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 0xbd7a0d8e68dd651d87a60e182c3bbfebc6d935ee8b397f774ae4f01d54911c81. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ce2ac7f-b302-44dd-ae09-bcaa351c3cd5.json and https://artists.proofprofile.net/proofs/artist/8ce2ac7f-b302-44dd-ae09-bcaa351c3cd5.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 0x069f334d10f6cf0b9d1eb4e9c2ae73e7cb6a6ebc2a7aaff550159dd88134a905. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542310521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc334643d2a20f4a5eece996aa3f49fa7edbb5d24b7fd03ee431ca7b2e6045534. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/CH6542312616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f1ee5ef9f30ec16f066b0cbf91dd9b3a10d018c4ea4ad6d420be15b1157be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6542312617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c59ab2d73877ac531a5acd7470c310865ddb5235f717bb99fb8228d9191fc57. 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/QZWFH2361824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ae41cc03e658c7a91ca2f493616be5450879fd0812ef26d67c22ea9eab591. 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/QZWFH2361825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27530d30f97e0d006452bc44c55a2b639a3d935e3bef28776c22d3362169eaec. 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/QZWFH2361826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2afff04ce36425259697cce3bfe0fcdce2970e511d37cc9b875bc844769439. 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/QZWFH2361827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189fca37354ffe1f47b13b90b3182e614257bcd099853bc163837183f1f2491d. 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/QZWFH2361828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd370140050770ce33c5ac64d15351323dce1ccc69735462fc05fa01d5cc4aa2. 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/QZWFH2361829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa5e750ee728f5a94562e4cd6b9abb4057b746d45ec527ee7afec14d7495c0a. 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/QZWFH2361830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8f5f6b47886c5e85b271543d735c3c1c2e0dcb1d807ee25148f2427e91025. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTBA2475030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db1cf7ed16e13b71df33a96605607fa87644ce7e3306020293c715fe1bc1e6d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZTBA2475032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542b097bff678a7bd3a72f9d378216b4a3cc0dd8deca9405b372f72a0b2a23a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBA2475036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457dbe0c8c6492db6e383442efa87519d0578dfb6c6ce3d688328cb6d02ba63f. 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/QZTBA2475037.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82fbab9fb2e8ab4b5d34a581ee5449348bf5bce05d70110d6c3d2633ed119bb. 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/QZTBA2475038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862767b97fa10b00a8005df9fed412735ff64e47921075a9c25f2a172ecfe763. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZDA52519910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aa28a1829130a21c8eb044d864aeefd3f9df5c6f7feebdcaebda12ee7e0df0. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZDA52519912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf560fa7a09814731afc3500e85a506fd684933385db3c73da8bdebbcdd9bdedc. 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/QZWFK2500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a24b9adf1e0c0a2df158b46ee63c8644b09c329869da328184138788b15d988. 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/QZES62422518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd28e1517cce6fb7ef81ec123259cadc8a7a34bda366cd8313aab4a333a3b1a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZES62422519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eb44c25746f94d50dd42c01b669f929596f1669816414cfce58a5ecbe6a802. 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/QZES62422520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430843ead32a45fa451b4cdfd8c386ebe334a3e69c668110bfc84cbd3c3a790a. 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/QZES62422521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e214347e62b8feda0a780a89c228af17ad3a25cb806998d1c2889cbb990012. 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/QZES62422522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb069cf9c60ffc594418e11df14809561d83904d17121771c0e0c03a960ec39. 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/QZES62422523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faed93fe9c8fad42d3c075f0915541abca7f6ec14e1f59318afe2901caf174c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZES62422524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589baf1b18dea64a829a271545e0963c19a7196324ad452efcd7b9c24529d533. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES62422525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacae9712f2bbe546a23c3291eb834455bd8756ee8e88575678f28e1960e56b0. 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/QZES62422527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44c60f395711eb448e2d2186309e4a3707d714d11aa41765e7b4a7a20d6d03. 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/QZPLR2357143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97741c23f1cff7959b1a54fa987bc6f57711bf42daff29f6114914ae5a0d1fbe. 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/QZFZ22433374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7778cf363f2c90fc2cb26f2b546899aff0d69dcb9874612f1cb3ea41779fe948. 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/QZS642310963.