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 0x2be97d719e0b7e142a20b075ec1e1310de03403a598d1caa96738bd1900479ff. 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/3c43ad06-2a7f-4842-8126-5824d3d99652.json and https://artists.proofprofile.net/proofs/artist/3c43ad06-2a7f-4842-8126-5824d3d99652.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 0x5557947d6f7efe92af52f4d3aeba8df3f6bc1a31dd19aff41420b89a546fa50d. 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/FR96X2202666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6730436d7e194e7a5201db3403d452dae2e3dc5a91b26dfa21b10c138f8a435. 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/FR96X2202667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234490c7088144254fa681991c1d932d7339a3add71105e13951ad113e17d37. 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/FR96X2202669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4bc7812bb97f38f7826a7fa281890154088c6b91f647827bf30e71602a9e5. 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/FR96X2202670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47446bc4ab5047d94a3755b69b2921233c4040b82a5ede97f1b53ead965d39. 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/FR96X2202672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2afa32101b752bcb8950d71ed698f122a87072defdb31edbb5eb2216e49a3. 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/FR96X2202668.
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 0xa0254e9c3cd65f503e097e114242ca8ca78196ba1b2a355fd092e8c394dc1d4f. 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/FR96X2202671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa76fddacca930375bec2c014c4954d5994d8d3cfc9d6856c5d76f25a0e3486. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR96X2202673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d272ee700abd1ddb0259803f34be2cf1185b3de3c00643f5450b547736a8ef5. 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/FR96X2024411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71de7afdf37514edb98142387de981e93df949482f2c6dc9679f074a18c9ea7. 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/FR96X2024412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd943e0e49abadc752ba05b6f8d080d374d448728bf9fa283e592c7a7846cc50b. 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/FR96X2024413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65f1a5b0a05f63cd1ab7e19459b27cc26c6866ec4fad254e4ec32c79455732. 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/FR96X2024414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f02aacf782c9cbfbeb43025288f1dd7f6e26a865f7dc19c2cdbed28378a95. 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/FR96X2024415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd4d51d3bb7695a65ec19c94da603c8b8e638a4dafb3c64342c83964d254628. 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/FR96X2024416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45625ba30e6fcd04d3d8f0e360381bea4cac6c3cb5ac7f470b6d459da0fb7ceb. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/FR96X2024417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d8667e8ae785ef3e11236cb175d695eef0ea4fecf225518816acb3387fb2bb. 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/FR96X1946514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10641ff32c42e3c3997934aacf64f1676e69256945344f649ed0fb381b28fb16. 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/FR96X1946515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e50fd108dece0a39ebb927be0f90e5a637746cb951aa064d4138b6d8e922b. 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/FR96X1946516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc72f48e441c9954339da076c6508e3e7f642c897b15cd3fd78fbda22ba7136. 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/FR96X1946517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d13f82bfacd791a8f8d761cc654591e16182257fdb513f6a8afbc06f93956a. 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/FR96X1946518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df7a767c982d2a8c3425269241283d6ee37c6a1983d11b5f325ccba2b2cb890. 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/FR96X1946519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8dabe95bc0e04d108bfec053e6a8475d054ffc548823fdfab97e34c1b15af8. 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/FRX872039618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69200d9ab7638a429fd13045d3e70a1de812f9540ba2f34b2bc9a2af48e662b. 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/FRX872039620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8533d77b794113ed973a720cf39ba9c35089c245b0c15b7e0e515a762664f077. 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/FRX872039622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff6a3add5a98988322e3b879b2f7adaadbacbf223940e5297028e8c0e753ad6. 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/FRX872039624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa5de69248996907a956182d474af2d96730f5b19ac8ddfb341c5c955907a8c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX872039623.