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 0x57ff25a32caaca944b34af87ee04123867ceef4813813ec6ed6116b6b7e4c3dd. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9530549-deb6-4ae5-9ee5-326d6b85e7b2.json and https://artists.proofprofile.net/proofs/artist/f9530549-deb6-4ae5-9ee5-326d6b85e7b2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aba2aabbf554d554821b55f9ef97375cbfab70afd4ec0550f3eb4c3e440895. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2186227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c1f532bf7b1efca5c7819fe950c6171357a3c0f7308bb94e771f56b3337dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2186230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a5eb7af2539c5fcde99d69ee12c0551e4b0eca04a331cee22a903d8e8daf6a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USL4Q2186224.
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
Mele Hoʻopulapula, Vol. 2 (A Tribute to Prince Jonah Kūhiō Kalanianaʻole)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f3cafb0f90f35214f9f33130b3acaa4bb711773cc64ce45017cd2c7a19875. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:59:11Z), 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/USHM22365618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26f8eef3878801ef96a57c838795a959f5216b6ddd2726ddaaa0a9b3be5bf1f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22365622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb00568e9454d5a2fdf86f97a91d8ecbd61bf356b9030fc8659f92bdcc0368. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM22365628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85f7c2ddec50beab38f306eeeb013e39d9dbc0e5deea1590459cd9a54063f29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91944398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966332fb6f88565a4fac5639aa4cf2357962efecc1b449a1c30396b4023e4a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1d3baff67c4983656658a5d34794f8a0d5640ead51b4ced6125983a974fcf9. 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/USHM91944400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc09dcbebc0f277c1dd4bf3673459b4290373fdd80d3afb8941ea175c9a4ff8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91944402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad6cb8b8d8820f10969b1f2f49207d2c6e7631337afe0546d9f483527f291bc. 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/USHM91944403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4798643ad7f7cbd46d088e806599b78a038c44bafbf76aa56017eb24b05ee545. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM91944404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048798827add1704a1653c87db08973b689eeb52045cc0e739b8ba6a0bf67456. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91944405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2becc2182fc62aa63f1cc157ca47b92390e2cc43a97406aadf5ab1b8308dcf1d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM91944407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c7930ab31f18d100bf736886ce21f1140e172a2a4c72b1d7b1a3b3bed4d3df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM91944409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2db205e46ea8f0ce43346b542d438857ebe877fe0904e7fa3c29576b8557ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91944412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07f5a02243e1b168a46aef69562f73c070f779ed4bcf1b9ef914fd3ba467b3. 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/USHM91944413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8439de7336da38d7cf107da72c846be9d6042da27ff0e49e5bd2a306390c8cbe. 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/USHM91944414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4e36e2ab849e008029f47cd4ab5acf8b5ecf626bab91d1ec1a7e6285053790. 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/USHM91944415.
2011 Midwest Clinic: 'Iolani School Orchestra