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 0x33d2604d7bb70ecb2d6c8091473aff7eeab5cba6f8c9a79916484242fadba3f5. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a294dc-18fb-499e-8bdc-3d4dd278c735.json and https://artists.proofprofile.net/proofs/artist/e9a294dc-18fb-499e-8bdc-3d4dd278c735.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Dido & Aeneas, Act III, Z. 626: XI. Chorus "With Drooping Wings"
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 0x5ad9878ec0b1293558b8e8bdc015b7bcbb922624fea922d44958e69859a580a1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR50X0714039 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: I. Shake the Cloud
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc264ac3c568be1c73bbce888125bd41bd4e458b74d0f91084f6f9a502fb5a2ce. 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/FR50X0714002 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: III. Grief Increases
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8a5aebc15690ece24cf2ea6125737c9292077430ef7d0d9a1e259d86e7d3a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR50X0714004 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: VI. Chorus "Fear No Danger"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4b4138396793da18c78b780f4332e4794e1a92868e0e90b39dc3462f33781c. 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/FR50X0714007 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: VII. See, See
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5c99892006f6d12bbb810bddb8cadb183f66e1b4a73efcfee216396104bb60. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR50X0714008 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: VIII. Chorus "Cupid Only Throws"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf98ec280c460be097589bc2369a08092f8253129b0d9bdc49a32c3c5b3fa68. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FR50X0714009 — a six-check JSON result.
Dido & Aeneas, Act I, Z. 626: XI. Chorus "To the Hills"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4904b9044479494b7de7118c8a3928229364c231b3109c3280e2ee9b78f77289. 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/FR50X0714012 — a six-check JSON result.
Dido & Aeneas, Act II, Z. 626: I. Prelude for the Witches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fe6eefd8f9da1bd8f4bc49c075a7f691eb63865d2a5a74a60916706283ad07. 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/FR50X0714013 — a six-check JSON result.
Dido & Aeneas, Act II, Z. 626: VIII. Chorus "In Our Deep Vaulted Cell"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4417b169ae7eb24fd88972e1d65873db82087750d97cc99b69b59eb74d426. 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/FR50X0714020 — a six-check JSON result.
Dido & Aeneas, Act II, Z. 626: XI. Thanks to These Lonesome Vales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278b831e505079643ea65bc26e6ef45ffc3470bae94d9d437472a6af145ee26. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR50X0714023 — a six-check JSON result.
Dido & Aeneas, Act II, Z. 626: XV. Haste, Haste to Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2a9b83b878a5d78f5b30cb78d84d9060b9b71ac2d173356a316f2e20067da. 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/FR50X0714027 — a six-check JSON result.
Dido & Aeneas, Act III, Z. 626: II. The Sailor's Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511528bfc3730d0ebd8c3458f071d863bc7052006b07b2b43630f15bd8ee9c70. 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/FR50X0714030 — a six-check JSON result.
Dido & Aeneas, Act III, Z. 626: VIII. Chorus "Great Minds"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691e90e3a803283b4568bdd6723b92349df42f64913ac548462a04486b2bf53. 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/FR50X0714036 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9878ec0b1293558b8e8bdc015b7bcbb922624fea922d44958e69859a580a1. 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/FR50X0714039 — a six-check JSON result.