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 0x128259c68e05b9ea1897f9af76a20d54e5648ee5766d0c161062867bfa7f942c. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf0a6b2-cf6c-478a-b657-3814845500b2.json and https://artists.proofprofile.net/proofs/artist/fdf0a6b2-cf6c-478a-b657-3814845500b2.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 0x7354b06d17fa77bf94762dc5096c023ca0f86f45448b83d5dea79b2d26b61fb7. 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/QZTB32547765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44848eca56f298929eaf1e48385b6322fd1c90eb69de4d809af6b8b8d0d6936b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:24Z), 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/QZTB32547766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c4d77880f1760cff5a4059ebdff2718bf3ba4cb1b9a33c1f76f56da9e47f3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTB32547767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f81383af132d0e081934afb71cfb40224c2f59f69742d585fdb542131fc0a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:08Z), 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/QZTB32547768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac21e0f1174c5f3359a3b53b5598fc83ad16babdbad8dc4756cf3664435fe2d. 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/QZTB32547769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f95cdcfb007f082d50b9e71093b4712bd5ec80695adae0af2b46ec3559195af. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:45Z), 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/QZTB32547770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25afd25916c86bc1c05e0f240d2a0d81fabc9ad779df6f7c0644e48113dbcacd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB32547771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec945021f118e9971756982576df937e1fb64319d81d03595933de28962c39. 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/QZTB32547772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3332755568c9c2cdc9c8d4b69500028daa2daea638f1b664db5cbe936f3e509. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:16Z), 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/QZTB32547773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8fc8005062401a92bd1d5099d0d01361f45593cf2ebd58088461741c0d0d2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB32547774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b1797446de62f09c6d11550cb68dd1dc33cae3cb440f568ef60ae185986462. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTB32547775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29811d5e295e2ecf0e280e9d5ad1dcd76c19ff203f41f9f1204fb1aa2ab120dc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:33:33Z), 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/QZTB32547776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9481ef0b64238bff5677d73d1576b00bf93f50a200362f5faff1f1bd8440b36a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB32547777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fa9836550007610bb262d0ea49341bb077524e720c44dd06b0869e4ab0a03a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:26Z), 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/QZTB32547778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447bf6c91daa50bd2cf2180a0fbdb042c08197d476d0f6cb118a33b6af00bb7b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJJ2510705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f3764746146585cfe00ba87c88366e5595c7ffb895515fb5cc5a52da0f3bc. 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/TCAJJ2510709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ff424f917ac0fd40cc3c9dedd71fff8f6ad88681c3d4c183c869a0e689eaa. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJJ2510718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1232d84c9e9ebf6fd5298a1ebb6daa0629cd6bc2531dced7930790d6f2d05b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJK2510719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c00fa93f894fe5f1c990ffccd943126875cb11deb98b5d70df1ea156deccd55. 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/TCAJJ2510722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694362aaf465790efcb699f535819c4be2a15d4dbf1b333a723c3fa1f0693c41. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:09Z), 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/TCAJJ2510725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ef27d2152b86f7893adbfe7f7c7c73e7aa8d16c48fc6b26c981e09041dcbc8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJJ2510727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e889e790c144ae93e1b0692a4b10e3e07b1569cd75c340429004d1475d85dd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJJ2510734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458abd886ffa3cd1fa28fa8d6d3eed19036fd53b27ebfd9ba3c1f0d5a023c389. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAJJ2510738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ab81549103905826afa26281c4db685d27c48c82f0890f77e359349f417cb3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:57:37Z), 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/TCAJJ2510741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed2326b8f8ef05fbc4d9b848513f443f1a66c57ccd092d7e5efcddb2f839723. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJJ2510746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3847e21f2c5c113822c042daf63601fc538e30203d44d71b78922587fd242c14. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAJJ2510751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fea8932a801611fd5184eff5f935717816510102ddde3fe4e80da80eeb8c22. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJJ2510756.