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 0xccb6760daac58a6d6368e4c52b910162cdbb0dfd4c990a073e48c37ab4423eaf. 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/95f4bb49-72fa-4738-b134-7da81bd214ae.json and https://artists.proofprofile.net/proofs/artist/95f4bb49-72fa-4738-b134-7da81bd214ae.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 0x0d4b72cc0e88ebcaec2bea3d4967ba864d213f0bf09458357af8d88982f9ace1. 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/QZTB62499472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f2595d46cf419223e2afb99512a2f2a7a3517c6ca51e9af5461568e861c8e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB62499475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092f6c9561d5ac2b09b8d7e6912d65e5b8fd8490f6facde91e30f8a4a3239374. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB62499477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fc000e98215e494c62ebe7f0ff31f4f44d9f83ecf88dc5d0bd2b960c5fefe6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB62499478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7db7630091731ab2ed2c52bb2c26178fdc311e55cd883486ef7cdf71d9791b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTB62499479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190c06dc726d340d7f83e59e89dd26139d9e96ba3280d43410bdb57a8c3f35a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTB62499481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd79e05f6d9a5a3cd4a6007dff26555cc2dd581e81a4c0ede3c854c22f0ab4e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB72488675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0a2557cbb28d5ea73cc4d2db37972200c5f498bba33d1d1cc1ccd612cbd43. 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/QZTB82461631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748be4d813bfd4aff2c2fef37383609b1da01ca56287580162e46ddc32dc5549. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB82461633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153cf38a53c7a56dfef70853dcf3d5fc7e94bb2ff4500bea67dbb518291372d8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB82461638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afa6b42524da84c511663a6710d16c2d9b8203c003a349d2caf8abcfd3e996c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:52Z), 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/QZTB72485678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fa5fb5c0762edffe81eba92aa0f5c9875e60986c49a8772b486097fe3b39be. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:44:08Z), 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/QZTB72485685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401d05e82230d21c5eedbe73df8279c140fd614d50b460f6efc2700a18cdc242. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTB92435526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f21a888c21893a87ab8a10f3eccd5a53acc384a2933cd74c69101932e79300a. 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/QZWFE2479538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8cb92ddffb5bda06231d5c9d473a7c29625ded03e8f82368578744948a084d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFJ2436280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e045f8c31c144950125e6c14c5aa21d6c6392b1cf49ee579ec101c2571fd7ab. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZWFT2431743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816cb29dc58c107407a3ab2baef1021093c08afe4f17eec32dfec82712ff8a1f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFT2431752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dd9dd0ac60d3f025ae049a23baa83d65fe68fb0e07a028486e92dd2312558d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFU2499076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b503bd94fcfa3ad6e9ba62f1f581c83eaac64531a0f70cd4e9b5d5cb1e252. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFU2499078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22dfe3ae741fb906d4e11c322ed3212d6ddcf01f030d50489ec3139d6854e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFU2499105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab62e02b3075d0218f17912c208c0dccb3070da4a32e172c60683df782ef91. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:57:21Z), 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/QZZ782483996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d19478f24a39a122c537982ad74ea161370da7d225a36c54e1cb1fb2ed24674. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7R2488129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da5b5534d542f6c581ef319078d4c0aed36ea33e80282f21e9dd8a568a216e. 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/QT3F22499788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e8bd716f24fc01601aa4d26115f899cf3c52ab6df57f5d1128600758df2187. 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/QZHN62563812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c8973a2da979465b7dafcdefb7ad72716b1fea6ee288a8a04090d8120d769. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZK6L2545544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286f7372d3a171867376e50ddf375430b1cfc6b95b924cf0b0afa60893e428e0. 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/QZNWV2596002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726fe83edc9ad2835f2281ea0b718bea66ee85dfe6f9ca64404eb3b8f1dcc03a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWV2596004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd2d1b1177d3d5cc1a69a9eba34358720f70ed379c47d9bd5772b9bf16460b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB62562066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc311a0bec08e59db93287ac0fd7a3a808ad4b5dc2de214818afe9afb10d9d8b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:45Z), 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/QT3EX2511927.