ea5400679fd1921fe018e06f71678. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FROV62129620 — a six-check JSON result.