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 0x1416af97378886e8866cb85e33d3e5a40e79262212019b235d2387f8dffea1cc. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d73a71ff-7c16-48b6-8c56-170526bab1f2.json and https://artists.proofprofile.net/proofs/artist/d73a71ff-7c16-48b6-8c56-170526bab1f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Best Favourites Children'S Songs Vol.1
Sing A Song Series (1 Nursery Rhymes & Children Songs)
Sing A Song Series-3 (Nursery Rhymes & Children Songs)
Happy Children's Song Selection (TO THE ZOO)
Sing A Song Series-1 (Nursery Rhymes & Children Songs)
Sing A Song Series (5 Nursery Rhymes & Children Songs)
Sing A Song Vol.4 (Nursery Rhymes & Children Songs)
Sing A Song Series (2 Nursery Rhymes & Children Songs)
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 0x504a2e112c85046ded1837942278cb8f10563a90f476b7c08185bbac2c1b6218. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUS12223235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8de400ba473b8fac905a77be2e31efef5520c29bbebe7708db832024fc25c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MYUS12223667.
Sing A Song Series (3 Nursery Rhymes & Children Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e870db83bfa99e6e80fc89b82124e83a3a9191cf7efdb687e7603237b664f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUS12223213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aad1550bbbf765021b7c76b062c6f4b6617046f594ffc5523d585ddd08458f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MYUS12224741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a130ba51a618431d0644ff3422b16682b155b577219417bff75623036e7d6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/MYUS12223053.
Sing A Song Vol.5 (Nursery Rhymes & Children Songs)
The Best Favourites Children'S Songs Vol.2
Sing A Song Series-2 (Nursery Rhymes & Children Songs)
儿童汉语拼音入门 (齐听齐学。讲标准华语)
Sing A Song Series (4 Nursery Rhymes & Children Songs)