Pinkfong (; RR: pingkeupong) is an English-language South Korean children's educational brand of The Pinkfong Company (previously known as Smart Study and Smart Books Media), a South Korean educationa
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 0x15cba15f1dc7cbc6a8bd7e4f05543de10f7d2de2af2a1f48137bc6a5562fae2b. 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/a1120eb9-f913-4ebd-8065-a05ffcf128d7.json and https://artists.proofprofile.net/proofs/artist/a1120eb9-f913-4ebd-8065-a05ffcf128d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc4d5ad0445726f58f2ecd3d366906ea340bd9a3a0eb477a876f4f692bfa78ed2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRE671700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec186c78627843d11834579a36f2ef0559703b061d87f3c94b11be2ebde38053. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c540b716f55c51719884c49c05b2e631362611898831361d4a41164e5e9b131. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614dad4a1d0ad7db958cc84c07713ea9b8dd082c0d72df6d2efa438ced9e10f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936bcbb257a625a90fde7f56bb7aa24fc4bd6a500bd5fa81b72c02bc2d0bc85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4355c564ebdc913600567f6cb733462d50658423435fcfd970f072bfd0e8b8f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee413a27f1aa1fe6c016a1b179ab7ad2df615841bbcd4c9e5f0f0010231989. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRE671700066.
Pinkfong & Baby Shark's Zombie Halloween
Pinkfong & Baby Shark's Space Adventure Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aed890530d5e760aa97cc3ea4e03db847db5c678a5a9e61fdb59c0669aa82a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRE671700071.
Keep Swimmin' Through x Baby Shark (Dance Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254d6c6cef278f6bb55e556e3f0b5014dba92ece0d1b5f00fe703a934f0dc01b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMF2316204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cab5430e092f21f87f704c021be76673704dba1d19a372e6bb9838e4fed788. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMF2305576.
Can You Smell It in the Air? It's Fishmas!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43599d30daefd1605771297f79b16f792000b4abace4b0943f4ea9cd8928cc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9e36973c44bfd869ea6b8c004266714f3d730d4886d068d195e4414b82606. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFME2068263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8474cb1b2f5d9c0e71b549fa9ef47eafb68f8a4415f0892e009dcc8862ab2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME2068264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332455e77ca693e9e1e0ca5b5e29ca00bdcc605b7cb1b70b095f3b040c0f90b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2068269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43599d30daefd1605771297f79b16f792000b4abace4b0943f4ea9cd8928cc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2068256.
Baby Shark's Big Show! Fin-shaking Dance Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf02eeca9d9ebc962af294c94bfd45d97a9c0e05cd177894cdb00c317d959762. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42348590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5924601c42d506d9541d238f03a3343678f18b487cae773f0aceaeaab7e8772. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42348591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7651930ad7da38fce2ad7818b6569934ae427bf17187f0db11fdc694947eba44. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42348592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b843ee30cf124fe589589fac077c7d8bbeabc106008dbf30c516526f97b6ac9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42348593.