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 0xe95bbb85a1dd1d4df26395a499f6952f6f5c1ef4bc679e74d22e47cec577e419. 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/1a1b8ee7-ac67-489b-a555-1db00f64b9c1.json and https://artists.proofprofile.net/proofs/artist/1a1b8ee7-ac67-489b-a555-1db00f64b9c1.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 0xcc06055c37fa9554d761c3dd3ad87d0fd182554800a14a45255e6f45fddab4e8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGJ1737050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314bf8cc4369912a362666a24634728701fc63efb45e42043ec8646c125e6534. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:07Z), 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/USHM21720755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ec79d306880704af3d0da09659ef4c10b108d87ce2d52864abee53989c7c51. 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/USDY41758154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e8e38d810fe5a9972cf28681974094c1e1de23a2d800ae50d22b7e37ce6884. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USDY41792758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426d5eb2806c922d2e18bc57da313b96ec891bf6620da9df7151b1cb34d67436. 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/USHM81742891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9286bd0485ac50a01b244c5fdec62207e27e43b6592fae9d047950e8481e8f3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81743211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2487361418fb6d11812a1c4134397e9633aee77379bc19059774bd574cae745d. 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/USHM91724949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3525a2bc9c6f20bfba76ca231f0a6b3cbbc4af2c0d4664f2679a36e274bdc2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM91755229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb139287fef85eb9cd91971201e71b319499b2b693264b7cf4a0c76ef4b5ee95c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91789970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14832b147b7cd8eb029f4d81f0bea17431f5afa49251d8b69039db6ae28be8da. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USCGH1818951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554926523cab720b274fb86854d143bab8a8a24bb697ffd8ac9a327e55155393. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USCGH1818969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad27656d1abaee0ddc72506530cbaf20ae0f2073eb1df81ff79e5eb9ecc8fc. 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/QZB4J1830182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638b0938e882de29661d00bf903286c3912b5467f2e72fb5a25e9e350dd180a5. 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/QZB4J1896938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb9a1452204bf8e16947140c265dff2e9d9f22cf2f835020d12968c494e304a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZB4J1896942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689bc1368141156c79d09ebb85ec2550eef419d35ef67fe27ad650d4b548ae81. 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/QZDA61822198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7c7e10c1ec65d21ff24da8981ddcbb5844e43eba357e82279896c44af1448f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:32Z), 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/QZDA71808860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67125f5aea0b2a485a7558a727431a184cfdf6a182c831666db0be0c80a4b3b3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDA51910746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8852afd589888d599da715499b0a4356cbd1600bfd44cc2b6d13e5a1ad8cb0. 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/QZHN81923471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeb9336246635baf660c2fa14f1081132d1a014f86c46b4f6819d7af7ea6816. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:52Z), 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/QZK6Q1955395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf720f51a459bfc01041a0748edac697606a71a9731079cb07573e1ded346a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:52Z), 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/QZFZ52010880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a270402992930d0e9ee2b4ec4c2200b8044fbcd2d0451770b042bfc9160289. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6J2012373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d078ce318d88eb8f9558b7e2ec59e73596f2532b6040fd0ccc32e289da85244. 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/QZK6J2012374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6cf4d0388d324246ef8dceed76b6687f4b64d70f5795c787cea2445da2fac0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:27:56Z), 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/QZNWW2012104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02b542edf93b3f7b05652ebe79e8d5b9008fdc88493d20e4263d430c3ac0c77. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWQ2182753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce742d46b12700100c4a1aa3674ebbfa5fab41aa4d9e90d2546dc1526eb2e7c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6K2278452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b415de567fb0154a2f1aee8e3e9bc88bc18277953f95a84ef4e691996037af. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:36Z), 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/QZNWR2250914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea5b7d206f917d72bd03f9b9abeaa97cc1a788108bf7409f3ef4307df020b8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWR2250915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4402cccbe0807d1214820ad4dacbce0af1e7e9c2baf590d69bdce09f9dcf2. 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/QZK6Q2369842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20796643b5db2c0a697a7c8b318439c0bb59e66604d3ae2f50a449d15a0305fb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB62361221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf133d847f80995a53eff2adfa919bebc124e443fdfffa155bd76052df18346f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTBC2387717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5afeb0f8f0d6f73c817335e5ec94641835c2b9b036d19b76301d9159e11e43. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFH2334368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ff9cbe01a62dc55c85dbca7e0212bdd19337c437470c260b0455213eeec965. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZWFR2332822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c97b107cdec58cf283899922e8839a8effd3ffaca025551339a1601bafc354a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92451669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21075ea0edd04d2efd822b2a08c42845f67a69c687f6512effa607cf53fc3047. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6J2461645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98162c1c32d39099742969fb850bcdb86f709755f6713059d7057012724fa0f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAT2449910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec71e52341b7b3c0ff9fd86eba409fbf228c082e0b161fffa85939275f9b7df. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB52481684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644472dc10740739909e0da4e7d9fbb6f4180cc60ab1b67895849cb7a485d5e4. 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/QZZ762430141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc36a861ddebd241a8f7659875defea01b12be51d54df6ae858922813303d1. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEM2520699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd146db18839ffc91a3c738a03d9df8aa5a1f40e3766b00d58295bea6e0732372. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:21:59Z), 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/QZNWS2572147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc36a861ddebd241a8f7659875defea01b12be51d54df6ae858922813303d1. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZMEM2520699.