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 0x551704096c3b1caa6d4b6cac6d38cf4cf63ac1d1eb6819f9e701ef989c2d3739. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efe63e44-3400-44e8-855c-deaf40a4593f.json and https://artists.proofprofile.net/proofs/artist/efe63e44-3400-44e8-855c-deaf40a4593f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sweet Gentle: Baby Piano Background Music
Soothing Harmony for Pets in Piano Sounds
Mellowed Pet's Mood in Soft Piano Sounds
Serene World of Pets in Light Piano Sounds
Pet Symphony: Piano Delights with Ambient Rainstorm Beats
Piano Harmony: Enchanting Serenades for Pets
Pet Symphony: Piano Serenades for Happy Paws
Harmonious Piano Concentration: Music for Mindful Productivity
Bark Along with Piano: Music for Man's Best Friend
Jazz Piano Meditation Journey: Melodic Rhythm for Mindfulness
Feline Melodies: Meditative Piano for Cats' Tranquility
Canine Serenades: Meditative Piano for Dogs
Ethereal Piano Lullabies: Serene Sounds for Sleep
Piano Serenading Sleep: Bliss in Rainy Relaxation's Warmth
Piano Sleep Melodies: Rain Drifts into Serenity
Sleepscape Melodies: Serenade of Rain and Piano Dreams
Piano Music Spectacle: Dazzling Harmonies
Piano Sleep Moods: Tunes for Restful Nights
Piano's Work Rhythm: Harmonious Music for Efficiency
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 0x15e12d93b57c751484deaaf46916cb52685936626e23d9262c946063c110a58a. 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/USLZJ2445299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495fb1c084d3eaff6b7e754e94747f168ec8684f3ef7638002943d7e3926f8b8. 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/USLZJ2445308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc23a0b7998a90318f32bddce1c02026d7c6d1d1dbbe6015ebf01572178f32f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2463961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fbc70958a78478b386158082fd0c1999dd735336a335d8505efa74166e02e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USLZJ2445277.
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 0xd761b48beda9b9eec9a5b87d13344a7d509e2ca1b06e7799dd23148e0d3bfd2b. 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/USLZJ2445323.