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 0xee627feb08008ae9ee4e2eec63c8626f47f18520540b750ae63004e7fd2a3b18. 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/5162a9dd-1334-4fa1-9d7e-4104e57dee9a.json and https://artists.proofprofile.net/proofs/artist/5162a9dd-1334-4fa1-9d7e-4104e57dee9a.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 0x73ca0ef0d8a0bf8a605a3d108d4689840b937ecf1913d1ba71251f4f7dfd0b6b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWR2109388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00339a7bae763aedfacbec499d63ce2e9d9f7812b1b2873f76d4c332776b8c. 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/QZNWT2241446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65017a1036585612303ac0a98b70fade0f2313bb42c0cb55dddb6d59a607abaf. 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/QZNWS2377167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907f41d14f9aae214c6b4f3b4e4ae7697a6e6649a8c148b915fc13f8c3f7f39b. 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/QZNWZ2375801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e94a372d5c88909a730b98f4265441566ff34f7dfca17b77ca333d70486f2. 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/QZK6P2445085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d11f670095f3468511827b8aa399b89f6f8dc76af6cb03827bb28a94e73507. 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/QZPLS2493180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd405a5b32211cf574dbb26dec09bbcea1aeb6d739af31909e37bbb4c0f22f783. 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/QZTB62485179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76aaec1b06fe5d2e2e68df2a86116098d1abcdf6817d357e7e7ab81be3c239d. 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/QZTB62485180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c62caeee98e0c0abd376664f71af344f33bd392b80340deff8c75df675128d. 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/QZTB62485182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a90e157ca6f76189fc35e5b019c6257ddddb41919cd9838bcccdbc1335638fa. 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/QZTB62485183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484e8cda165775d4cb555ce351e5d50cebdeee80004426dda7abf76c4eb8126. 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/QZTB62485185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0409a2be570400ec2925bfc45c94ea9a1976104af5ceb85531f09a004ac39533. 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/QZTB62485187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b2246ac195fa492f16f56b0df09e3c6e3b02300738c7fec05416c0050b8f7a. 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/QZTB62485191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c10045b01324845861eea98e2238a9c49699ca2478061c7151a5401b6cf634. 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/QZTBB2444373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c610521c783985812ef4e7004bc7c0c05631af18a8194c43ee0420598b8242e. 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/QZZ7V2488587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917aa59fc71d6ab3c820f4bc138afdfe293adbf6525ff3c3733c0741b4c47b2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ22599655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea22844aa7c5c544607613e2f75f3a7f6e1a6fc904b303fcdefe8d7b28e200. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFZ22599656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8721fad3c55152cfe3d862e7e9c50aad02ba27afe16464951adc61e2801a9757. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFZ22599657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81318db884b7378266238b16f5f38301f94379af87f42a32c61ff3d909aea176. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:18Z), 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/QZTAS2588291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e2745ffc27a2b7bffa714df35e2f952efab30d7d1a9532a2ff330adeba064. 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/QZTAS2588292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c24b24317a8fef83d310403801654914e5892da750d9de6dd957f04e13db5. 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/QZTAS2588293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2afc795f92c175155907982d2b19d50897d68026d6edace3db37bdf5fad205. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAS2588294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386589faf14aabfe8c7d2990abebf13aa39fa154d902188869cb5db2ffca1e49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB22522368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e16199fa39ddfce60b7f919e019592bd027bc211267b535fe209b708fec7efa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:06Z), 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/QZTB92537363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46431bac63361c27850644cd591d4edcf8b99e37899c1ceca65cc813a8072f5e. 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/QZWFE2591141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809406f1719340e073e786421887bb9af113b95e5f0b054b0172179b642ae3dd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFH2508949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1fab6e4e1746f5119f30e5781b05651fc86b5b507802a8c79ced7a84501881. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:37Z), 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/QZZ7L2590248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6cb7cfc8ee25f9c1db325941d2302d151e8336f6572039b1464753e8351355. 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/QZZ7T2555953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc013dc8d1992c0bed6a3289d9d0890933f38fea1239934ba219f2f58120bbc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3EY2524537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a969e4c12c1689261268c1a5780cef7f2bb786b0f605f9e163b91ca7cb60c. 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/QT3EZ2589335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b0dec4cbe62ff7b9557151e5fd1790027d0082812fe824af3499dfcbe08d38. 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/QZTB62382123.