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 0x22a2f4d4f8e78319643500d8886ecb513322e8660615fa0749e41609d91130c0. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce4b962-ba2f-4a88-8d97-8fa8d02da379.json and https://artists.proofprofile.net/proofs/artist/1ce4b962-ba2f-4a88-8d97-8fa8d02da379.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 0x0017f0ae39a6556818677ee2a92ac0f9dd725928bbfc93fccbe9f173448f943d. 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/TWAN79220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a11c5f5286d6108cb92ee3be99daba837be56daaa22592e419d4e313a84bcc1. 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/TWAN79220008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e9243e39ad05755e750dca6d0ac9d859e04edd092fa81bc5c134aafba14a2. 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/TWAN79220009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc239a2e9565c6f99537453a41790f01c0faa3fec66c508a701fdace345e59a28. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAN79220010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983aace23055d24da788ea19293f8f8f62d8bf531a7ac6733280ee5ec001d0c. 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/TWAN79120002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2e40c6edee36b327c1e4d3e541704ae22310a56048407deda5ca9dd7bc208. 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/TWAN79120003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84777478cc5536f3b5a187d9456b954f3669bd6a129dc51620f0fde4ee4c57d9. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TWAN79120004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32daa748127507ff1d7e50d27419f40ec09d50d1c5eea17a80d76b711bd6b77a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAN79120008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e19675f1408480c7c8241bf1aff65bbca2eccdee6fd3234f2c41fb4ba2c7236. 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/TWAN70760017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4560db3433604b75ebf0e64ecea96a5c889d086029686337d202075428cf5e5. 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/TWAN70760022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eba01bcc1d41ca60af94aa47328412e029aa0692c0c7dae813be6524ce0a909. 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/TWAN70760023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886d3e46c67bf084e93502914a406c444facc0fee9525bdd8cf9285dfe05c702. 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/TWAN70760024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77a5c6ee911eb9a1314af6aab5362c4599aee1d9e0f644e29ee0ce15be24ac. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWAN70760020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc124e0c9c4feb129f0e52ff4523c692cb7ddd2e7149fb49e5f2bede2819fc091. 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/TWAN78670015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7254b92276981006401743155810630ad80d3c3ca44efc9c080f7868918f201. 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/TWAN78670017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb2319350b5675aa81ced33c373a2ebacdf70a1653d2810f5e5194a85ea03e7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAN78670019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde24537ae14de0d1507272226fcdcb632c3ff7bae042b639e1faf971cef6cea. 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/TWAN78620021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3454bf21c3ea4847b78695934225236927149d0b544db02b7a72bd3b684fd7a6. 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/TWAN78620024.