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 0x5856e3c26e0d0438a7bb5b2ff6e487b7251e2ce34826514e4d9404a678fa7f05. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f882a0c-8ae3-4dd1-817b-f416c887d7bb.json and https://artists.proofprofile.net/proofs/artist/0f882a0c-8ae3-4dd1-817b-f416c887d7bb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
(Jazz with Strings) Music for Refreshing Spring
Magical Music for Meal Preparing - No Drums Jazz
Music for Cooking Reflections (No Drums Jazz)
Breathtaking Background Music for Falling Asleep
Smooth Jazz Chill Out - Background for Easy Summers
Música Para Trabajar: Tonos De Motivación
Quartet Jazz - Ambiance for Entertaining Hours
Un Viaje Lofi: Tranquilos Ritmos Lofi Para Escuchar y Relajarse En Casa
Music for Literary Daydreams (Bossa Guitar Trio)
Jazz Piano Duo - Background for Studying Legends
Backdrop for Slow Times - Piano Bossa Nova Duo
Ríos Y Concentración: Corrientes De Agua Serenas Para Trabajar / Estudiar / Leer
Eficiencia Bienaventurada: Melodías Ambientales Para Sesiones De Trabajo Mindful
Oasis De Oficina: Música Relajante Para El Trabajo
Éxito Sonoro: Música Ambiental Para El Trabajo
Ecos Eficientes: Música Ambiental Para Productividad Laboral
Sonidos De Estudio: Música Para El Éxito Académico
Mentalidad Melódica: Música Para Intensa Concentración
Ecos De Productividad: Música Para Un Trabajo Eficiente
Música Para Enfocarse: Ritmos Para El Día De Trabajo
Música Serena Para Estudiar Con Claridad
La Concentración Se Enfoca Con Delicadeza
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 0xef68e5f78b08540e8fec1097e222ba9fe3aa12b7f4e5408fb0d9657054d18567. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504004 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4b5ff72bf312bfe92bd81261086da732024afa8662ecf0824ffb4e4cd5a2de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504012 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa81925b75b88e1a13da9d01a1f6a9590da4af437239f34d2fb45e375117578. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504019 — a six-check JSON result.
Estudio En Silencio Profundiza La Comprensión
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d20f2d007e925ba5ee431e91d4169633de89a5bd0fbbcca012881d34e657d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504026 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67facf134070f4c148b4924cb1fca6583017e5ae44820457c69700fa76a12110. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504034 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7fb906a6bd9992f8d28da0fc9c61f97d2c3acc0df64ea5507512ee11f9fd14. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTV32504041 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a4cb49d849acbed6ece34ac6b6f2c7157df121f608b122b18eeb3eaf641fa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504049 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb580ea70d2787670ecb29b420795d68c2e1a3bffc59217ec7896b5dca51dec9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504056 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63167ad786f23df6b484eb99d30600dafb0e3a53d0258a72119cda227886d26. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504064 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ec608f2b7df62558c9d3848cfc231177870d74ba4455292f81f9257f0604e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504079 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a99b65845e6498face571ec9ede9cc56435c5848144d4b72a8cc3485d134f16. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504088 — a six-check JSON result.
Concentración Silenciosa Profundiza La Calma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af67a4603c939158f375e20f42813fe62cf38d8ab91e712322db2d37e2ff388. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32504096 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594c2571b496a9fde48c8c97317bc25ea2697ed79680447e43d10bed3adf576. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTV32504105 — a six-check JSON result.