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 0x87c7421322cdbc1c62e8b9ef987ca3d3ec5f66eb87a20814116646f2d22adada. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fa0f411-7e5d-49a2-b304-12319cbe5e99.json and https://artists.proofprofile.net/proofs/artist/8fa0f411-7e5d-49a2-b304-12319cbe5e99.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 0x31b424455abb86cfe8124c609f1dab045e3ed3afed25308ed8be2215bc59a980. 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/USA2B1803916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b358c839ead5aa8caecc994c9485d66c45bbe4048aff774a35b71291fc9819a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLCK41057870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8268f680f367894b7209fdd3abb5a1f818b2d9b12cb9250624efc8c9a39455. 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/NLCK42412292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728c1c925c956163ba67eeb02d381d894e620cb02ba1d727d91bee189ee3066. 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/NLCK42412293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eafe3359eb0c70e7f9bf7c6d9fa0508acb4625b43ef8eee0f7830bfe13fd590. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NLCK42412294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1964018feb1a559e7a4cb5b0bc375aa959f697a9252b54e2f15736b43d638af2. 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/NLCK42412295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300962975b86db775568a1a812971bf572383afe4469b13bc7e37b005989e2dc. 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/NLCK42412296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1391794178fcee7954e458d98bd8b54c7209183569f0a42efa7d86da7131429a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLCK42406345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cfb0cede085e47596621e644140d3928e718a61821d4872323a5f476c9fa58. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK42406346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd355b4effefd608a13c04afd048f1527d125b0f2d03c317dfa0f9475877b9324. 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/NLCK42406347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd5a57ad6485703c10e090504607b1e5814097389442efddb1dee6a759aee6d. 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/NLCK42406348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92dd2aea13de4f011ca51f5bbf78205c2d588a81109896265f1da303c2ea6f7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BEN582400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869264b4cf51d4a4c4b614a2ac088b13eb4f4378cd45e185b0ac169780475633. 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/BEN582400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa885aca90135dc669b3318318b1f9274129fe17cc34b1c2c96b4ed8e40a3b. 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/BEN582400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4a90169a4620f8fe170b80913297076e49f99d5af4d98bb60c14a55b7296ff. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BEN582400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf517fd19f95165a0ed91ca53081108e8e8361050f9aa0d5f111b736eb70af64. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLCK42341723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e49e75b37da454fec1582156899b3598c1f9ba255b89faf311280a3560eba6. 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/NLCK42341724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc1437963047fab2676768511553a9a6a71e84f0f9389fc6cabf73d029b90c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLCK42238387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedbde97ee3afcdd85efcc4783aa26e44837776156312650a75a6b94141ac0a. 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/NLCK42238389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221beeb4663837401f389d7be1da435e84fbf2166f858aa6f99de505ca9e441d. 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/NLCK42233759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf648e4cc256a470380026d775338bc268204e6f0d163d9b7a142da63d1a93a. 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/NLCK42233761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49af5c71779bfa1a6127ad475c28d53e1ceed168335549029cc373389ff0f7b. 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/NLCK41049056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354e23be7301c11dcb46c3ec270b86a3cb07921c4a97ccc12f1b9cc42ac6a659. 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/NLCK41049058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d84e2d606016ff61899881117a139c861fc5ae2de41b81e6ddd4f8c8be768f3. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/NLCK41049059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9495a03ffd99dca60f01c25070d9de479d8aaa4d3e55ee1a3b1c6d6323c780bc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA2B1702187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec5a21008042b6a8d7abea7601cd708fc79b30f05a5287c08276f3ef839304a. 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/NLCK41038591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3e186353f129d0d130270b70d39753caf3754bb8c6a0f40c21ff916a5bea64. 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/NLCK41038592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fa9bbe8c9da996e194a15eea8646be8218f8633208e8493e8827301bf7f8ab. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA2B1600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7639bfb78420b6e36546f4b08e0dca9beb7a3e05a775a5b494bb8ad12f353e68. 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/NLCK41032967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc71da1ee4345826ad12928afa7bef624011abd7ef51351a7b8d4557f3ed934. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2B1800470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd659b1dc4a1940fd7fe37f9ef77d6d02c854efa9bf175582bec104a203489d7c. 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/DECY52400794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6e2c3d9b76339fb0ad5032a42e2a59b877f6e43f457844ae425543284d0698. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DECY52400795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff1ba3153592a42a3f63aa279bd06b15525092bda160833df05f9c504e44dd5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BEN582100986.