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 0x2aba3a2dd5eeae3b99349a815d3066d0cd1ea2c1d361855737ea74901cf3be72. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bfdebd0-f623-4dad-b406-e0d16a65244a.json and https://artists.proofprofile.net/proofs/artist/8bfdebd0-f623-4dad-b406-e0d16a65244a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xb9d0d75f3c39f1b34390bef10ce64771058ab7d44c7a2c49c1138829fa647c4c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF1715969 — a six-check JSON result.
Lullabies for Expecting Moms: Top 40 Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187fc661a24a87f94d3b804b9a560d605cfa647d9492a4dc686d5cee0ee5b58. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US3DF1938193 — a six-check JSON result.
...Baby One More Time (Music Box Lullaby Version)
Lullabies Go Pop (Peaceful Pop Songs for a Good Night's Sleep)
You'll Never Know (Jazz Lullaby Version)
Classic Piano Nursery Rhymes (Popular Children's Songs and Lullabies)
Twinkle Twinkle Little Star (Music Box Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f42a65634c8bc29d43259f59ee557c29ac855d247692bda134d583a1a3576. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2205558 — a six-check JSON result.
Happy Birthday To You (Lullaby Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d400b624a53d894717a1ddcb88bcb68b92f1ae2ea90ab1d807a5250da37909a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2207494 — a six-check JSON result.
Here, There and Everywhere (Music Box Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207feffb02e177a133e5d49b5f3656c203ef085353b4300c6ce6c6daa25e7a98. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2240401 — a six-check JSON result.
Somewhere In My Memory (Home Alone Theme Song) [Piano Lullaby Version]
Flying Theme from E.T. (Music Box Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dc78a6347dcf1c2ef94626d5c85e0b4e6b3b87c1972ba257d7e3224a279ae7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273418 — a six-check JSON result.
Top 40 Lullabies (Lullaby Pop Song Instrumentals from Past to Present)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef031d71d6aaa0901afeb0fe654126e2755e63c4de98b054acd8d031bdeec5d7. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2241189 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207feffb02e177a133e5d49b5f3656c203ef085353b4300c6ce6c6daa25e7a98. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2240401 — a six-check JSON result.
You've Got A Friend in Me (Piano Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacedecb90fa0d33f9dbb2cacff5393535755d6dd7901661e62363706ec12afb. 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/US3DF2501175 — a six-check JSON result.