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 0x58d00a2934793e5d73371d93161005fe27d6734807a3692d44a53e8a1927c9ec. 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/22e9292d-4913-4471-a947-253c4f46dcbc.json and https://artists.proofprofile.net/proofs/artist/22e9292d-4913-4471-a947-253c4f46dcbc.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 0x391131dfbce7e04a1479d86275dcf3fff02d67956a3149890bb6248d7ea79854. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:30Z), 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/QZANL1705576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc602a0acd2ec6ca88a39e6a4271ccb8b1dc4636a019cdfa0273e261c942419a4. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZANL1788674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7516647a4019febb0355f4f6828e73c1cdb4086d1735617534c440d17d468. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ72134274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b0345bd7c2a2e4a5ca695b8352a3d9b585515cc8e58240c502d6d0fbbf514. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN42283036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4abe54ee0fc55edbe556d537a04e3e43aab17a89ad46dce31f6d0c29d894ca8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q2244532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f6edbc5d6f0d2b2e09614a410eeffaee1f0616f8c0b211f5cb812f278972ff. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:32Z), 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/QZMEQ2246259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4abe54ee0fc55edbe556d537a04e3e43aab17a89ad46dce31f6d0c29d894ca8. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/QZK6Q2244532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40b0345bd7c2a2e4a5ca695b8352a3d9b585515cc8e58240c502d6d0fbbf514. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZHN42283036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e65524fcefca73e706931b2c9254344f8e9bce1e2c6080bec5968bc44c4de. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:55Z), 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/QZK6J2205649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7832e74c31a0356fe27ca4556b76eaef13a7150a24b52acb8afe903cc54d6d0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWU2223100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7516647a4019febb0355f4f6828e73c1cdb4086d1735617534c440d17d468. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ72134274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f6edbc5d6f0d2b2e09614a410eeffaee1f0616f8c0b211f5cb812f278972ff. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMEQ2246259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e15e4f9fb62ea17f020c073f0fcb5acd85920613fde67fa4b705a14abd636. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6MZ2425110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b190cada4f43ff8fa7565b8deb83d24454452ef6980f76a7172463bbc9f5cb2. 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/QMDA62428286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e15e4f9fb62ea17f020c073f0fcb5acd85920613fde67fa4b705a14abd636. 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/QM6MZ2425110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e4536ae6c55305c8e0fb3f3ecb73d47dafe04ff198ce5013d26a10574f131. 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/QM4TX2463564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e4536ae6c55305c8e0fb3f3ecb73d47dafe04ff198ce5013d26a10574f131. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2463564.