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 0x53e3c04d86c1ccb27dfd26eff5ef869a76d2e70e1bfafae7b9096e3b1960cc5c. 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/97df7cc2-6a0a-43d5-a165-840ca376b5f8.json and https://artists.proofprofile.net/proofs/artist/97df7cc2-6a0a-43d5-a165-840ca376b5f8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Beginner's Audio Book For English And Polish
中英入门有声书, 自学英语, 试听、重复、练习和说英语
Libro de audio de inglés-español para principiantes
Ubicación / posición y direcciones en Inglés
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 0x2e4f1aa39d3db92093a2a9ce781da3bce94e4f2f758476e11481ca2988943275. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174562 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6498a312e72100f567f2c634db7a5a2f51f71d89282cda0fda1033de22f5cea8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174551 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79b6b43d6e29b3d5ac4a8efdb7203fdf21e92c71b4aeee7901e7426f80d0a16. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174552 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc7d64a13b0ceb5d00e7481f9b4beefb555541b27d39b6ef2409cfe6c9b196. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174564 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8ffa68e9e1a16af26857f066a7cda8367d9d5a14f4531c9657530d2724b0c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174553 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf83c98da614efaa4e3fe73a7f7579942f76283235f29fa6eec3873cf67aadd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174555 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a3f28245e9bc5eb4afc5e38b8bd7937a55e8fc2c42900ab3839f59c8d9c8d7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174579 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd5ba9ceac7951b3fb19070b8a2202dd7aafe3d01ea55b9d6213c01f2f0ce69. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174557 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845c1440bc0b0cf2a086305b64e16b8ec13214323e52a8d4ad59ea4e88d6b77d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174570 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b35341b65c2fd1f9d83ea2c6e9fb8f269e41d0aa9022ef35e95c21d6a7bc30. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174558 — a six-check JSON result.
Díasde la semana, meses del Año y el tiempo en Inglés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193978443b6ee411540e341db997932affcf43d184afad5f464d767efc6e911d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174583 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15cc497ebbd91ce18ff894b2c3d2bbe0a53a082998bafa4d6b1c662161bad49. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1174560 — a six-check JSON result.
My first English-Swahili audio dictionary
Learn Kimaasai (Beginner's Audio Book in English and Kimaasai)
Learn Dholuo (Teach Yourself Dholuo Beginners Audio Book)
Learn Kimeru (Teach Yourself Kimeru Beginners Audio Book)
English-Portuguese Beginner's Audio Book
Aprenda Inglês (Audio Livro Inglês-Português Iniciante)
Learn Arabic (Teach Yourself Arabic, English-Arabic Audio Book for Beginners)
Apprenez L'arabe (Livre Audio Français-Arabe Pour Débutants))
Learn Lubukusu (Teach Yourself Lubukusu, Beginners Audio Book)
Learn Ekegusii (Teach Yourself Ekegusii, Beginners Audio Book)
تعلم اللغة الفرنسية كتاب فرنسي ـ عربي بالصوت للمبتدئين
تعلم اللغة الإنجليزية كتاب إنجليزي ـ عربي بالصوت للمبتدئين
Teach Yourself German (English-German Beginners Audio Book)
Selbständig Englisch Lernen (Englisch-Deutsch Hörbuch Für Anfänger)
Apprenez L'anglais / Livre Bilingue Français / Anglais Pour Débutants
தொடக்க தேதி உள்ள ஆங்கிலம், அகராதி ஆங்கிலம், தொடக்க புத்தகம்
Matuto Ng Ingles, Audio Libro Ng Ingles-Tagalog Para Sa Nagsisimula
Angielsko-Polska Dźwiękowa Książka Dla Początkujących
Teach Yourself Urdu: English-Urdu Beginner's Audio Course
English-Gujarati for Beginners (Teach Yourself Gujarati)
Learn Hindi (English-Hindi Beginners Course)
Learn to Speak Spanish: English-Spanish Phrase and Word Audio Book
Learn to Speak Swahili: English-Swahili Phrase and Word Audio Book
Learn to Speak Japanese: English-Japanese Phrase and Word Audio Book
Learn to Speak Persian (English-Persian Beginner's Course)
Learn to Speak Lingala: English-Lingala Beginner's Course Audio Book
Apprendre l'anglais: Expressions anglaises pour voyager (Guide de conversation anglais) [Bilingue anglais-français]
Apprendre le Lingala: Livre-audio bilingue Français-Lingala pour débutants
英和フレーズと単語帳、旅行者やビジネスマンに最適！
Learn to Speak German: English-German Phrase and Word Audio Book
Learn to Speak French: English-French Phrase and Word Audio Book
Pasaporte Al Idioma Inglés: Aprender Inglés Fácil (Frases Y Palabras Inglés–Español)
کتاب آغازين فاسی و انگليسی , راهنمای خوبی برای ياد گيری لسان فارسی و انگيسی
Learn to Speak Chinese: English-Chinese Phrase and Word Audio Book
Selbständig Englisch Lernen (Englisch-Deutsch Phrasen Und Wörter) Reisepass Für Englisch
学习英语; 英汉短语和单词书, 为旅客和商务人士的理想选择
Learn to Speak Portuguese, English-Portuguese Lessons
Greetings in Portuguese, Everyday Phrases and Civilities in Portuguese
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a2e4b8bd74928f7a7408b331f0f51628faba6f1673990cf64c2943fd24b5c9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91473354 — a six-check JSON result.
Aprender a Falar O Inglês, Lições Do Inglês-Português
Saudações, Frases do Quotidiano e Civilidades em Inglês
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e470f29f10a497fef37c6a96e66de8d4fdbc56a9b9c6c46622452b33a0efc11. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91484201 — a six-check JSON result.
Learn to Speak Tagalog, English-Tagalog Lessons
Matuto Magsalita Ng Ingles; Libro Ng Mga Salita At Usapang Ingles-Tagalog; Tamang - Tama Para Sa Mga Manlalakbay At Negosyante
Learn French, French-English Course for Beginners
Apprendre L'anglais, Livre Bilingue; Français-Anglais