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 0xfac9adbedd3e1d417895161c50982969a5e64f9c80ff3e8891c178037e9bcad5. 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/f07ed2ba-7b9d-44d5-a3d6-5dba00b5baa0.json and https://artists.proofprofile.net/proofs/artist/f07ed2ba-7b9d-44d5-a3d6-5dba00b5baa0.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 0x86f8754c824a0a02e1997262d2ac140bfecec8c63715466c043561ea86660a64. 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/GBKPL1934898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97098a0b50a4a7a2e950c87b38199c9e382ffa3d132a1fefb97e2180584ac3c4. 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/GBKPL1812602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4cb7ce837da7ddcca33e5d76e76259c133836ee26bc71731f1586e9023a49f. 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/GBKPL1819738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3a29993780fbda3898ba5a563bee6de24a5749556c210727be73621fc62b4. 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/QZFZ72001535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cceb21b8da62a157ef94b9c087af61c28266c4cb554d8791b9c6980d07166b3. 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/GBKPL1826554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6252805aa9f49a399fd9ccbec12aa13a8e8b92ed9bf3e3a5cebfdc88e8b1ab9. 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/QZFZ22005329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634bf90a947d7056033f1ee435f3b26ae86ca9aa329d7240251da9005831f88. 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/US7VG1993459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc68a822062ba99b26730fd1aba3f8c2dbdba4ca49e9355319772e5477b94896. 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/QZHN61922086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce7fca78ac7cfcb0d97873a535537b273fe2c84e70409554decafd017aaebaf. 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/QZ22S2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1eb5dbe0ce906ef946d5973afc7baf1d6bc1c19fbae176495fa89126797e5. 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/QZ47A2100802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954c137c8bea936631106b3d44daccf46eda65b85433e1fd1f8bae3e4aeb113. 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/QZDA82163606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6f5c6fa592acbf89e42ea7e1df0fd729591615140889d8c64c77988410ce03. 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/QZAKB2124325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295cc53fd6120481f13c49cc0960afc3630320205d9746714406799a76904aaa. 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/QZ47A2100804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b949826d7f3cd24b11f44fcd3cd7c6a15883775fd3ffed11f23174e1925b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ47A2200810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50bb090f2184783e53655f7e4e51f7d98413b6b12dbadda656cce4085d44a33. 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/QZ47A2200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1eb5dbe0ce906ef946d5973afc7baf1d6bc1c19fbae176495fa89126797e5. 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/QZ47A2100802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2f10eef1958e8e47ba8dcc44a59be75983dfabf3245c23fa2cef9c06864d0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZ47A2200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c058155a70d21aa1a4f1f5a10ceda2403e7edad20930105c2617a43a38754ee. 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/QZ47A2200808.