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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f40c94a1142c2794d5c6aa0a9b715bde5d41e172e97b6e4c9f8bee2d86e9b67. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79df9a7a-27cc-4d84-a8ed-a4b37dd9bdb0.json and https://artists.proofprofile.net/proofs/artist/79df9a7a-27cc-4d84-a8ed-a4b37dd9bdb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 1, 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f82d726ebcbc6370ebbd674644542dae290e75e36f9a6b7e5c285fe23bf16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10205325.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 1: "Who are you adandoning us to"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6785904f76a2fb2e0de660d2795d64140be8789e1f762541894e9c3d938f0936. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USSM10205328.
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: "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: "I arrived at night"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b97f46c77f8b9aad09900d908cda49e9a2a97744c337bd95bf4565b669a73. 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/USSM10405466.
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: Prologue, Scene 1: "Glory to Thee, Creator on high"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4ba6678c79a3e83bdc82dd803820bcb483341e7be4ca9415f9ca7fdda5128. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:52:50Z), 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/USSM10205334.
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
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 2, Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb13918f6813d8728c7258fbc07951bbb71264617611da19a8c5eceab5c1ab1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:49Z), 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06501f62ff990e14e5e728814806bb1417c25d7ebe101deee904737a49e7ee88. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USSM10205330.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 1: "True believers! The boyar is implacable."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dc0b7b15ac80f0830025c114b40d2a5f263c7d1abbbc44d3b6f8b150905748. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USSM10205333.
Boris Godunov: Opera in Four Acts With a Prologue: Prologue, Scene 1: "Did you hear what the holy pilgrims said?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b9629a7043aa292af8e103ba6e200f8ba2f22218391711362c936d6a233ad. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10205335.
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: 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: "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 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.