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 0x90ccb4591e1d453601eac2261e88638722f14112659b1cde7d96a11a6726d712. 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/d01fd5d5-cd6a-40ab-8881-820b98096f6a.json and https://artists.proofprofile.net/proofs/artist/d01fd5d5-cd6a-40ab-8881-820b98096f6a.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 0x1262f1f7332a46f6e0bdd7ca4adab7293769b3bd0a7bdd55881085e8c84d690a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE5Q51800482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a89f3e60e1e400b9b8487585718097b254348d69a347b08030a98b790dd160. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q51801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025583012f69d74b67ec679f213581a34e5b4fe866521069513928b1af33dde. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SE5Q51827335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bcf5c5d172c815e7012c93785ef757825c7c64a5a242a974bc7036447867dc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE5Q51812676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962550be04472548215fc3ba9e5e0fb4f2ecfe8c87f0d6cecb5bd911753431c3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE5Q51829186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cd0385165a2891cd6cf4e120582e013c0622ed48aef1ba1bd2aa72741a6655. 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/SE5Q51828921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5a2f4bdec31173844792b3db597c8f0a919389a90f949d2d194ac81ce2716. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE5Q51900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025583012f69d74b67ec679f213581a34e5b4fe866521069513928b1af33dde. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SE5Q51827335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2914bcf36f3267278cdb365f98c8f98c8f7a946eb0f5f948f138f495baf2b05a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SE5Q51829238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94f3c2c7d828fa165d1de96f86aa0c28d01f2f6030e63702f973e679f84d37. 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/SE5Q51900962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ae7c49f4d0a65509e761401d68d6d3e7f6bcfd7720fbdd87d7cdf709ab767. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE5Q51901388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65a470eba1e2f80174776421299a8b1747f781a297225a58e709f416bfd5bee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q51902074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3faa6c203edd64cc6ffcf06075eec00db2f6e4e101d76025a33605a96283fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE5Q51901697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa84dce83a18e3d2bbf97f2dba9a5a7776255ba5634187f6ca8e3b208dcd76ba. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SE5Q51901696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915d2e4c624e25317d4663a03fdf52d26f2444469c59ae267be2f0735a226134. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SE5Q51904065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683c230a0bf45ca02197a288bdd3835035398aff2682c578dbb46c8c4c9621a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q52002399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f93e00a526b794da0157d8dc881919bd22af3c646142faa46c593dda87e6394. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SE5Q52003558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96cc03883eef4dd52a6bb74494d53b027e6cddb9e23fca10801d15b001d7a36. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5Q52100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf710443d34b65d80503c08e0ca16a29bf65c67128ee6829d346b517f4e457b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/SE5Q52101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ac83ec408495637f5327a9835dce94414f78b626505a08cf1143293f596f9a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/SE5Q52104242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706be3e67704f44f8a1e49e00fad115ca500983f267100ea12fcfa0fffe993a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE5Q52200344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ddb4a4fbf908d7995e41c53a474917be24884893969f7ecebe6f864011ec75. 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/SE5Q52201615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e872e28bd852869edd1781bedeeb88cddfb180d4847ee2b1949c23df71c5e9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SE5Q52202639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbf223dc9354d1f156e56edd9b17addae15670bf453d0706d69effa7abe55b1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q52302019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ba512705b26a691c5f48e6922d7e4735d960c2a29b0c6b9ade41818377babe. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE5Q52304963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22d38985afae97bb49d75d7280a4413d4c8b9fee29b0284a24726ee0fc3905. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SE5Q52400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433dfc1128f6384f39ceabafe5d57c3e19e333834b2894f7d5ff48613b99507. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5Q52400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe1cb1e2a05c5db31e5293649819a5c0a2fae9a67eda11d24dfa57c7161857. 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/SE5Q52403186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1451737534e5fa629f4364a2c078e01a25e69cb075cbbec10a211fb0c5e9e0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE5Q52500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d4c9d297976d078b9c14239d0ef4b306a840678cf9e94ccd9d6b86f46c126. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q52403848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2182ba832be14e668d98c93e16f9661dc3e5b5e3fe5f21a65441b4a5f42dc9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5Q52500654.