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 0xea4b49e682088c2fcd7bf1a1b2701a95e9e2fa51f34cc2b1ce7819a60ce14652. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa05fa3b-f6b3-4b80-8756-6d9825ee5413.json and https://artists.proofprofile.net/proofs/artist/fa05fa3b-f6b3-4b80-8756-6d9825ee5413.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 0x03e39ff360c111d11a0bc09aa6a7f37459565c8e3c9d9e3c2ed75db7dc419e80. 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/HKG732280332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf07ed5abd9bb8622f083dd600533a3e212e30d2bb711d5b6a3b7f1a5722f90. 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/HKG732280334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12830f4e552f3b9ab136a8c1d58d7c0b0f8842a63e51d54df67f13f79f371e96. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/HKG732280336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445d38a572a7e3553e8e62c305e1b592c74bc9f6a5825a71d19753c51fc5df8c. 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/HKG732280337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41775a869f804a8c70c24030a76f40f8f0a956a5087d25c58bb81fd6ca3cd779. 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/HKG732280339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c7b3b7285a9c47c0227ca564a7aa706d7b14abd49c517b205a7913447215d3. 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/HKG732280341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4dc04782af2baf793db75dd965af1c6fedb948008fff5b395a1d8fc68b79a1. 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/HKG732280343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8bad2e5a571300b57be3a6e99c4a9d1eb32222f2263c2e7173231a3bcdd16e. 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/HKG732280348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491744a8b178b3d902b04eaa0ac601c8f45c1ea35c44af6f2a58116edd6669ea. 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/HKG732280255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f12210a2772d47cd27e5fdc769381fa98799fe177b938465decef6e7244d50. 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/HKG732280256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64691eb7f40174a82490729816237d8fd0d2a25af431bec3684e4ec8d7f268b. 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/HKG732280258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee28e5eb4f3205e58190116b3ffd27f5179024fc4fd8cc50931957ca545049ea. 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/HKG732280259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f87eacdc8e851a78867ac9e99779d275cef0814a9b22a2a41f04cca1f1d0d. 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/HKG732154163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87387e2b8c0ad22b6e1ce4c458ad6ae0f602a47589fa90c0a99d399c26c3d00e. 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/HKG732154159.
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 0xcac72f00983008685f86b3d0ac47df3957d582ed32483b2af23b3af7ffc4e31d. 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/HKG732142395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52330828d82eb26adb7bb9cadd2d6842ff2b6e181739928521a5b12f7f270e5. 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/HKG732142401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f377a0b958374f41ff08768478d7a17eb36be3875473a701bf389892379fb7. 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/HKG732127263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f25d42ef93524d3a11acb21fe445c5791a958bb90001fd6efa62ef3751861e. 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/HKG732153085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9bf0b776b4e60135a2bab82cea2b5aa7145224cba9ad3bf5a0d8e98fd03a8. 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/HKG732280377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036122fcb5f1b340b5575d1be114f146e3fe2ed669a89dfea123ec3704acdbe6. 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/HKG732280378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf058e299ba591bb352d954af13c4b0617f3f7de94ae78f1b33223a0be81abf. 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/HKG732280394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15076f6d2f5bc86619b7a5101f575577e57ee4348df891db1d8b9cd1e0de6bb. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:22:29Z), 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/HKG732280396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233cef2453f76ee41efa1857cc2513ded2920c1af7313d963b9756fcc54f6ff. 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/HKG731713490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003f8b0825341153755933b2cf644365c8c479a45243d4b1d31ed057ceff5bc8. 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/HKG732280559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702543947e0b257cfd80bce54361c463078fb9aa60a19a0d4124fdea93e7a5fc. 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/HKG732280561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd573820e478e58c1941a6767e1e7e8dac85955efa23833a3f64d11824cb857. 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/DGA0L2457592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b790d7ab85a020dea3c3b436c515e2e736efc54642bf8d65ea15a86037001. 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/DGA0L2457593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6acf9d9c5bcec4e0a101c302d3fc325b437032dee9b5cb7258fe702fbade69d. 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/DGA0L2457598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f5e6986df7013e8fdc5d44cc0f130462bfb205d6db599f47e9e3d17fd13b67. 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/DGA0L2457604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5237cae681525fdbe76f28f2f2f5c84f8ea05c5217af8e648e154d822ae2c047. 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/HKG732280305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42633d47aa5d7b83a89f751bc0cfd384d50c16a1e1b64de074a63c5898cd5ab6. 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/QZZ782403712.