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 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 0x79928c9cb5545ab72206202e3175b2ac061a1d7943689dc8fe0de93b8a6db5c1. 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/e50f0729-d3e7-46d2-8f93-965abfa2faae.json and https://artists.proofprofile.net/proofs/artist/e50f0729-d3e7-46d2-8f93-965abfa2faae.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 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 0xfa010654bfb53f8a7660619fcf57bfeed38ab1f1121247ec4881b10c07e3725a. 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/FR96X2294173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5132c88e6aba6656f40a7ed4a9f413af90dbfc0b1f27499c37354fb92e672. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X2296710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6a7784f9e533a5c8deec7c5f5feaa0f464190cf00495e0507512a1ed832f33. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX282206560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77586b0c186bb9d8b9a0e115a9c21932877d5f48c6e513af3ff6db2a3ec37f7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX202302536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e177fb809435636f74735302980377d876819cb8252e57454f62c596950700. 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/DGA052352458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c4da4fbaa7c5acce26f3176825e0359bb2ac1fc167e29605b1abe7a43a996f. 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/CNZ632401642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709cb15a9836976a6e289ff0827e325dcd929cfb4be18253684ed8d19e1d58c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CNZ632401821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fcbb65efd7c4386fba4866efe56865ebf2a9322c0cc42cba1536f76513b49e. 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/CNZ632401823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709cb15a9836976a6e289ff0827e325dcd929cfb4be18253684ed8d19e1d58c. 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/CNZ632401821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ccb2653eff78e89cdc7ad4fc55266902d8b068854f70cbb852f894fbb5e37. 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/CNZ632401819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280a24d4d799caebb62c20c164090431eeee85664516cb0095b2fb80dceecc0. 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/CNZ632401841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeed6fa1db424210765af3331c6768267a51739ef32be72037200281007006df. 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/CNZ632401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eef7f4676bfcc0b29c86a3553ccf8b948e5969fd77a63f16c1844f29f32356. 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/CNZ632401820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e031be233eddcc04cca5db1aaad9dbfdd958889ca3647b8069e389fda5b3e8e. 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/CNZ632401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38ee965c079d2213475190f8543fcf0dea57011e6c85dfb3a05cb1d48c97917. 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/CNZ632401817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a8973f64b2f61949e8ffe01ab104ee8573cdea802dee61ebe5ee4f0d183b3. 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/CNZ632401829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875524d17805006fa5a8f67555b5d6a7e860db557839ba6bd698a0668eb70066. 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/CNZ632401846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1eab732b8dc9161beff1aa4bcc6da039e373c96dd399c71b78f54ff241c582. 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/CNZ632401831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a15449cbadabeabcd24dbac88d8e8ebd5c147cc424f8bf5d8bc3825ef590362. 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/CNZ632500007.