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 0x04596ce50013a68cb8385df404eaa2b184d96614960c64e6430721e42b42bc7f. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/159002e8-38bf-479b-955f-37e4ab980032.json and https://artists.proofprofile.net/proofs/artist/159002e8-38bf-479b-955f-37e4ab980032.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 0x1e4f71c808bfc617cb374b3e648d24ef38f0bd61f252be7764e3d8bd33ef67bb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA092595018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4965c40960d957a5c68759367845b036a525343eba81e755f6f7ef06032cd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:54Z), 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/ESA092595022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69f90dec0e06fcb77a9c806ff0304e90e4f8d125c0613deb0cff65b8954129. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ESA092595017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4f71c808bfc617cb374b3e648d24ef38f0bd61f252be7764e3d8bd33ef67bb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ESA092595018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3454b1968e28b00d1b340a1206963dbbf149390f672a0c8080426f58b31e6ec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESA092295540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952253b8551e8079a652c7cc066cc866a3b1c9b5855ea2f925108782c8cf2843. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ESA092595019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025c9e2e3ee2122882c6cce4992801d651dfdf708e66fd887c88249579abf6e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:08Z), 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/ESA092595020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4965c40960d957a5c68759367845b036a525343eba81e755f6f7ef06032cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA092595022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6e70b29b04ee83b10131288005c0364ccbe575c55669652d5ae9ba50918aa. 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/ESA092595023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3762ac2dc77793a24ff76390cab14208deadc28520bd329a13b194ad60c4cc0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA092595024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd165ce2e6bb556e91104e294d3fda98334ef15aa052e8e85d888a8e72eeff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ESA092595025.