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 0x794257a9e195ccf913b475eb675448c7262777a949616ea025080bc5fe6fdd90. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd40823-0837-4995-82c9-bf27898dfd3a.json and https://artists.proofprofile.net/proofs/artist/edd40823-0837-4995-82c9-bf27898dfd3a.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 0x4b4c5804841782ac3c4e06352d2e5df23ee365ba214c9a56db7126f993c18a3c. 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/AUGBT2304817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b3eccf1e03d34f2a04bcfbe5afe3c157db98aa3d08aac14850c21614641a6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US3DF2420053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d215059cb9a19e9ffa21037f3b2076f369309db4d5f0984e83f29d64489984. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:29:40Z), 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/US3DF2448387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad65f74819c64e167271ae315c421167f30e420daf4ac7033d2496eb37182a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:28:11Z), 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/US3DF2471091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e75466f32f61600e996f6317ea03d972cdd23f1a67bd71681978780b64355d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USANG2411905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1a38fb25e98b125540dbd95b9bf6b4f25b6f5307cd7464f534e24fccaace45. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:49:44Z), 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/US3DF2498664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ade72932afb5ad53859ac203b375e4c608f2c0f3cc7faddd4bc57e9049336. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2471793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeff395caae88c2fb4c66a1a88373bbf2d7c20f13cec8419d63451e262ec98b3. 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/USANG2465774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140263d283a041547bf7062f5a87ca251c56fbdc59ea09b3a32a4ecd4750f26. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USANG2485499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eefe5a949e1d21e518ad5ec774d56ab2cc36e8fd9a692d4f8fcdd4d3761048b. 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/AUGBT2332197.