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 0xbc7ba4331d6962d1cd19b12b9002ef79f31f6a7faedc5d50b4a15033b5df7390. 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/4a5dbecc-86c8-4413-ae10-036c60a6521f.json and https://artists.proofprofile.net/proofs/artist/4a5dbecc-86c8-4413-ae10-036c60a6521f.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 0xa2ab96e84215e8cf7390c88e252644405d0d0d6c077882653c6412ef2c53a469. 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/TCADA1751855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ad8a7f928554506fb58699fedfe6e001d6b56741deb2eb227248cb0967c59. 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/TCADA1751866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e74f7400a589fafee6840fba56266d41ca19254a64fcdad3638f23deedd5d9. 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/TCADA1752459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16efc2ce44cf6b455c7ee2f962faa12975b4636b5df85f3d2e38f96cabe63a81. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADA1752463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cbd6c6c812597a65ef64f736bded4d30c2e053e583aeb7e54596691c053f78. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCADA1752465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea778222218e3b59e515b6819be930b8adeace42a3fee5b471be2f7ad5058e8. 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/TCADA1752476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb44713d5b8477b145a006d23b6e77d12862a7f9eb04340c70ade24846e61746. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:32:03Z), 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/TCADA1752482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ff31f00d42592b9cd282b6d13df1ded014c56c128d7cb1ea0c9c1765c4698. 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/TCADA1752489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f11126e608ee922e2b0ddae794d26d764fe1e9533b9e40ec5d5499a19394b1b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCADA1752490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e3bf458c8fb7ba269ad361a62e08c524fc1d02fe9a0b506dc6086094a71119. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADA1752491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62e4711fb8e7ca3846741828583aa334381d33b98c22cffbb34b642ac9fbfe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCADM1819733.
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