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 0xac8b5df134fb57ae17a47123b5dae7a2920614df799babae66af318275bfaeb9. 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/cae23d01-796a-4cae-9304-66d8431047f1.json and https://artists.proofprofile.net/proofs/artist/cae23d01-796a-4cae-9304-66d8431047f1.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 0x98f3a1aa36d3af756dbd3f2ea440a3f0be0d4c1c2edf903ab036bc133f39c379. 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/QZ5FN2259296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a83ea5e12c4b08e5e417d5210827fa6331019af2c1c88f46c096573f4e5aad. 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/QZ5FN2259299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a24e3dacece50faef4afae51fff5effb3569080812b33c25742b22e9251adcb. 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/QZ5FN2259300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed8d905c1d90586554d9c135863bb7828d050f91cc27dfa4731570ae02e1d46. 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/QZ5FN2259301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e59d607f5acd69a845782e07388bcc171c4e35034364f7eaf986b8994ad60b. 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/QZ5FN2259304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd935c3033a729b7d3b39f0e188c65925090d3dbb02f7ee4ca190327df44d5a54. 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/QZ5FN2259246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431b511e51b43430cad8a9033ea05cb999d076aafb1fe82886a913c728154b5e. 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/QZ5FN2259247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77301c78e072ab813bac642e1892bb38fe1a40661bbffb0531b7fd8b241db45. 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/QZ5FN2259248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb4cb8b632bbef41030443ab541d164dbc8da19556b84dedbfa8a8a61125ed. 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/USLZJ2102970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85582efed67cf0c2a10361f8f211d0debbb25878924c520c0c8b6d68e212a7b. 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/USLZJ2030084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df420f1ca2764b10b84582cfe7f89f4f4cce18f8138d44f74b318648d6c459. 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/USLZJ2030045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24526b7fe09bf03d5b80cdcd8209d8a46616ef850c450a03cc842975563eea83. 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/USLZJ2030046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6852d905f9055282877fd076cd88dc1a4d63966f45e2b12864358d656155c2f. 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/USLZJ2030050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37bb427dca4619769bffcfc1a194f03b46b20655d8f48eed11a43d4cd74757c. 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/USLZJ2030053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d8bd847a56a55481a03a2e6da034370265dbb4fb457d13c9c4d93d0b150d02. 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/GBWUL2028085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ef0b83366adb5543e5491af85e0fc00c2af66b43f9b78e60c89d38b50f32e. 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/GBWUL2028087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbd74f519b81b8d7abb97bf3cc886edf00e915b65b997cffae42d84375e839a. 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/QZ5FN1807902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fbbf06f2a974ed9a02b66b8010fd2dd28d072dc9b36b75f121acb3b2eae4a7. 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/QZ5FN1807896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512521af39c8fba99330fabda29aabffd95955c64f95452f099f77bb463d4fd. 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/QM5LC1700720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7affa1e5845c2357d29a24b49e825477e568669aface067029258ef6387204. 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/USLZJ1742731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66baa6d72110f1b557d0f9dfe25f65163f2bdf9d48b33cd6ac4da81cf50bb7. 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/USLZJ1742734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86f991b1a308ecec3e9bc501ff77be4b39227fb37297e338dc9af14b287580a. 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/USLZJ1631156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb012fc34a09cb0d13b1e8f48f45a4469cbf2f0c51d23a0901a3c602cc0f0d133. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USLZJ1631158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb87c09f4d0d158b59ea2d7aaf9489ee185a98b0d9b5a28a1dcd81ce6bd0b63. 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/USLZJ1631160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d7ee0f8cc0966c836cc65b6c743c39d316a176362a069361df384e182f05f. 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/QZWV32455771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592bb0a86e8a6e4bb6ab6a2c65d287cdb29ddbd768711acfbd49f375151b3d78. 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/QZTV32417806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aca7429cb52b33ca91505e0d06ace71b5505e2bf4cac1539e93dff07b92a008. 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/QZTRX2475581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f1c0b3e851e7c40aa834547b75f2849367045efff5a5b89612351788df2345. 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/QZWV32376465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e05031c440f6fd1c01789960eb0a57af5f2ec43b72ed1b71b284fe8a243cead. 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/QZWDD2366265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58024e16a235624b1590960ff7dd8dcf3605c5bf09f45b4d36f25ddbdcb7830c. 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/GBRKQ2382626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a2c7b8be029c985ee3295e0f344251b9380bfbc8e76ea502cddc6c460aa45d. 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/QZWDD2268140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95e82fc49f46ed0dc32b6a745a5112964fc3beca914b642e2179c1749a7425e. 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/QZWDD2248321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c238098bed4c975ae73f96415488da09405a5308dae4f367615de725c7a553. 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/GBWUL2239246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10a8edfee71eeb23b88ef31688705d03dcde857d477daadc36206fbf839b54. 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/GBWUL2215583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9973f310306613e436fd8478e7e95da3b08b7e866b25d11d271c66c79da60a9. 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/GBWUL2215585.