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 0x2ac6229949a2dcc7cdb9a3e9d4002a531ec4671cd84d5421397ffde970f9e4f4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/720d52df-92b0-457d-96fe-7917d202a8af.json and https://artists.proofprofile.net/proofs/artist/720d52df-92b0-457d-96fe-7917d202a8af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb09a1194ca7e439328a60abb9381a27f81602f38b29c5371e384d764170d7ed8. 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/GBF077530409.
Carmen, Act I: Avez-vous quelque chose à repondre? – Tra la la la
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570baca4da6e3fa0ac92cc4bb8357102fa48156b4c77870d40cd4c77ff2c1c9f. 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/GBF077530410.
Carmen, Act II: Chanson bohème. Les tringles des sistres tintaient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1b724d6c00233dc92de128eff94c1a3fa373453162366e370c00b07d490c9. 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/GBF077530414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b58ebee111fe5ae4f885ab86f1bf2fe95e514f086deefa6b70874044e7cd3ee. 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/GBF077530433.
Samson et Dalila, Op. 47, R. 288 / Act 1: C'est toi que sa bouche invective...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46674573c22d2a816e4edfa01038fee001a671e72ae027c97ab9dc5636f33183. 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/DEF057830013.
Les Troyens / Act 1: No. 8 Ottetto et double choeur: "Châtiment effroyable!"
Chorus of the Royal Opera House, Covent Garden
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfbf879473342847c4e18197f4a88b924d05f427d305f97e10e72bc4ce48313. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLA506900567.
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
Carmen, Act I: Chorus of Street-Boys. Avec la garde montante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe6e1a387e69bb3a5ff7ad6ffe0b3c00f0c5f1dcee089ca7fcb0308bd65fbf. 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/GBF077530403.
Carmen, Act I: Finale. Voici l'ordre, partez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9bff7c8c60777930c858fda6280973d09db510a51e79060caf848bc0c2df2b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF077530412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd87d81c635c0ea627af9fc1363305e184e19c218249fa8e5d2d1c632528a2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF077530415.
Carmen, Act II: Toreador's Song. Votre toast, je peux vous le rendre – Dialogue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65fe2081cb6fe6e502e6316433142ffec5fab5c4798603e6ff7f302ee1f6260. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBF077530416.
Samson et Dalila, Op. 47, R. 288 / Act 1: Qui donc élève ici la voix?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8765dbfb4d79709d25fe10719aea26fbd5bc5b6ebe359f174e61119de51b0389. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEF057830012.
Bizet: Carmen, WD 31, Act 1: "C'est bien là, n'est-ce pas" (Don José, Zuniga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372d53a80b9693e61cf4302536026e021ba7b7089680acfc3d58ebd7d2613f43. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ207401004.
Bizet: Carmen, WD 31, Act 1: "Au secours ! C'est la Carmencita !" (Don José, Zuniga, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f609a8829f300fd6babcb4f40af659bca842b331d76f910099ce527c690559. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ207401011.
Bizet: Carmen, WD 31, Act 1: "Tra la la" (Carmen, Zuniga, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6e909b81c703167be6db1ff53ae8f63b9e05e0fd21062fe8fb13a11137cebf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ207401013.
Bizet: Carmen, WD 31, Act 1: "Voici l'ordre" (Zuniga, Carmen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8399d541f799d7356251cb69c902a475cec1f863d5afaceb8444632d1cee8f0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRZ207401016.