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 0x3d99a142588b8ac18cb98c96035c0ff6e71d354c4f7cd751f579f59400b06618. 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/9a4dfca5-ceb4-4bfa-9ace-71e8df74e20b.json and https://artists.proofprofile.net/proofs/artist/9a4dfca5-ceb4-4bfa-9ace-71e8df74e20b.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 0x3c3ed427b4b0c7697df412264b84607ed715598cde4de1500ecd4dc37daed05c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFG2416074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1882f5e234a1111a32223be7197c01496815a1629366b2f49c3f19bedd427b9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFG2416077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d50fd11435311e893134952ec152be740f790a94ff15655684ac384d8bdb19. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:45Z), 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/QZWFG2416079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17646be5559b51852a0c6a8c29a0dc63b38018e9affc980046b51a640891742a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFG2416080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c80cb9e99c3ff18646116a79e5425ddfdea05579370c49fcc7795dbe45359c0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFG2416081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668cc93fbad9e74929d45525256223348accf7d640717a02d80a7c33ddeecfa5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ7K2419380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39c9364a6f0b32c06a4ad8e021ccbc99be8479b6c6842d0b79dea21f286c6aa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7K2419381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ae55b332cca5b5de1cf2a70067f1a4d1bb9fd7a8990d0fef4788edc809d3d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ7K2419382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d1752e08d560354932395a755cfe6e73e395f7b504d5053094a2e7f0d60eda. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7K2419383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e9114d03bfb89c5ad1f068aaa3f1e067707de29e92f05bbbb54d9ecb408e27. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7K2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41566b4f88dc0dc8cfdca9ca944dd0a18ff0ec399bd8126784449b031beaa694. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7K2419385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d32e8782fd40408155e8425f057708ab8de5633fdf4634b64484aefdcff133. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ792401382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f32316b257255349d60bdf39f0142ee25654d1a536361372d11175ec64420. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ792401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57873120066c76901872ea7e3f7dbf05a9edde6b4d099f53e558e59291939a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:12Z), 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/QZZ792401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec926dfdabd01c3a9a65b6db768adf3c54e13a7259878c026e9e385a4e32054c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ792401386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e518d53aa5cf35a30ed3442452864e8e759bf59c08c8ace43546fb97d9f061. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZZ792401387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019cdf192871f21f80340d22a08a04158152897003cfc9f445f694eb44294bf7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZZ792401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847b0c3be9e5b0ab7219b2eb234b0ea4417ed0cb2d5705338c785d7785ac3c64. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZHN62537102.