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 0x900b9617e4b6e97cf8d48f04aac713abf2d87b1f01451f928624f0d970e286ec. 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/7d85e26e-b918-411e-b915-9c04bcdba6b1.json and https://artists.proofprofile.net/proofs/artist/7d85e26e-b918-411e-b915-9c04bcdba6b1.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 0x6a1784397008882789450f7db7b33e3fb8884554c4fd792ed1aa08a5c25e3bc7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZB4J1863481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ff285981a8a29c56b8929b267f474a98fcd4d6c996c8008abb3a60331103c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYW2074601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80847b95343e6698e9ede5267ea8786e5cdfa5b6478c64645f33114e2e73dc9f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES62036321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9c8bab1d89a798f0a928a6e1afdee7f639f4f550b0abd85077231e6d6bda8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA51997416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6e3b7e0fa09ef1d9463e4ac85faa38161417fe07414059e303cc63167854df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES62036323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7503485dbea31400ba8a0335099256af820dcd04c33fc964dc471bdde9983796. 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/QZES62036325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92e5b142c546a08b88ba26098affee361ebf2518f6c2850c74e8470392899c0. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZFZ72025112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7bce55db5d1811cc1250ecdd55455efb45fcf566ecc7f4dc2c910ed79f2ac7. 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/QZES62036326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e341b3b9ba2d14ab388cfc55aff77e39b2ab6df7b7e2956b10e89515c62d3b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES62036322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5376d44a3efcc2e6813c55044389e54b94c130a7185009618e3dee1efc3beeb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZES62036324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858904bd17a39fb70ae9af0c1e4df574ab404bf21c3aab5e808ac29e68313663. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZK6P1980324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1d83f06a498767ad3a8579838640473d6ed28ec5190b79796d100c46ad86a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES62036327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41feaa35fd702989e44e7451719a0d07a3c85c6324cb4059fbc45545f2db234f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:04Z), 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/QZNWW2019353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa32bddf1b190a47497bfa7ecf743980d118f0cdc20c8b98940f873817304dc. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTAZ2287920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae1a246879af7a3c24fd882efdc12ed5ab0b343b772ce2d13ee4a3c00a8bd2a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72396536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f05ff0eb4da51690170bd28cc4c31cba4bc352a2523da23d1f323054e53180b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEM2333095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b88cc958b42d1e79e5788d7a7cb16cc7dba545065254289a5133403e84007. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFE2381814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd909019c53f10511ad8ae663d7b63176158f4c05188b60d59f6410f598c8b5bd. 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/QZ6K41701258.