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 0xababb4403b174602a3f2b56a61d1f2a21a7c90e21eae745614a3da2e8ffd66a5. 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/e7a5ea64-b933-42f4-bfe2-adb3837c7371.json and https://artists.proofprofile.net/proofs/artist/e7a5ea64-b933-42f4-bfe2-adb3837c7371.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 0x402cf003016a62ca2517a31f5aadc16607e9541970ad27a7019b436822ae5d33. 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/QZDA51805464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9180def36328a0352fcb21e097079d46c642fe1adb04a513bc7788fbe8e523. 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/QZES61806748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1688a1d2322cb490fb7c5908f994ddeef448cb47c52b858b528c802bb65201. 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/QZES81821922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4010585f8329dfdb82e6e993012acf9f31d783a4dcaeebcb83d2e012879b8777. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:34Z), 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/QZES81821928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19f3982030ee9583a18b557cee9080af8cfafb02cce68ee0638cca934a88ca. 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/QZES81821931.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3363286f2113edb401dd8b1a9a2f0ed4513c46a015c2fcf013206ef309ec2a68. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES61969005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715dba7da9541a8da40344eea7530457b14a8df76b7f7e304a923fa0fe39905. 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/QZFZ31989566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cdcc2c47b6fca8b51de22888837e9bee023b83141c28f863661edc7234e0fc. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PLUM72000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108132046ad8e77b9297651fc89850c9d7ec968b2c119c93eec9c4c0362e4ff6. 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/PLUM72000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6996600d8b916eb703276b8ae312537202cdc505b6ab1e8f86ceed7c954b91e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PLUM72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5fa2233d57ffd6d0849ce51daea492a5cda4cff86ab5a697924ee609acb13b. 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/PLUM72000547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226daf0c672315a7fe9f2dcde4b29a8ee860c4f7a41ec5deb4cfb4ddc26b1dd. 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/PLUM72100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d0fce01cdff0797f6daab1478440833a8cc0b28270d6f29e246ed2a182ecb6. 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/PLUM72100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab54342c19bb6f51a084a50cb684f9e6bb5838603d658d47f4ca5b5bf3ea54e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLUM72100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe792040a56422f0f0b42578de3bde57241d99cfb20fd280bc99acab86dbea475. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/PLUM72100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e61f73e7f3faf415d1070f2895a6bd7b2070ca2c3ce5f7b808ed41b0b6bdf77. 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/PLUM72100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a504e453c057126cc3fc242f43a30822c98cd7fa1727ba516af1175be6715c1. 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/PLUM72100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97abcedbacd8882faf814545a935bd5812677639f7c22e65a8abfb9cea97ebe9. 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/PLUM72100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b849ecd85c4b88343f52da0e86367dacd1a95d0bedb4e5bfeaae1e4bfa8208. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHNB2160035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7742f25b75f5f9f0b28e384a058264a840f82b3c2abc14b8cc1b3664a88da2a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:52Z), 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/QZDA82233565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ded3747a195949b9a1172ce6130144a1b51bf9678def1e52ddc2c9b091bcbc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWX2109535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b39c1157d5181aefe90521b116b736e9f0d45a9fae4a1799e5f0f0c0f94c44. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN32236547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07cfe1d497a1ba40497c7d2ec3d0ccee114894321c2a19d05a565c46d130625. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHN32236548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaaf493a1c52f955b34e909c8079387cf660268f9756c16fd1098c4a0a8438e. 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/QZNWR2103752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e576d7c0d9ace022194bbf56963eaf5d13570d07b8918a43643421d89156c2. 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/QZHN32236550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30f1fabaa0e4319372c7e5167290204f570634d239a3773bcca9a4d308ec06. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN32236551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a785735d70d005bb4ae6fb4fbe44df8a396b3c1994a48e19db882dafdae2926. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN32236552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd0c0f56edc99454f82e9d349b51307d045ca97e7ba350c41998d1a815214a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:18Z), 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/QZTAT2159115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583c5a3e8f057c4e46a4f96f86ef6ef7cdc741440023ba2604cbaa89a9ca3c7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062112654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c20de05546229ffa96d56ff46bab55035a866f163d825852c8294966c116a7. 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/QZES92244784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6dd3379bcacdddaac914dcd53ffea1aa3d3b77ffc1833c65c4874c1dc1ef93. 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/QZFZ22296616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9e3a3a695e67af82622147c0096f1d5f1bd1f9f3c00b1d613b8502db4eef0e. 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/QZK6Q2108848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94911511eb295c855fc6d58cbcc20e9922c29778440d8bded28ca12cbefacd. 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/QZK6Q2108849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f4b333fab2d3c014a53970cf1f349783754ecb6b942d742e7c8cdd180f37a2. 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/QZK6Q2108850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaea2d917175629b078670e5d6ba8161612fae5720152e5cee7d9102ce6fd64. 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/SE6A92121787.