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 0x3139acea01f5f18f4b5e362e819907d0d283d6b604c063f9517a6779326871d1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdb99916-52a3-465c-bcbe-a52f9091eb30.json and https://artists.proofprofile.net/proofs/artist/fdb99916-52a3-465c-bcbe-a52f9091eb30.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 0xd59bbe685851f2ef43833fa209ea1a97858ea69acbbaf17555a160e01fba45a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R42455672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68c18bd7efb7d8dd5e40f41a028a07fe2f00c2d2ef6428f3cda5125eb4479b. 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/QZ7R42454928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f051d67cf54f5e3b84462c48bae994638a8d779259b32dd83c1cda88a99a7e8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2335725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d5c1e4e3b38d70b98fc1a292b35acb1dc9369ac29afee915362919a1f1f6b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2335728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a809dafccb0e4cdbfe272584b381a07020d7330c10668d9283b304e9f6a0fa9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91626146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a398fa423bf2fea84c42abe7688fdd3f76d82341879c0ebb76f00f133939c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM91626149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666fecc284ba028a2aad61fd84ab946417af8b6eddea3a534dc2fde8f651cb0d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USHM91626150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad568e45330b3d5e3c0dafc68a14804cf01fafc3094191844c4e988054f51798. 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/QZ7R42455841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70bab7016be69d97d6788f98e9f656d1599c22b941ec94b15725e8f992e2069. 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/QZ7R42455747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d76066709c174d88688a3105c31df53c48e4e77fca0c922c3bf897d713ad2. 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/QZ7R42455749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18774a308c85bdd6bc6cb6f936be5c5b1fa2cc8988358aae7383bf1e281d2058. 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/QZ7R42455752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c0a93e64e15e9d707c1c3b36f863e1766fb5e825b99d359d2435ad4d2a33bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R42455712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507ba863b448dd5e867469c705c9fb8c9883e1c9d7d0d9684dd2dba78ab5b3c. 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/QZ7R42455713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f25d555ab134fe56c4b337356aa658b938ef0b38538ed14efb2862e2f2659c. 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/QZ7R42455587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212749946b34e815d539eb09369a15d39faea01170c6de8dba44ae7fe11e3055. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R42455522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3488b73c61dfa6cc67b361dcb8e906225d0222462827751683fe1e134a1fa33. 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/QZ7R42455420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8759c83336c51f6d7dcdbcc4fa1dedd2c464fec98bbff4b4a557b576df7f64c0. 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/QZ7R42455111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13262e421cfafa017e3ec1c1dc75c8222bb2e74f1dc3e04426ce3889fa71bf49. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2313054.
AFROPERURBAN: Procesión en el Museo Nacional Afroperuano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd009e6d5f05539cf08fe5a1f6e8ee9fd7f85164b6bc211b45ec19520704df558. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:08:16Z), 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/QZNJY2277470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eb50f1838a0fb669bd88c763a91b5626ea9f156f0e57a1e29c639b6dd28f9a. 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/ES71G2222866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbed43b86b996acf2eaed947d230298dd05899bddae8439aa402332b1de43f30. 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/ES71G2121753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda9c36ac1949c0cfe5f814f28b948ea755ee5203ca0da6a5b49ce783d46774d. 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/US7VG2198050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81d2a278f80df0685808adcec00baa42854efabad2fc9c2858308f1ba7732e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB2164653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81d2a278f80df0685808adcec00baa42854efabad2fc9c2858308f1ba7732e7. 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/QZ5AB2164653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bc93fd44cae08ac3fcb9ca7ef00a16f5511a175fea9120af5456fa97639393. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2110840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea041095e2a19ab3b5a11433e3bdcbcabdb31165e22400991f8e68c2db1632. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJW2009041.