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 0xdcc23ff11b249ec27eeacdea4a0a340153fa4c0f42d3f2e200da61bb0fdc856d. 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/c9958600-1667-4499-affb-68f34c4c121a.json and https://artists.proofprofile.net/proofs/artist/c9958600-1667-4499-affb-68f34c4c121a.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 0x2bb94d926609791d7a0083bdf0f04b51a3621d37e6627512574c5321fac99693. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHR2380216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c3c4f7b56efae36d112c1002b03b8c49615416858d01968636cded79afeeaa. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAGZ2361915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72884a36eacf3a7571351f3dad7890f69600ae521cf7ceffeb23453a72d98e80. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZEB2487318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda536b23bee5a17795d6b23afa5f5dda0859a92cc5bfe29127d160dc0fb128fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN2550880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda536b23bee5a17795d6b23afa5f5dda0859a92cc5bfe29127d160dc0fb128fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5FN2550880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc16268c16d3b940de2bae9d94dcb97d7810bc4f15c165b8a0f68bc899791f90. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBRKQ2517913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c99de9ccfe165222fdb84d9fbf9cc3100d0d86c3d675d3df598304e785641d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBRKQ2575346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f07c5060aaa3525a1888c660a8ae8b6a50c90995ff8ba923fdfa0ce6f17c08. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:00Z), 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/TCAJK2563298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fdd82214adc2daad7565ae30b178df8cd7a96ef618e8bccd9d101f7baa2b64. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJK2580665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9280d4a1fe1a0dfe9f02295dba4e1bf9c1092d914e2517da0f123d33c1af0bf. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAJQ2532795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029ccc48974f3f70413eaee6acea06fc55da05d9e228e3dcad118b1560d6f04. 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/TCAJR2592490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda536b23bee5a17795d6b23afa5f5dda0859a92cc5bfe29127d160dc0fb128fc. 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/QZ5FN2550880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031279a84f147163175d575ee8b7cefe55227ec2450b9ef0917e3ae121eac94b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAKA2512555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70c545ecaa99c3219522865fdc24f6a2bae9bed6dd1496bfcf52808cb0ce9dd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:17Z), 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/QT65X2512033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba3addc49e7c3aa694053755682b02118d9aa8fa6975a32224dc5e272880145. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT65X2587695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0a5ca688693c8f2812ec9ea6187e7fd35433ad6ed5e622dbd6b15d6aa5f197. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT65Z2566339.