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 0x59c92a899f71c489d59047641ed71138d1abd2b8f2326e26c2e2af8c6b3f69a6. 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/8cb33712-8cd9-4ccd-a393-2d68f1935f89.json and https://artists.proofprofile.net/proofs/artist/8cb33712-8cd9-4ccd-a393-2d68f1935f89.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 0x9f9e2d5fe9c435dfd62d273876bb4d4ed31e7d1dbc1a6c3224ed25a347484c74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYY2137872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e059792a99713fb0e2e8783609d087cfcef5bb58497cceffb9fc7b74cb2363. 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/QZNWR2499686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a211b84edd52a69e5d564a2098c6d41735e3747b358845f49050eec85aadb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LD2445403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12769600da9e910dc99cba560b050202282321715588fbbaeca21adc6c5610a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZGXC2301185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bd458a82a83c03acdc99c3b317660312f755aab69adf6ee42dca8eeb249f4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USL4R2329595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd177a48e91e3ae515f13c82c4d9d60fb3ab9731dbf57e339261384c28fb6530. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES82371215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9119b59e5b23424a90433dee8c14c9c6f7ad9f921cf3de57abef5ea7637ba526. 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/QZNWY2397279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3663102428ed28fd81ad904aac327cccb952248bcc2ec1127f148576e28ded12. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWX2311810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0738d1e0de6394c0f649b35a7f2068f5d740b042ac70d425b22a4385c2ae270a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZMEN2335584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421c0ab43c80108f80ce6a654d5a1eb0badcc8bd0e6c6e6455cc94a94d4260a. 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/QZMEQ2352690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13595280bd915b9dcb8c582cb82f7dd5a82f8a16242fd4c856bcd99d69d1ab00. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6J2319598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39227662839a39c69c9c71578dfc5c55616bc26e9f1bd0760335fcc543f315ac. 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/QZHNB2343523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73384eec3f4e48c68da77a9c5359027101ac151cee824d587abc334bbe636ecc. 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/QZDA72317311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441135d6bc24d3942870d05683c982f8c8c1c94aeadad80b345e987d6a9519f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ32353248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee39b5fbca2e5e1505ac8e0e5cc031a2525b23adf7938a040f407235bf8622. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTB82294072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc79be731605242d6bb1da76cfb9e7cfc3a7055670f92fe30108162a892870. 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/QZFZ22323136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04463ba7cad1f020d0df1a7135efe643bdaaa46a90844afcad161b69ef35ea2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES92217718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f0ffa132dcf6a6ac8e2bc1590b0e0774fecb097f332d1611af180f07d924f. 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/QZFZ42132281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010774038683c11343b0f59a951d798438a8b70986ef3d9bdb068a82fa6610db. 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/QZK6H2154826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bac1df56cd536eee010933a694c0c2907cfaab89603cd2a5585ee538515891. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6N2100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf326c02ee13de3ea38ebd4f9f6a55ff2404cdc6f72ca4f477afb66fde1b08650. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA72163437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639c7e5016114e4042340e56c0af7ce9d2326f5aa459f73c7ced6e9520166d4f. 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/QZK6L2038713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c880686a0c49ac36eb65691a94325595f68396a7a13482fa0036196daacfc. 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/QZK6P2037162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe330de1c075ddb0f8c4ceb8ced782a307eddb1f80abf7c834f8f8f7f05cab5e1. 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/USHM22286358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec49bd89d7e632705256c797e523ceb0d3b6952aca2c40060cea2f4318367a2. 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/USHM22286359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0e651e1bdce04a7b5742cbebfbacb2c19d2dc2f97b29cefc705553cbc2b23b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM22286361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70e366b8d741a3539390221f185f48865caeec62fb545bb6b4c15aa8e5c6ba. 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/USHM22286362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a13d3cd3d56cd0bc1e845b0c7e4102d9da37db32cb707f2d7e287f151e8ef8. 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/QZWFR2493699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd422ced72448ddfd1c08d2e2336edf7894acd94c89c6a20529e855359d0bce64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAIV2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e403ac41ade9a16dd68a890ce00080750a7cd1a4899a84bf92a19e8d84f7f6. 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/USCGJ2263997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641323614467df1fff6691cede19e8e16a98fb53a9eade25e5660c423e938759. 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/USCGJ2263999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b593ad71323b56bc89b9a13d557cd7db40b788372a00d180269bf0fccc1eec. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USCGJ2264000.