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 0x0e1f88e0ba5e19c842367fc74fe2d127725b5c4f8a7de2f54c9becedb9854c13. 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/6c130741-146d-4d68-a99b-62ad84eac065.json and https://artists.proofprofile.net/proofs/artist/6c130741-146d-4d68-a99b-62ad84eac065.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 0x810a9168c8c40ef5ff1a916cf4ce532f88e09f9164100cd95e7f7782b34c8d5c. 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/QZHZ32007496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0513ec6e9ff945b3810c811e9b6556a536813c20ca45865b687093d7e7c1e43b. 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/QZHZ32068408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cddd8b1c20e09b06f093dc2480bbb20d160bd47bf7473d13e76d2dece7e469c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:08Z), 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/QZMZ92201223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10430fa91c1f9476e74053e679af3ece4d56bbe6114e2a55b3c843eea5faf8c2. 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/QZNJY2272999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf302615a449897a64f3a362a8609c3d16b07179efd6bf91cb43aa4333b4109b. 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/QZNJZ2282659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b02d58432ab6d49db5e29318634a29ad24f407e158d8c31bc7ab437935441. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9L2235165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf091399af0376939a76a5e4a7aa7801c35cd2b12e5da9256859b32bd9afcfef4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZW9M2227275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5a06f9c6718997c2fb01e705331a013023eacab23e3262c631355c08137297. 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/US7VG2331342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e8c1248172da8384305f2d867111bdb8ced197a3c43f57af5a11cc91e2956. 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/QZNJV2322301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf900679059a77066cecc76e0766d10dad1934937c8d8c8ce8d3bd97303ab39c5. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:20Z), 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/QZNJY2359008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17e196d6bd51d4c4a33edb22a23eddc225ea77daf564a856ffe483fe9446e3a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2307907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b5625671c61afa546a8f79feec1800388781bc27291a1487a986ffcb2cbde. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZW9L2394341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d7371275d448e138764e0f4231e190ea7c86c605f04c0f51785dff5fe222b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US7VG2433143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34796ee834b81af7a83bbffa2a87f88c072f2e245be2f3961cfe043d73bad280. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:48Z), 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/QZTPX2433013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c52c1ba3b63ac2cd5f5b6dd7e0c169eb81a03e3259b8a8bae6f1b5d878f467. 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/QZTVM2477677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72212c3ac88ce823dd102e5acab72961ee5a5783432f12c4f793ca0ae570a995. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9L2427396.