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 0xc18823b2c0a9ee7e4d03c25f04cd3a4b51ed80cbba1e7effccbf696c9e9466cc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75da872b-45f6-477e-b35f-91f02592d81b.json and https://artists.proofprofile.net/proofs/artist/75da872b-45f6-477e-b35f-91f02592d81b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lernmusik Englisch, Vol. 1 (Wichtigste Wörter)
Spanisch Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)
Italienisch Lernen Mit Musik, Vol. 1 (Wichtige Verben Und Vokabeln)
Portugiesisch Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)
Kroatisch Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)
Französisch Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)
Learn Spanish with Music, Vol. 1 (Essential Words and Verbs)
Together, Podemos (Spanish Verbs: Poder and Expressing Ability)
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 0xcbab781912f60b766724b7c6eac7fffd8f3376b40ed6e88fb4e882c8634b9134. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJC2410672.
Where Is the World? (Spanish Vocabulary for Everyday Conversations)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a1ca50613b33c9e211f21f0b6c429833ee5b8b596a5a7bc830d028e9debd3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJB2410709.
Can I Dream? (Puedo and Expressing Wishes in Spanish)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1022ddfe2a11f45e4e35b71243a917e4c77803ffff615ec107dea2a0f14a19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJB2410716.
What Is Love? (Spanish Grammar – Qué Es with Feelings Vocabulary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429996ea8ddefb9609b625ab55d0a5092c798507c70bc061bb9a13e09bb41ee3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2410728.
Vietnamesich Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)
Learn German with Music, Vol. 1 (Essential Words and Verbs)
Learn Italian with Music, Vol. 1 (Essential Words and Verbs)
Learn Portuguese with Music, Vol. 1 (Essential Words and Verbs)
Learn French with Music, Vol. 1 (Essential Words and Verbs)
Together We Have (Learn French with Avoir and Possession Vocabulary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e5c6dbb098e9bfa5445ae62aef53fda5793c87ea38ba9bb59e9854076ca1e0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAJB2460625.
We Go Anywhere (Aller in French: Practical Verbs for Everyday Use)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c99b69d99e9dc6c844f140710c19c60864544ac12418ddd0959fcd74bab5ff. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAJB2460630.
We Can Do It (French Verbs: Pouvoir and Expressing Ability)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04252e4659f560775dbcfa9a0948f906c0050258e57128492df86c808bfccf16. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAJB2460633.
Is There a World? (Il Y A: French Vocabulary for Everyday Conversations)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0413bcd0f10a570838f3f7fb7f04fb8f0ad2221a7fbf3a1e76c044fb191452b8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAJB2460670.
What Costs a Dream? (Combien Coûte: French Shopping and Pricing Vocabulary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b9735bfd57e02216cd6fe54455176866ffcbe755e94d56537ff9bc3fa8d76. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2460691.
Can You Dream? (Learn French with Peux-Tu and Imagination)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df949edae555a6c0e98d0bf6b0738ae3f7ab31c470aec8814fbc7d8ed764ed1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJB2460698.
Chinesisch Lernen Mit Musik, Vol. 1 (Die Wichtigsten Wörter Und Verben)