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 0x3511c5fcc01efb3458a49b8f2fa747d95e1c899f8160ad2f4f28fd3d2c3b55f4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db67b0ef-9549-4aee-9602-865783b2ec3a.json and https://artists.proofprofile.net/proofs/artist/db67b0ef-9549-4aee-9602-865783b2ec3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Traditional English Nursery Rhymes (Volume 1)
The Wheels On the Bus Go Round and Round
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 0x7d7fce3982e2622b7a586e0bf12f544975ee8798c8130afddaf95dc25abee5a1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81423242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702dc230ee78466763e7405c88e531f64de2aec0ebb34309142bf1fcd57e0c5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM81423244.
Incy Wincy Spider Climbed Up the Water Spout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ece5b63472f01e83b8487a9459a1376987c242f9443860d788532121ece9f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81423245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413f0750df4a2bff036d369b7b452141ef266cad7e7163d97b841f39324df90e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81423246.
Five Little Speckled Frogs Sat On a Speckled Log
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092b10b2ecf31f9ef25af650002fe721a35a716ea1aaa5db0b903be96bb212f0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81423248.
Traditional English Nursery Rhymes (Volume 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0479c47243e072f53834749a2cf759663ed24bd6032298574f42efb440812935. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:42:22Z), 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/USHM91459000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2f79b0d368592f0c1c9eab04270780cce4d659a2bdf909452bc2ce0acfc599. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:47Z), 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/USHM91459001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4544888cfeeb27ef838c9a5cbc39a793060e592c03e78ad40cc11fa86c45bdbb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM91459002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdfb31453d263fd87eeaec19f9b8fde9df63d599fc2268ee5c7bf23063fabac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM91459003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94dc1003e456dd2780ed81ee468861af446326ffb84a2426e9664475e4ba89. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM91459004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152070affa4f96d22c97b43874fce992799d2834ca61637c42d1313c68251e0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91459005.
Traditional English Nursery Rhymes, Vol. 1 (Karaoke)
Traditional English Nursery Rhymes, Vol. 2 (Karaoke)
Traditional English Nursery Rhymes, Vol. 3
Traditional English Nursery Rhymes, Vol. 4
Hickory Dickory Dock the Mouse Ran up the Clock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23778b28ec18455a59e26371702e753ff112f35552a337bd60252ccbdf527427. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGH1676911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b9b891983da051f927ae3a44553a2a7d982c11caa364daf57608469fa5d67. 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/USCGH1676914.
Jack and Jill Went up the Hill to Fetch a Pail of Water
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf908c10280e43caf8419bf1c2f35d08f366bf06b5e037cb8d1b6ee92df09fa5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGH1676915.
Traditional English Nursery Rhymes, Vol 5
Traditional English Nursery Rhymes, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2b9ff5711d6b994de8cd5540809add7d2b41ab05df475d1cb1d520a31d4335. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH1924127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570e07ce45b739160d473e35a0594513dcfd594eac4785d7f735bbb3e65d25d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1907290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df21a37aea9c341f849883a100b628742d9b638107f843f943db6723f7a5e68. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH1907291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fbdae7588923893bf18e5606eb40599a834105e42c8fe55cd17098fd002495. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:08Z), 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/USCGH1907294.
Traditional English Nursery Rhymes, Vol 9
Traditional English Nursery Rhymes, Vol. 8
Traditional English Nursery Rhymes, Vol. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca54cbd0576baf60077739cafdac92e8436ce68eedc5386fde6caa840e3d10. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:50:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1958315.
Traditional English Nursery Rhymes Vol 10
Traditional English Nursery Rhymes Volume 11