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 0x6f9adfb119ce4d6ef72fef234f30fd2f55646639a318ad429f85ffb40faf3b4f. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f53b5ea-1504-4ea8-8c30-f402b170725f.json and https://artists.proofprofile.net/proofs/artist/1f53b5ea-1504-4ea8-8c30-f402b170725f.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 0xf233c35c914f42309c62a68342c684389e1104b21e7a53b62a0354d5ea4b0619. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX872199038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a8a5d04846e0042de68199d8d0b1edaa858e48a942e01f138307e19ad55c8c. 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/FRX872199039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f553b78479d72a4742ad52d322f686fc7906c8e700bd9d14e9df21ec5b97e0c. 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/FRX872199040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0608cb8564e85883fa178f6fc985cbbe1c92f535d3be148ceefcb4f52e514. 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/FRX872184699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7d0f2f0d0f450b12eaf26bc5dfcaf0eb99a90f0c6f8330baf881ce6a14ea6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX872184701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e3cc22e651b39baca5d8976829d1e9588dd827b5a018a3ba76de6d31c6380. 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/FRX872184702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776063e2083befc19d0ae497c2102541d08a6a1f8e21263daeb7a3a380bb91fc. 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/FRX872184704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2df65d3a92d800e85002a215705868d98b3528fc51e1193d7c3695347f4bda. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRX872184705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2012d56bd9813da1b7d9bd5a8a17ca66573e1e4879b3dc7d69e8f8f9dc21fc6. 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/FRX872184707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf314aab11c9bd28b38f5179fb9bd16c259cd671568c716c1fa22b2f7710f95. 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/FRX872184708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b943cb78c551b80bd88da5deb1a41b816e5ac77b755f241a5483c6e14dc8969. 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/FRX872199203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16577f0010639f2419466659d0b3e35ea65d89e39100b2aecbc06985529800. 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/FRX872199204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3799f1fbb4b72fe424d80472825acca5abf42e98464ffc8dff5ca0747abd7b. 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/FRX872199205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f29b69c8a5cf987bc3668f97eabd550368d6528b1a26339aa57eedaf642aab0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX872199048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880f70ccd5d0fd94b88c11efb30e16779258ddb32e98a8c1b4015b00dadfaf1. 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/FRX872199049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a785c59892b23a5eca0afa444fd908bfc7dc53c92aee94057428f632b896ed0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FRX872199050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a01a7d21517ad822495fcb380f1d06aea1a17c3f77deafc292a5867fb502f0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX872199052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf545fdd363d55605f0d979f8ed911527afbebbc201e24521277610493e5ff67e. 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/FRX872199054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09983e215a2ebf92ca76b6ca4f7f29ec2c9fcf256db4b4f7a6d7fc3680fd99db. 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/FRX872199055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c977a8e77d4c9e6116735c525bb8a2c0ded5e68088a97786f3814cf67e657c. 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/FRX872199056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7efc9af4c13491ed47a5734c6c5f022cb9e42e54f81b2ac95d7a2b4f3c3ccf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRX872199057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3632901edb9dfe9721de68254c9047ac3de86daf50a4c7e15041c608c092f2. 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/FR10S1987458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0e11fa143a43151baec34c32d1493b136a6db81144178dfee96d0fe32ba1dd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR10S1987459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe2c8bd5884c4aecd92610e5ea923549652256392e5cf5455377ad5d996cde6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR10S1987460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec9f0d9d989966ac6cba210887fb1ce432ab1ac44fca5a63a0de0e96458bce. 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/FR10S1987461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d21ec29a37877722ba4a75f73d9d2e377692dd45df3c9d101f23382e1a43ad. 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/FR10S1987462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd7d862e68836e9ea9c42a4fb9493177ba8a8e42deceb946fe358b2c586cf5. 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/FR10S1987466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9f4dca02cb5639be7d24e2c03b548e4fd472277c719a461661bb62081d521. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRX872184689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff04a3383933c4e8600bc6394804fc44f187cdf534017a053bd4cfc7448da9. 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/FRX872184690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036fa61151581bbfe3c047cf152cb68983ab7f59218ea29cd63e3564c6be2311. 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/FRX872184691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7581a7e3624b30ce24bc4fafae47aa8708314f87b47fb747acc25e615c1796a. 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/FRX872184694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb64322a31962368963beaf1a15860725e63fdb34f55cd500e60cd78deb0667d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FRX872199041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ade28e3de13ebfff7f9662bf811d6a74d37a446f893e3cbdffd99b3f9f1700. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX872199042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91435baafe5e6c943cc4ae8ec5572e475ec395332689f773e9b560ffc38794fe. 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/FRX872199043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58548cb7ca90be237191cc3161f525c97cbe866eb606d1be8eee6fdd852ea5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX872199044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8006a89a1a52107758ccea865f430b7c14b227aad6a0aa151f9c8d7799db0d62. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX872199045.