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 0xe382d7520bd2570caf0987adbd274b6c74e52a91e2969a3f0bff1fd768fbed99. 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/f8b4fa03-04af-411f-8506-a4ff49481fe6.json and https://artists.proofprofile.net/proofs/artist/f8b4fa03-04af-411f-8506-a4ff49481fe6.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 0xcad27c553191ce3005a73cba8e1b5d9cdb200acb246ae7fb5415752e58b37fc4. 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/QZNWV2125760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e49574b85e737d9e73246802a6d56cfa4556f4bcb75aa68a9db117bc95a371. 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/QZNWV2125761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1417ec6f99e866e49c102ee5a80f8d96747a3391ecfeb1ee78574961d517abb. 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/QZNWV2125763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a94a544c60d7083643a3aafe53edeef3e51decc7dcaafec4c162904288006da. 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/QZNWV2125765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0592871568eb896b515a943cbe9cd0953e69d6932395c8221a13f9e88630c7. 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/QZNWV2125766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be22611cef2c112af28821236d3f88f56f7f125fdc0880b4c25e2f2234c2e79. 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/QZNWV2125767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f7b5a6ec9d0f512889f328adda6fbdc3b57ab58d24ef8b8a7c7c0b923692c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWV2125769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad96bceef3eb4aeb770f8e92851dfb57ae7b946662c16df31da538a930c03601. 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/QZNWV2125770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a647a05c5d0f52a6a6ac82714db5cc70924b560ad20a953d455d5879a8d3f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWV2125771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a47f7e14009fa42a43f1f73061d8bd61560a97c1b33249c223d6d33d29d53c. 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/FRX452128675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40250cfe4121f0f5cabb990781356bb90d710606fba43e5fbabc45d7be966e1. 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/FR2X42221649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe6cbf4ee8d70501091b0e375489cd922f5266fca46f7a31234497c5b9d019. 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/FRX452246502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe830a453305f3e085ff0d22e0bbeebcd75092e059adf62140893cd1b9f0da83b. 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/MYPI11200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee83becf41ae70cc230bc95a45112b0e387d466fb128b8e9ebd461eb993b8b95. 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/QZK6M2215021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae07aa8921cc38b31cd20c29a58b911afedd75f911aaa168cd24918afe95b0. 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/QZK6M2215022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3e63542ea1da431cfa8d8aea1506f19f7e7ca2c8dc8576bebdde0803fd7346. 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/QZK6M2215023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04458fef832e2c86f9c5f0cfb3dd4b86b460942692a217554c9fe0ef7c0dc220. 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/QZK6M2215024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e6efe057efd8a9be675016ac41583513ec9b2afb9df44166a4156e2bfe3933. 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/QZK6M2215025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787729b0960d48dc8faf234aed966d95b233d4eeefd50cd46a6c2c92cdf0b0c1. 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/QZK6M2215027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b39d36bcdb764d76227859f042cac0ec9abf21a6251dbfc751cdc3a19fff8b. 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/QZK6M2215028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbaae06e4d855d8ba1800ce1a24363064fed6c1bd5e0dcb559390a776d1e636. 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/QZK6M2215029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c04c341596de91c7a1259c2940587d57f07b0b9cf363835a3bf9b2fc4d61ef0. 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/QZK6M2215031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e66de3b1c8fe5e2f4458539cbc67508f674c4f7cfe6b6632de5825a462574. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/MYPI11200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493f1e081ca62beb9be3bbfa472abae88756ba342f326c76aa0a5761b494378. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:05:56Z), 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/MYPI11200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a16541bdb1123dafa11b234edec3f6aa07ef9fab4b6d1a0a6e5495c450d6d0. 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/MYPI11200156.
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 0x0e89f11a24405a70729ea25b56a31cc52f0a2e5d9732248733630c49e9a6b94d. 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/QZK6P2442087.