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 0xc1c94d06ec11f0b1d86d5743ca9e272ed8054838dcd006622eaa21ea030ad7f3. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/561958be-c5b2-4100-a7df-90ab6034e870.json and https://artists.proofprofile.net/proofs/artist/561958be-c5b2-4100-a7df-90ab6034e870.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 0xcb23cc3e133f5f0b6698d5fbe1090391d93acf22733ae56fefcdb44ecfca6aa3. 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/USA2P2206797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f161faa7f8bec21f6ee6a795406782cf7f102ae1ba100cc9a62dd7c5bf07247. 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/USA2P2228138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71329ab27222b7f7c108ba7d1a23be470a35a51a8fbb18ca3064e8345f2b5a22. 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/USA2P2228128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6ab1f3829a725d90c3c3f023f8724be05fbead2aeedcfd10d692f3606ef16. 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/USA2P2228144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0cf920b7a56ff0dd553e3c6320d1738087288a65c2af11eec9e9754681de1. 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/USA2P2228047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7968decf9f40c968421b8855b3d7fa5e6695c0799913a7d72925927ba2c5b9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA2P2228048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6855b164a7b73a5991d38f9ae107fa72b0a08b9f0ed032bbc9f86601e5143d2c. 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/USA2P2228135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ed5ce2442a0ff39afa99f1e2edfd520cadd2eff96e772e8353f2d040ca975a. 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/USA2P2228045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8942679502476e45bb382f78d29b5111386a1fc89df1aabd2d292d6b4aa06d9c. 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/USA2P2203519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf812511f3573a7732f4581fadefc8014f2b538f710a2f996026783dd5da3f9ec. 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/DK92S1703401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a418eab9601de9c1180cad9c2ae7ef54fa7790dcb1a8befdffa70e96d157b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DK92S1702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ca57389c5d871393165fc02bdd95e9cde1f90aa7298d793ffe3a594cbef51. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DK92A1702604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced7c01257895bffce6a07251740b1f3b76f3a0432a3b485cc34bf45d104fd5c. 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/DK92A1702606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886336771d3a15b8de2f97ca64b2721e9e03d7846bc85594edf6b87e79d0f19d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DK92S1702001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5c94627e7e71d3f42b29f228869cc58789432c8edcab242a27be244ca0e6a3. 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/DK92A1702607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5a0da0f982da89eafba7e75e1a46436ced50ce20042b56288e201bb41df0ab. 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/DK92A1702610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a427ad2733b02416cbcaadd17271714071d7c23d0eb789dc69fb9da8926ef3b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DK92S1703701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7f615fea2708f754af6d63f9ca5125c8d54d1079f5769ba5a69d57ef6678a. 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/DK92A1702615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75641fe79f0cfffdb71587895e875a31c98ae1353709823ebaff1d6073f57f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DK92A1702608.
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 0x98625f2657acea9b7254f73988d1969b04ce9ad61bab7abfb3bf5f1575f346fb. 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/DKBR21502105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142f38c1ecbd5ae30d5274799e60c82da117684346387d1b108315d4b1d1575. 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/DKBR21502111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0b58957d967672ba76cd7a0d47cf48f87727366dbf2dab951a0e44dce61179. 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/DKBR21502112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ff042f140c7dc90da8b87fc454dcc2fd48ed9891be18d6af22db66bbf4f84b. 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/QMBZ92297538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513f475f4d32d8482eda26733f2ebd87937f4dde9e62517672fc2493e4c5589f. 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/DKJG52203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f4fbb3d98f22dbc04feb0187bf4d45e295ae7a8ee47ffed375befa0289255b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA62219142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6668f7d559b07ed6f51b1d0173895b1557f6f5a47e290aa42cdf89254d9544ad. 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/DKJG52203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900848c04504d66ec7495c50ebd02e3337f4a2ce1536d966dc1e5840bb7ac1ec. 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/DKJG52203011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbbd7099aaa592efbc00744e20094f65e622bc524e63cc58a2c6cf8572f2fa1. 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/GBLPF0139503.