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 0x407096656bc3f3f0563f5525afd430bfbb4c8737b1404f69573a44f3de331817. 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/b394f33a-a02e-4a99-bbcb-fee631d3afc2.json and https://artists.proofprofile.net/proofs/artist/b394f33a-a02e-4a99-bbcb-fee631d3afc2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sleeping Baby Lullabies: Calm Nights and Sweet Dreams
Baby Chopin: Essential Classical Music for Baby Sleep
24 Préludes, Op. 28: No. 15 in D Flat Major. Sostenuto "Raindrop" - Piano Lullaby Version
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 0xf4ccd954ca45cf764737449bb93330aa5b0ad4658d5da0305dfb774e6579a011. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITK262500165 — a six-check JSON result.
Spring Song, Op. 62, No. 6 - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8709a0760e252e48c0422b4b9360f9c1c4fb72ad7bca78ed0e6d9c0caf60a37. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITK262500166 — a six-check JSON result.
Serenade from Don Giovanni, K. 527 - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a4e744392730b95c48785417457b08122597ec02df2a6674543e166c693543. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK262500168 — a six-check JSON result.
24 Préludes, Op. 28: No. 20 in C Minor. Largo - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78569fc312a442d06cf8662d1e7f6431f75a194ee1f43fe1280da1f151ddd765. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITK262500170 — a six-check JSON result.
Adieu to the Piano in F Major, Anh. No. 15 - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50389c5af1a5917691f8f57d8162894e9371964e7eb2d786c8c4f016e7183d57. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ITK262500172 — a six-check JSON result.
Pavane pour une infante défunte, M. 19 - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793c00a41c683392a006d74cee2f63341b6e2606f488e41b9f9bf52596f006d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITK262500173 — a six-check JSON result.
The Four Seasons, Op.68: Concerto No. 1 in E Major, RV 269 "Spring" - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d973acadd750d04923a1f260ad29a1e04b82be6a698a2878b8d1ac81f400f56. 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/ITK262500174 — a six-check JSON result.
Gavotta in F Major - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac16cc93244788737f80ba3eb159a1f3b07505be3918c5cd777aadef3ccad49. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ITK262500175 — a six-check JSON result.
Rinaldo, HWV 7a: Lascia ch'io pianga - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbee759e7cd30a0c6d23ad62e4724a666d1c64b7a689c2e932cc0e0ab05d186. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK262500176 — a six-check JSON result.
Symphony No. 9 in E Minor "From the New World" - II. Largo - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c02e05b6e3ecfd55d9244a5815cba4a93bd503b84d6a3264c58606ab01c161. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK262500177 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d857f3b2f7afd1cdcf698d3673b050deb3c6fcc747ba8e3f5b1f72489db76. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITK262500178 — a six-check JSON result.
The Happy Farmer, Op. 68, No. 10 - Piano Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb02cbed54d87edbbd386fc356425e90f0d54d032ff00fd936b2b00cdd7b5a94. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ITK262500179 — a six-check JSON result.
Relaxing Lullabies for Babies: Peaceful Sleep Melodies with Ocean Sounds
Hushed Moments - Piano Lullaby with Ocean Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d6e95b302e9b1266c2ef86edb3e094ab1627e92d62f81034541a64b01d464. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITK262500188 — a six-check JSON result.
Baby Chopin: Essential Classical Music & Ocean Waves for Baby Sleep
Adieu to the Piano in F Major, Anh. No. 15 - Piano Lullaby Version with Ocean Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6599ba85c1fcb6cd81cc6877750fcc76a7d8a410446de6a8e7a662ec9f1e61f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ITK262500215 — a six-check JSON result.
Baby Chopin: Essential Classical Lullabies for Baby Sleep
Relaxing Piano Lullabies for Sleeping Babies: Calm and Gentle Bedtime Music
Bach for Baby: Essential Classical Lullabies and Ocean Waves
Baby Chopin: Essential Classical Lullabies and Ocean Waves
Soothing Lullabies with Ocean Waves: Peaceful Sleep Music for Calm Nights
Bach for Baby: Essential Classical Lullabies for Baby Sleep