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 0xab457a09020490687c44fc16f4f369aacc95c0e54d3777817015db8a46bbcd92. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17572e9e-bbef-4d73-a7f4-7295cd536263.json and https://artists.proofprofile.net/proofs/artist/17572e9e-bbef-4d73-a7f4-7295cd536263.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Rondine: Act I: Chi il bel sogno di Doretta (Prunier, Magda)
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 0x92f80463c28f751022fca38de1eef2ec358e39de61eb144d888bbb08fa575939. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190871303.
La Rondine: Act I: …Forse come la rondine (Magda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56f1cdb7a4387877092e39d674cfce9b846396a44de67a8e4fed3f52c0cef9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190871314.
La Rondine: Act III: Non maledire, ascolta (Magda, Ruggero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa4d859bba937896cb632d6b4de253bcf8fd855d47c89bc13c3180f0c788d65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI190871414.
La Rondine: Act II: Bevo al tuo fresco sorriso (Ruggero, Magda, Lisette, Prunier, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ffa3f4b1d1056e50e91baad3b63f4aba7b7812843cae7c51c44a611d5a1d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI190871326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6096acfac4a5c0c3b9f7198a14c313e5c5ddb3572544fadc59ae9d70da74f56. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKI190871301.
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
Rachmaninoff: Spring, Three Russian Songs & The Bells
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc22fa93a7672915bb6d3c83fbb0c91a7b7818005f8e3aa65da614b12b2baa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLWD1001601.
Aleko: The Old Gypsy's Tale. The Magic Power of Song (Old Gypsy, Gypsies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97d60203b9459df922c37c3138e99882aa2c74a1d34fdd96282d3822bd4078. 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/GBLWD1001603.
Aleko: Aleko's Cavatina. The Whole Camp Sleeps (Aleko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cb85d54007942512040617e91ff3481b97fbd3fa9aa1ff61e5097614f7606a. 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/GBLWD1001610.
Aleko: Scene and Chorus. But Why Did You Not Immediately Hasten After the Thankless Wretch (Aleko, Zemfira, Young Gypsy, Gypsies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcda3ea943a87bcd359c6998d083433e430dbaf749a068b4e1c68e35f8cfb8e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1001604.
Aleko: Duet and Finale. It's Time to Go, My Love, It's Time! (Zemfira, Young Gypsy, Aleko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190ec01ea0314e2fbbd955d6b85158faac7409a8e0233cd11d333f7b8acca54. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1001613.
Francesa da Rimini, Op. 25, Prologue: The First Circle of Hell (The Shade of Virgil, Dante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a34102af80e43e1c2765c8e0be80b0767ebcacaf2d36332c3f238174c7c78. 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/GBLWD0709302.
Francesa da Rimini, Op. 25, Scene 2: The Fair Guinivere… (Paolo, Francesca, Lanceotto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2519494e0f4ecfeea3b89845eabf195be2ea8403ae755c359b84bf81e176ef9. 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/GBLWD0709309.
Francesa da Rimini, Op. 25, Epilogue: Epilogue (Souls of Francesca and Paolo, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fca57c14c7782a5a8b9b54132d34c17970de79f1ae57047b2c0826e48f19a6. 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/GBLWD0709310.