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 0x00e717da2dfd974458b55f3e4c1c407549c0f33fe0e6d3fd2ea1c8e94fcba78f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7460f1c5-f52e-4b40-833f-28b64ca3adb4.json and https://artists.proofprofile.net/proofs/artist/7460f1c5-f52e-4b40-833f-28b64ca3adb4.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 0xf837535a44dec668b2f0e1fb140215df47c6b22fdd30faf7038cf7cedd10d012. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZS642147437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bdaa4972a456a837102df1903fd3b3f909d9f9914db7f536f7fb37989d8a10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS662195540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b92527ec346516050ebba9eb97a59d91cd3c7bf8e433a62608a0bae238c9aba. 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/QZS632136984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d7c72801c4d2f1e36e0e7140f55848b0a02f7ee29760367e774ac1d0fadd30. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QM42K2256603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c19d9fab680ed693c9201f044726eea7a1c77c0375e2a5a01d28be9d81d4f1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZKDK2245935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32922990abaed5337f18b1b2d6e8c16a8c239948cf1730c2cb851e210e73654f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM42K2251014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8665048bbf6836bb6934779e41788d97990012b10738ed3d4e334209bdc24160. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM42K2219429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae16a4bc594d127ba80d883d4cb2e6579d84ee1f5222482f9429d82c388844. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZS672216045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ed885c8d75a9ecf57d95cd8c010aa3301ac959d9015c59291630098cc39ac. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZS642273745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0930faa363bce328a5226a4146eb728ff6a51fbfe24986aa27797a7405dced0f. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZMHL2261874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfdc13e2e71044509b02b24e7d8e7c5af4c55e75d6d1b2a53f6dd98c661f882. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHM2365967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ccad6be775adb3a4049602dca281c87ed0baeb0c1d1f696051a6cff0c3499f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZS652342932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634ecf790b29020a7f6c59a357656902daa7e23847825cd6c9a8afccfb3d526. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMHM2365523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec4750255aedef75999bbdbe7ab1adcc8d07d121db00aad77c2fa8802fbd22c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHL2374465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef77de1d11d7dd1d963a774125a8cc4e135a8666715c811bd685ff8ea76e93. 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/QZS642370789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26e2f5fe474377122d52cd05d6b7a2dda98bc7713ac624fb1b35618d8604c7. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZMHM2360318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26e2f5fe474377122d52cd05d6b7a2dda98bc7713ac624fb1b35618d8604c7. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZMHM2360318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b38a3b0ba116d1dffd759978dcd255a4927b64de299c3213b3eeb5af520d2. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZMHL2363915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54529655ad5ef950c3ab50161183d04c49c9715e8b2ecce09afe8a7a1d182009. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZS662491676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd72a44bc9600202449a29cc9deca3485606e1c85e788f32ea0d7382ad2225a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMHL2431322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff556272115de475297bac5a22d9e1528fc241d7e3869ae3a0365ca7c2a42ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS652409634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28adb3a9b68b62ab8982e1b324ef8c52ddd781d5aa3c7cf16480e1a1909a1b31. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMHN2413063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd00f8b9d706e70ff3f95fa997212f0e41d975824f51c3634cb7903f83c9fa5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMHL2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e6b7383f61a41e1ad22b5cbe0d9f7c45096df569df6b338981d082eec77bc. 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/QZS662439919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c203144bcd72fdb466c6526c7c1b816c32b29b287496ee853090c1b30d87e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS652409161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3de8a5c089bf7af56542c40fd36d0881e988b8e0279a88c86bdc3e25f3c7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS662477433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dec70e68079df607e89fbc96e09736c7959754285589bc015a594217a09b96. 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/QZMHK2480816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71bd9f0b0090096f39d97938b1a81949532ed464b8e0b67254230b038dc9729. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS642453142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332722c450c0113a9f008164e958eacfc41dee53e3392b6201371264ebfdfe86. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZS662487260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2988e2ff0a23c47e3829884375ce7bb6ad6ed68ec7b92a30da045912f6a3a21b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMHP2470407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41034971f3e886b534bcfa450d9efff49cc605e56a05cd1ce9847c91aa5668d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZS632419178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdae009d7a575278483b88e0d0b27e30b3b11a1499840b9f54aafa46ea9f7d9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZS642474621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922fa171bff0b873bdc62311a59a5da0c9ffba3ab64a15248531e0ea2f68ff67. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHK2485565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1f283fb75999ca5c67f02f3d66355c6b800111020afbb6e9b0acbf3088778e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZS642438021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa448e49baa65c2aa82a748c3c41d80867996d89ceb8f1e9af141cbe57bd8c7a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMHP2360339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ccad6be775adb3a4049602dca281c87ed0baeb0c1d1f696051a6cff0c3499f. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZS652342932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ba066af6beb905a39d99db34639c38fc136158759505d76560357c9b241b2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMHK2453927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5cc7195bbabd4248d6557ff4a2047175e400044ff083258088a738cd8b85b3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS642401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffe155be80c3b1b9707221d9cba657c799858b54b56005d8c70006909259385. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS662424538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375a10202ec75405c320205748e048e5ff454fcfb22640ab13c8733f2a600205. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMHP2454400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74d52934a79adececb1c3ef25d38c304761bdaef0d0afb9fb62f295897d9703. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS632535637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e80139b7b7ef455836844ff26773deb07ac3e4a1c15aa3641365e0fb955996. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZMHK2537698.