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 0x9262bdd8742acf3957559482b72f295807e2e4cb4b80c5bbeb0b6ccad06b59d2. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08c05560-4844-4ca8-ab9c-098b73e586d7.json and https://artists.proofprofile.net/proofs/artist/08c05560-4844-4ca8-ab9c-098b73e586d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 2, Introduction
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 0x9bb13918f6813d8728c7258fbc07951bbb71264617611da19a8c5eceab5c1ab1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USSM10405457.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 2: "Long live Tsar Boris Fyodorovich!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c28e6cf7b0413eabff482eb381f34d314b847b9404a63af9ba1179fd8c51ea0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USSM10405458.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 2: "My soul is sad"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fe78ad2777c132bbfe0dc525822314c902601f80c75a4179de614616db4f3. 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/USSM10405459.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 2: "Glory!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58601b6c68cd49ba330515d587f2c4eb80597d919ed0a5cd317eddcca6c0652a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405460.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "Just one final story"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc1c501b76d9cbc0d53ee8306323203c1d85eaf4c32ed772cf3027294c19abb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405462.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "O Lord, strong and righteous"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e1318b1541b0e5e8c41f5323acdec7c0992be7587c53a41285e6e6284b799e. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USSM10405463.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "Do not complain, brother"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d05de318bfa1f203408e7c503f78b46c031c240bf66bd021246804fc1bcc52. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405464.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "For alLong time, honoured father"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdd7b9ce873518e5a4d5147fdc4986caacc0022700db339c1a190854b434831. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USSM10405465.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "How old was the murdered Tsarevich?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366868281090294139d3ab45bad3ce8ad260693e0eaabab1fe7916032a07683a. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USSM10405467.
Boris Godunov: Opera in Four Acts With a Prologue: Act 1, Scene 1: "They are ringing for matins"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba24dcbf6acac96bb7500aa5c1dc7e34175fe03f9b69185ffe1b308139391a13. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10405468.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4899298436662073f0c013d37fdec4dffa8d376149a042a6254e673fc1ace. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405469.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: "Here's what happened at the town of Kazan"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc2b733c905b9e53779ea7075ae78a1826315f1dd39352fe74eecca4a7f00c6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405473.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "Where are you, my Betrothed"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dcecdbcecd9d088368b8542ca0aa66e045454747def8a867ecf40773e78935. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USSM10405478.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "Oh, that's enough, Princess, my dear!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f16d005dfe6afe4e504f3c482a4e9b74677a96c9cbd52ab2efa484624a6a380. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USSM10405479.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "A gnat was chopping wood"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf6cc672e8cbff83e09e95f276d82a24419749939b1bcb6bb2e54ec35a121f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USSM10405480.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "My little tale is about this and that"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f98f7d963a5e4529366c19a9ec98d0c68f912bf1ca4fa5880f8b23544fa7d54. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405481.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "What's the matter? Has a wild beast surprised a sitting hen?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5048a1686084aa33bed6b92668458d12d965632a2279b68d2c0881ac6bc4e32. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405482.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "I have achieved absolute power"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8015509b9a069283ae7e44977f91465b8c0388602394b1857cceca3ac2d717eb. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405483.
Boris Godunov: Opera in Four Acts With a Prologue: Act II: "Hey, Pss!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffba5f0b209372267bea3ddc5c92686695c7906ab367df9b80b39e76b64c688. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405484.