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 0x100a386b2150510e7be134cde79b92175824bf5c01fd4c448e79b08460b09033. 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/8c7de72e-7ab0-4bdb-98aa-ff4e8e6fb670.json and https://artists.proofprofile.net/proofs/artist/8c7de72e-7ab0-4bdb-98aa-ff4e8e6fb670.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 0x3d24332b0e2f488ea842af62a480df7e30226e2b95b0a76acd43250014611af0. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:37Z), 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/FR59R2340916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb9b56a037b9fc9d0b5990d2494af0c9469d70fdf036033f83f387baa1a393. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UKTFV2301032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a13ba8a5eff4c4ac30b82245c52e45862314f9d648c06f0185d9cad7cc9835. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2255569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6526f58701cccf03ab8332975371f7684314b43ed09d258b3f5ac561096e2a56. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/UKZGC2303891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c5b667503b1bd7d9f1280b29ac73e0d4d28cf13c47befb576214ff1ba9b26. 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/UKZGC2304121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb1b6aa6003184eb3c099c161968c6c71d3a65cfeebf728504cfc90cf5b75a2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:05Z), 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/QM3DF2256156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c959c53bf1b7c4aeef37d75194aa3c098303a0263298dcf945f5873674ad64. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:56:20Z), 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/QMANG2216732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c95d1272193fa55286b95825989c3dd1feb55aa43b8402e3dda96aafec5949. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UKZGC2308221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf65ecf85cab5470f7afcdfc989119dd6da36a553e0803e3bb7a7cde8a21b5f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USANG2448756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be8844e24557e155d656000504be0b7086ad05fe7fe9b453aa81277be56bd8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US3DF2463838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35db2ec231aa8411b3343bf23f32690f48332f99b5476e9b1a12a964d711e60d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM3DF2270047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1498767ece20bf6fa7c53553ce1a536c067fcfcf179eb049cdde9cc914db9ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM3DF2278317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a13ba8a5eff4c4ac30b82245c52e45862314f9d648c06f0185d9cad7cc9835. 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/QM3DF2255569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35db2ec231aa8411b3343bf23f32690f48332f99b5476e9b1a12a964d711e60d. 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/QM3DF2270047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b8f419f1b3704c704518da85d53c431d09a1d4f8b905240e35dfebb94f63af. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKZGC2303867.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a57a49038eb5c3435748e182ba13738f01d12e0c6a3e75085b40cfc1766ca37. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE6SA2389069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f461b64abf4681f1def36793cf3e374b55b6d0d0cf7072571f339f18705a218. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UKZGC2309227.