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 0xac1e76f5556267b2f600ff52e69512a8325a4f9a55b9beb170ddfd67fca48ce2. 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/df7f408b-6725-47b2-84ba-494cc9c7fadf.json and https://artists.proofprofile.net/proofs/artist/df7f408b-6725-47b2-84ba-494cc9c7fadf.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 0x1010b99d4143c9df8e537edf0a6a603db318a7e37270cdc63ef1a46a8e865cb1. 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/QZHN62047246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9d5c30422d7139fd7cf579b52f1cedf7a0dee21f8ac05e7301c9484d42490c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZES82266338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5077358c503cf523163b9a900fe0477eb3963a6507e9bf6df8843edd865d5dc6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES82266342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfba064effe493377b321965bd3977d70794a00dd07ea6d72ca36512caded5a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82266343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceca31d8a437837d846a9900d6deaf68cc5b951c90f1314bc5a7b97ab785f21. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:17:55Z), 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/QZES82266344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc33b3155fc73cc3ee3d047ef5b19aa96bcfd61132398740e5c041b4cd0a1a26. 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/QZES82266345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc3b95b75af5c01a86cedae63709c8e09e6924027b9131b37e0ad002561a471. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:38:39Z), 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/QZDA52003940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb31b7a26323b15ecee239be5a48429673c46c443f9b94eb2b0fb3fd8d965ec. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES82263811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd904fdeeac4367467fe8930b8f12d0a672b10e20d01a628860ceb8174e1a29. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:44Z), 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/QZES92298118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8414545344d52fcdff9b481802151de6d2b1b8755568ed6001d50e6c8edc8d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:12Z), 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/QZES92298119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8333df17efb965bd901d13e85509ea700e334030dcb2068a4fc717a82aae0ec5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES92298120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912353fc31da5f430a5f423e7637078f7d2b295af0a0deb3cc180be4629c1e78. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZES92298124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecc75e080b6f2eb8d5ce7b41a65abbe3c014df1f9b4c2cb770e50880df61e7f. 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/QZHNB2291473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f515bb015c761880fff6cb9dcab8a6fbdd6b1a8e35885bf3863607fe3d028db. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2273021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef35aab1466eb63ad69646e37a65f56b4ba82e2aa96160da2003d2e294e34f. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTAZ2207322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47de362795ec2ed248421035831cc47ceb728300f65c1cdf11cc10d804695d6a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTB72245919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40cc9b973416c6a79e729407660d1dde02614ca0420b1a85096eb8a05bd02ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN62396209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad9d65215de83ef28d2af7a9402e77e178ecbbe7242f2db1db2f47e7957cf2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN62396210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419b05735102a71de3bebf7b1579095131d65342a66ebe993d94e18ffabdc224. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN62396211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477969f13cf39690cdcae9df243747735ef0b847bfbe77675a3ab103e7cffbf1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZMEM2392745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5a1d75d22cf25e3553e8ab137148dd873c0378f8cfcc0d0aae65b229dabea. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAZ2371123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c214dfcd48cb01aec6422647c55d94855c32e400fde5df64077833ae208963. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAZ2373539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6732618fb9b5e3811527f4497950845265dcddd55ac92442928c0b383cc70f98. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAZ2373540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7e9289786e5891932cadcb532d0098ac402ff66fdb87f5719b986f5a4851e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAZ2373542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd43a2fb3c588a4722f38028b559d2e71b1f4bad9bcb67be8d2c4910f5e33267. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2373543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dfcc513162c859cfbc3003e7df2b23cb1e73e984d5873c345d99516396aa57. 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/QZTAZ2373544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5e4b6c85835709c1c58b84fd94341f4d7780b117931f3043589419590de464. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:52:17Z), 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/QZWFJ2359641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c5987a12698d2af86860c46ee0f2893ca78b23fa7cd2a9ef9f391d0561654. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZHN42471599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8338c56d27bf851bf61676e2ac5cd8e9271ee79630e8cae5ff2c7dc0375bdab3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:07Z), 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/QZFZ72473649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8af81cf73a2774d22f461fabbf1005b3be7b26dcf95bf3ca921f2f654ea415. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFJ2498462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c85734fcee716f6b59ebff20cfe499c862e44f85ea7106f3267b23066175a83. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFJ2498463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d55f014502c316e0b1651e7652d06d9821e66994f9c2d1488de098d5d0db4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFJ2498466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb4e1ba343eb78be7cc49a3102ccb0f6f4fd0d4f24384501f8f6dabfd3098c6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFJ2498467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc37ce4b773dfd2c44d7edbf7d5fa06c4690d30f0c22ee0dd8547f1467b0f3. 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/QZWFJ2498468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9631f6c4423500fb15d2939a0c6a2f2f5c42f020d3f75ca61dcc0c345ba95d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:04:56Z), 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/QZWFJ2498469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb385ac5a36ab6d355cd6e64b66e7a2070d029a34ec3500f8994777736d658. 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/QZWFJ2498470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05d8b8c3b53c09622375cf643afdaa229aa3e839b43bf63a72b635648306c5a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFJ2498471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d31ca9f1195b51775ee90b7f5df617f6196c03a868b0308bb58f44db34e99. 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/QZHN82066730.