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 0xb64ea5c79d20be2f78d1d52a9133ff2194714052f8d9a1e2c0127b808a85b050. 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/030b9e98-4aa6-4944-af57-d699933306e3.json and https://artists.proofprofile.net/proofs/artist/030b9e98-4aa6-4944-af57-d699933306e3.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 0x9e4dfd0fc3bb577aac9c7acd6381248495dda092b71210373683c599b81b9cf5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:40Z), 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/QZ5AB1925031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b124d65d09c25664027aa763b8c4cafcf2150435d65b35c94ec89f937f5050. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5AB1925033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca6022100bd87baa8e3f9c4c0950c9d41daaccac55715b82dee0dc01c73963. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/US7VG1916020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025cbd7a7474ba2e97e8c9015698ecb6d66c9ef15e9d44465c783c7050a0476b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:31Z), 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/US7VG1916025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ba307799725708c3e5ccbbba4f5be98e0313d89796f49cbab555f4b8b46244. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US7VG1916027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f469c4eecdd2daaa2612807a734a8c32116a8ee1d72462f0c991937a09ecdc. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US7VG1916029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37002fb29864601a74a640c5ffd0630fb4a8697b049b797019fb63f0cb27ec31. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USY282010690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb231cc45a71b5bfcd7fbdda97c6d29c70e6e22caca980470addf1c4ddfbec0. 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/USCGH2235735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55fd47d0748cdf2e6ba93e06d5444ee7dc577c088c2945f5bfdb8e8e657e13. 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/USCGH2235736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36fa08719eb7476972db5b0772e748128b2f8c630a88cd40798e3d3b8fdbad4. 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/USCGH2235737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33390d5fb5292d9477c7d83466e1bd5de6b33caecc0792c2281edb1df1c65635. 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/USCGH2235738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d93787b1d393049a590a9eb42ad0e2ec56fa5d501c960a475db2797a1ee5d2. 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/USCGH2235740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b105ee0968ef820772c1f74716c7dd326a75b4283b4b21c9b4a7abc8ee9160. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH2235741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191ddcb1e355ce48abbd80d49d15ebcf7d1b272908437404fe5b151d20bb93a. 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/USCGH2235742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77bd45b98e6ac4bcfeca8f393efd9cc7cb1b8b89058501220ea6d8ce77b0cc7. 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/USDY42356348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63fcc164506924dfbe35c77f9d5439ba2fef31949d037d48613f38550e26455. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USL4Q2322868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07147a620b2d197a22eb3e294f8d8235c76115b91328f1e66b5b9892a3c9dd7d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:12Z), 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/USL4Q2322869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac080343f9bcc85beb770c3e96f8776c0d88badfbaa31053e20e8210200c18a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:01:22Z), 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/GX53U2401169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71684013673fb8cf0c7842ca9bb519196d4e00fe7a9ee7edf315b5a19be73d53. 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/GX53U2412477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bff377af9c7f33a2a266406197d9d0f031c5c0385d5130445ce74302fb97cd. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:47:00Z), 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/QM6N22295341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe98cddd9ce4371ef844506e116eb34d0e4d3f854ac85e9c95373d21822b634a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR59R2162744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74a5d97f39776fe5e72ec42d268eeca2e3e286e30aba8743c53e50b5cd39a2. 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/MXUM72201212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74a5d97f39776fe5e72ec42d268eeca2e3e286e30aba8743c53e50b5cd39a2. 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/MXUM72201212.