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 0x005ce6dcc0efe33f49170d0f72606f8aafee60aba588f40f0352c886462fcbe9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f07d422-94fa-438a-939d-7a0d3b9b9837.json and https://artists.proofprofile.net/proofs/artist/8f07d422-94fa-438a-939d-7a0d3b9b9837.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 0x780526d2502dccbef875acbc7fc910be459da4e63f4b78e9f415866e3612c5fb. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/IEDRC1000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d1d7d2a4766b4266c38e68ef5f274c2307a96d0e8362290b390f4ffe1cbf14. 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/IEDRC1000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8174ecfa9913963a682b950fab68004115aee31933100092267a0dc63d844. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/IEDRC1000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff8ca7eb981108cb76ba58e9914f2db2592d9b49207db83407f4cc0bfde2cc3. 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/QZFZ32321993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2af85034bfcc8df5d098d4b2397703f36f4ce947e7ad4c513fee9f345244d2d. 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/QZFZ32321994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e438f64199f6069fdf18fa7eae8261533ee4451c7f2907b33a176f648bdc07. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32321995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16425f92c28447e2a6186f67a31d1f7d65ab55f3ae7086eae76f233bb3372bb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFZ32321996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf39a560f631e7e110e17ad2f8e75814a1d46fa486587680518f767b3f8f8a93. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ32321997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca995ee4c6cee08b732ffb6713a57037cb461084646676643eae2928ab8eb12c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USEZ61616402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ca32956688468598c1fd4ebe24c4aec2715fd282be16deb24a2921b3bc693. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEZ61616404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e3ba3338a21cb70ec28900e3e8bdb9a8e79732e34c45b79f0e277344b2830. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USEZ61616405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df4ca0a37bdf6a613764e9bfbf7848e2d0cd3ebe4f89ad0d6a5c55996f67e18. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/USEZ61616406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1fe31b911a4110bb6975edf6fe8b1226bfa8836a70ae71aa3420b62857ec01. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USEZ61616407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584977e260bb1c1605fccd0e6517331823afe9cca197a829e0b49144b39fe7e3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USEZ61616408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6bb2bd0e54eaa651859ae56851c3668c9b5c9c2747b24fb58f313f49e986fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USEZ61616409.