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 0x0d227f7ebaba5eab2b3eb213a78e329b0af7e2800ac6859c7f025d2a96fe8f4f. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/183be83e-20e4-4dd8-ab98-2784a7c643b2.json and https://artists.proofprofile.net/proofs/artist/183be83e-20e4-4dd8-ab98-2784a7c643b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 1: "I arrived at night"
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 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 I, Scene 2: "I caught a grey drake"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27f831247d65f329d014758cabe45dd900dbeee3fc45709b905ffd9b2777c3e. 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/USSM10405470.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2, "Why are you so pensive, comrade?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439b8ddb3bb2230f0a5eee3f0c430675fc93c93a2913fdb6dc63d1614d125597. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10405472.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: "And his age... and his age..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064847ad27d41704b03fba6ab86c1baff934c511ea50d09a7ebb0c71f785541. 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/USSM10405477.
Boris Godunov: Opera in Four Acts With a Prologue: Act III, Scene 2: Polonaise - "I do not believe in your passion, sir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da1cc6b07d9dce19ca0e1e3b54848c1275f90a865a2606e7ecc2f33e9e73813. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405499.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: "Give me some fun"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849319e3274f7f034b83c739fef8c9055aee521510993ce30574a4367ec23c2f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USSM10405471.
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: Act I, Scene 2: "Why don't you sing along?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc351880df6bf466dabe1e00ea43aaf626baa5407fc026c9393a64984f12a86. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USSM10405474.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: "We are humble elders, honest monks"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd3b7ec8a7c8f11080b852f5de1521f1b09bbfd40a9382ebab0154ed925ac60. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405475.
Boris Godunov: Opera in Four Acts With a Prologue: Act I, Scene 2: "What are you staring at me like that for"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0e0aab4da1116298afd746b539a89b11f6dc4d1649a1562d3bb3c2fc17cfc3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10405476.