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 0xd2990d288d97745e65bb84f1d9ad9894fab674d8f482cf83b8f64cd89ca03042. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6107237e-58e0-4d91-af5d-299989100d14.json and https://artists.proofprofile.net/proofs/artist/6107237e-58e0-4d91-af5d-299989100d14.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 0x7c6a9956ea036de26c972801910d4f6546d04b96165ff797b06deab33025cb43. 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/US7VG1708112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c174f5702106f689ad1afb8d2cf9ceb2dc58a462872fb22cf07043663a755d6. 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/QZ5AB1634713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4234e299a6500331bdabd8a589095ed5aa8398c6566fd5f053fe0a623aced8. 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/QZ5AB1634718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031528a67263c1a093b028db7e6162a90e8b6b52a604be8764817f5c242ce35c. 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/QZ5AB1634722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e45c259ceb18e918711f6c1b388f75c3066a3c964d1034e8636b2c90371ad7. 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/QZ5AB1634724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40fba0925f7d0007d1aeea774a87a8cc8ede49a348c06f12729c652163e164. 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/QZ5AB1634726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e09eba18e5d411f1fe41411191ddc060fa338596d894b986575f89ab01080. 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/QZ5AB1634734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31283258c7b844f3a8111f55764b407c908149f2903a2796f37417bf4f654e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZ5AB1634714.
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 0xc41f07535d0d7c0987e2c93086c349146ab47a3198e6c770e9b973d5e9e0a5bb. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZ5AB1634715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ce4a39999eea858e3af651cf38409b5b9487cfa5bdf7df74d5fa128f365f8c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ5AB1634721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c004b4ac3cb9f490df9198dedbbcac68eea943baab096f3ba4836ecf3e4ebd3. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZ5AB1634729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b4bed4861fd14433121a8398a8204bca2e8a636ff121e2f458e4195a6cf51. 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/TCACK1521277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a69fdf51ceb67a66f4f4d1efec593c55dbb7c93ee42671cdf991f48c45eed6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCACK1521261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1cf6492ce61fa4fac91cecaac39e74d8fbe9b195a259cecb392293ffb232b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLM1988966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d06b715d6609df34e0ec4e3c89ed552631c52d34fea1ee62409fdd69f4b41bd. 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/QZ5AB1647227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903d60e35e4d9f32a9bfcee724f81370cbe3d9103b92d62eaeafd5ae8925ce3. 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/QZ5AB1647229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48cd239afaf6ffbfa6759e58f37bd29ffa31a080878613e64e73ef0ffc84726. 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/QZ5AB1647235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba64a0e2d5e3e6ffc7f158ac1fde980543fbed0f4e1cc4e422d154031c70280. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB1647239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff936ef8fba0f6210968b2945fe1afd419e617a15c42c03f42f901be7359f49. 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/QZ5AB1647241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a97a7de02190af7dad00c6a058d69abc684ee07dd98694acd43606ac9e275. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ5AB1647230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c02f9c5848aa6c8893a534b4a682591e5740ae8f12fd95f0cc4babb1e81c3. 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/GX4R52162670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead070b05e5598d75d8fec5142545bac492676929b62f7787b902b2bc078ffa. 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/GX4R52162704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb2f867f11a90d2f5bc6ba2108f386808f2d719897b969a7bff3eb0bf6ffe5. 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/GX4R52162706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7a0842fb1f50809141d4351bf118579b89246c9f66a37d50f5ffeba50d01c. 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/GX4R52162800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc58f75ce85a68ff262a6f0ed148b52065a70f1e514f98ff96cefb8901a1bcf. 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/USCGH1746621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4b74068bc684f513df1326f63c9dc1e1f352c9d85323d20c2d01b837a90634. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6Q2285984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1c49f58ade56ffb43bf9a57d64a19fe6b628a7e43e6d53ff8e855ce02a5de. 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/QZK6Q2285985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e09521937ab3cd451a158d6412deb4d1af109c30719e41e19181c1b6e2af9. 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/QZTVM2308962.