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 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 0x7c669ec6fcab7005926794fb44a911286e2fce7bfa2c39f1a62ad4d9e60e74e8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d8f546a-1636-4d75-9199-8e92c2b769ea.json and https://artists.proofprofile.net/proofs/artist/3d8f546a-1636-4d75-9199-8e92c2b769ea.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 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 0x6f6c0f921b86b11db1980bc8fe79bc4eea133745134dd85fc57b3858e92dd1c3. 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/FRX281929398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fee1d54f8e6fcbf76ee1e22399c301cf31467aef379dc32139a29daccf6a9b. 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/QM7281917843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbd0666665735525f274dd5c8055db01cfd406dcb75ab045fac84064ae477ff. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX281929400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260baa7ea1a84ff84705eae9becef67481d6619d2cb7c30f23d86699bc3778ca. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRX201902381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d8a6bc93bb42cf0784ab21a564bce02e519d153ba15df5cf30478dcdf6266. 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/FRX281929401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf62adc9a5d4e57a892a730da67d3b74956f12dbafa526bf57ea3be19a88460. 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/FRX281929405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ebafab4088041e3f9eae3d96cbd7c5dda1bccb0349f3c50ed96ce101df903d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX281929403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fcb53ef7095f4c559c693d435abaa3a68d028e892421a1115ca7efe2bd7c09. 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/QZHZ52146052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c67fd55f582858c88364c4023dba99c72344cf59ac061f48f471a2f328c09b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHZ42289986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a377089c0dfc6d5bae095df5bfb8bb26de00fe15ca52842f0ebd388909a2e1. 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/QZHZ42289987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd87f6d1a6e786ffe2fc62fe0658e83c2dfa4b51bc0661295520e08c7c48af. 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/QZGLM2221570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b03fd44c9bd673d78c0301875e4136f23499f13ce6296249f84e3ccc60186d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHZ42289988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4442942c7876bbe24a6066f1eb3f9730216d07279cebe75054a19bdfebe02826. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHZ42289990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b09b3a0e8d8fbe408c15298f66fe917ab94532d5703f26c83c01164df80cdf0. 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/QZHZ32213545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470dab0380275afbf9a76faa8209c6169c8abec7809d401171b3c8fa5fa188ab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ42289991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a416e1a0c0ab3b595314a000f7986c327a5a8f2d5747891baa5eaf0bc9a90e0. 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/QZHZ42289992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb51af4ae9c9bc9c8c8285e722b1b1b3d7f7027e0b39aa4f705559eeddacb7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHZ42289993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f101a36a8a230256029436d09d1190e96395dd1e72e329e2cd03791b35aefc7. 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/QM3DF2251984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf02cf728bc4751e655a0bc3f17d73a7b9c4a12b106abe7044f8b7733e38fd35. 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/GX38U2388312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca63218fef4293ed6d21461f56da59bb95636055c10e9daddc12b4cca24e5051. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZWDD2296635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f600dd5486dda3f0d0baebe723de2d7fa1c1015930cb4b003cfd0492e5f28eb. 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/QZWDD2296639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b09b3a0e8d8fbe408c15298f66fe917ab94532d5703f26c83c01164df80cdf0. 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/QZHZ32213545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd87f6d1a6e786ffe2fc62fe0658e83c2dfa4b51bc0661295520e08c7c48af. 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/QZGLM2221570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01929ea7f4fdf3931ee616f501c1b2518ec0809d55474262a03802d81f964ad. 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/QZFYY2046166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68eea9d1c5bea6b15ec3d5b6a97f718b9663efdde4741ff04cc275b52d8d5f4. 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/QZNWR2063268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c39377cfbbe72cd4b54b342b72b5f8f6c7c741df148ca67de98256bffdb7eef. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZNWR2063269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5afa7c70b34a0c9d8d7f18d318d4d72fdebae6986f29c38f0a402851be5b663. 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/QZNWR2063270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078a844341a979638b5eb9581600d59b6e072d12036029f25761a8543d01830. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNWR2063271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a229a86fda8150e9fc52f73d72dc4bee36a71c973d2c70759822d108fa04d81. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZNWR2063272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062efd0bc1545c0ec4e67dc3f94efe705a594d08d1eaa2fb4269dfed73d8b417. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNWR2063273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a3e737e7e7fdd61dbb7130f5c9a7b3e4039850e20fd3a3a523c9c29109b659. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWR2063274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c3ef3eb245fbc06a098572943f308743e99bf2f196d1c58fe6131229b4c1a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWR2063275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d65fd8ebcd9906bd6353095ba9b5386b4099a3183523e520a77b72bebc976. 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/QZDA62099269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d65fd8ebcd9906bd6353095ba9b5386b4099a3183523e520a77b72bebc976. 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/QZDA62099269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8f7f046276c0067bac0c92232d2f0378f4f37f43531c7878821eddedb12d82. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM3DF2251986.