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 0xc9b7e4a4ce85ffc764a2a8f20366469284b0941785354c32660b695ad20cada6. 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/e975e381-7952-4c83-9cd2-0b090db09acb.json and https://artists.proofprofile.net/proofs/artist/e975e381-7952-4c83-9cd2-0b090db09acb.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 0xc8ce6fb6a03a46ec1572f9c6c7b6ae316688481f593fe3e45753572148b022d2. 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/QMFMF1467168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18688710b21b46ee71fe5ea2eec24b3b0852e10af1aeb21d39b3ab5857aaed7f. 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/QMFMF1467169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2567eda4724d736fe8ecbffb61cea9ca590b4887756933fdee5274df0018c2e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFMF1467170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fde4d413decf93fa650dceebbc258b9b80dfde796fc3ab1fd3b2f2786c2409. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QMFMF1467171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d8a6709a68e3cd379298868a50da3bb6a6e4d78256f8f752a54bac978a93d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1467172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcd16240c3501eb8dd3fc1e48218add4639782a7d9a4cc9dfbf1a43d580f4c6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMFMF1467173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b678194b315a5e3cbf0e916c6c0841bbdb8c1132c25b5369e45d514d11e4ef. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMFMF1467174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28e459f4f08bcbb19a428e4ce01057d4c306c319e2053756c69ccd7e01f68fb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMFMF1467175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aacd4f41307d7baa4e2020744c20292be007959c9ca7b8058d98824d9015de. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMFMF1467176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8506c51b77d50f203a3eb5c48085b8ad0cebb6756c047c1d005d01f8a9e97721. 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/QMFMF1467177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e1c0b1c3411f0dccf93b77a013d8f022a7712ba71dcc56ca18dc2499203b6b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM90723609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01abaca65257f04eb8b609d9601a0dcfabe7a7e553afce79e6e2552bba246488. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM90723611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67394004feabaa6e3270c0b7c4a7c279aec45e006ae83b1d8798817c88b71304. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM90723613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf5d84afe18371cb388daf9b288bca48272faa9e6804fb80d82382d6fdec8d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM90723614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd315550687a85c16e1f807d0282cf63a799d091de1544eb0fab2ff9acfd8b230. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM90723616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297bc73519e819416e4165283d1983881d2e9cc813e2542620c940ac7567b19c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM90723618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc1b31247eddfbad4a453942e1cf7527390b8857f9a435b39362a59093c9793. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QMFME1460164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a075b3b6ce53d12477bb64130978c5e81753ea71dbb40fcd6808f7143d86fe. 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/QMFME1460165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e185475310d5b29d2b1b15f1c6f2bab4fcba69f226a06369d1d1f7747cd25. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMFME1460166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a621beeef3894b3e60b3fa677c4aaf9a34a0c87ca0ccd8536412a8b8cc65c. 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/QMFME1460167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccee380a131c14ddd48056d3560dc88d67aa7b34492910c3facdb91da6db431. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMFME1460168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f6319e8dc61edae4b7a618ed3d5e56f612a267521eca429115a6f0f1e90d5. 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/QMFME1454553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0cc804feeaa94fc470d436ec623ad81f27573342dfc230958e3c6d71792c7a. 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/QMFME1454554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2d4260cd4d5e29da935ac65936736fa8d1cd03e65958ec47f2cc7d1979ad8. 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/QMFME1454555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f4b613d3a5714dd358de120f20e1913b4a45edc18cf5becb49b3cb2dba246. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME1454556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111c43635895b2948446067eff1a5a9423d09bddc32b2eb546bccae9e465b9f. 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/QMFME1454557.
2015 Texas Music Educators Association (TMEA): Garden Ridge Elementary Gator Choir [Live]