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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 0x009dd0b7b5b41ba27d8cb17c94a2c45c7ef5674a88ef887386fb85b0921a03c1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb6c9257-2f0b-44b8-93b0-f1c8ff092ece.json and https://artists.proofprofile.net/proofs/artist/eb6c9257-2f0b-44b8-93b0-f1c8ff092ece.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 0x7053eb3716e39c7519c00fbb3a24ae7b107fcc2cfcb057bcc6a5fc7a493b645a. 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/CZA232300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67831e10d435982ae85ab84a5c0c7a4bc94b6e833ea7490522b5179dd6c3e55f. 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/CZA232300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa155791f6c723d453795213e517ff326ccfd12d5f6e8a4a9a2b649e7e6746f. 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/CZA232300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2741b43b27373d05f840f1362bd1e2a23da74d1abcde6c4e30da306b2c700d9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CZA232300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b6b7d84b310cec15719302e4aaea9a319e5ea42bd8a642741e2d53cb654cb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CZA232300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f804526a64d7d111c2745e5a69280c0e531320dac1c8b39eb426e6debb8df4. 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/CZA232300713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c18dbf6f7ada0325273a41ecab959d1526b59285d65d1bb69a3bf7f533d8a7c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:49:55Z), 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/CZA232300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b1c37b62a333d6219b6202d11c9c225c5cb637be09a946a7784e72b52d6ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA232300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f085a47c1a40cf622d93566bf2496d31216349f0349100eeffa5b22cc12eb. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/CZA232300710.
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 0xf72d1dcc7dbfcce4f30b6ff8a070cb24c51ad00e2dd4b0fa6a225d4110c3a9e5. 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/CZA232300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b892e6c678c82b8749687440c0358089fc0cd87c87c76b024487f13131e0b5d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CZA232300717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61d0992197be1fdbcfdad6723ed92c525f51cd7725c038795ea008e3fcd692b. 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/CZA232300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58d6544cea6ec210434bef968023f3774f2d13f1a68ea76dd24c4ce1cf4afb8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA232300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386cfd1b59516d50132388c9412d98b0358c85e85a53a9d94e537f7f0330cbaa. 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/CZA232300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f61f23d58cbd55fb3a9bb69eedb125af6bcb15b2bf008ae016460824b4bdef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb280e66a3cfbbf690363296d955e94694016bbe46a2584a9855692fb240b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA232300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e2f0b09eadf535ffe4dfbb38d048a98373cd98d14ceb09d4a9f608bd11455. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2064f953aaf9d64a8e28de8fc128032a18807998f4991b7f282da93453a3f8c2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA232300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f1f8239d89800d9eb00501ef006bf6a482f64f9561a006194baa8d97c41b9. 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/CZA232300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8579277234388118448f376807a07de429bb11fae1df1c7e7dbdea281dba7c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA232300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad011f1b5b44b45fe13f29b334749303a6e5e060f8c12a3304258b3cbbaef6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CZA232300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad36db5581e3cc9833a75b2fa40aafaa71b4bc3d15a9e94f7059294a11b29a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA232300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0110ffd11cbb12d31be3661c9c03509c739a078a77869689d04525abe8aa2. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CZA232300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa86664b269c7f4c6de4ee75c30a05e394a25b77b79e197acaebdc7f1d35aa89. 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/CZA232300063.