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 0xd7579426d3627ede1b7ecb60d1c90dfcb0431e588c2150c84599afef24838929. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a47fb5a-23ff-480f-a421-40281b5a8f3f.json and https://artists.proofprofile.net/proofs/artist/8a47fb5a-23ff-480f-a421-40281b5a8f3f.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 0x8ab34d9d92301a1f309c56944a5839e5db7806eb01cc27dc655e166a7db12e4c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USCGH1832362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26add9af463ddae679d12839657d1df474db622d45c9dca559541de7532df57. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGH1832365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e4dedca73c7e1ea8c27f998cf86dcc445ca2d39fcd0f979b34bc1ec000494a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:02:23Z), 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/USCGH1832367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698c227aa39a392ba3731d185c39f8a8ca63cf194264787d54f6dede1e19987. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USCGH1832368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a932edaaaa59a63ca08256bf50b1c04043febaeb141ad14a2414d62bb24bf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH1832369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d45e627a92fefb96e2069836ade1f270007769488aa553fd508e91d4b0d76. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCGH1832370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b007be0f0d68c817e6bf3cb24e938c214d3693ac6e7270e59871a237589f062. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USCGH1832372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96e4cd2eb4be794b7bdb9d507f336121d3b4ebe1996683d579c7d8631c62bf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:30Z), 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/USCGH1832373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f043f158a998eb18ecf34cde5807c013306823337f4253331c3df3aea55103. 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/USCGH1832376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7c052ba908ed37133f7b2bcb2e3418a4a1f46d2b5046e37b8c031f3d148c1. 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/QZFYX2060992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4244b778d3ef6b437de1ff4d4b08dae558ebf3071b3d57c2096ea7c0ce7812. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:06Z), 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/QZK6H2008300.