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 0x0c93e5ff7506abf3b3e28a8799ea3c89926bb5047b52deda089e353de86dbc32. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f466880-9505-438b-8354-68cd9b9fbc09.json and https://artists.proofprofile.net/proofs/artist/4f466880-9505-438b-8354-68cd9b9fbc09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
See You Again - Songs for Preschools (Ak Version)
Music Circle Time - Songs for Preschoolers
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 0x2e3f1d20177d8d47ff097b1eed1bdd98a883d9206fe0ded358208b75561bdd78. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201982213.
My Singapore Soundtrack (Songs for Preschools)
Singapore Folk Collection (Songs For Preschools)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6035d16418470c1112ae5737c3a743e1a80289e61ae4ce9dc7d72b8980dec474. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452016206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6146dc89493c9096c0d3c996ccd2dd94af52b7b5ba1be412605930507c9346. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452016208.
Dayung Sampan - Folk Songs For Preschoolers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204f5e4ae5b5472907fdd3c050ea2855d1ecc331262174a4237307cb03646c4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452016211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f32b258fbd4ac5e3f000e72dcf2b100e8204bed2ca5b478e1c993e68e6b07d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452016214.
A Ram Sam Sam (Folk Songs For Preschoolers)
Shake Until We Stop (Songs for Preschools)
Simply Kodaly (Songs for the Music Classroom)
Playtime Melodies (Timeless Tunes for Little Learners)