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 0x5ff7decc9e0c26821abc6361b45ecfd5282e207528b94f0133fe24cd5de83e3d. 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/e28b0ab7-458e-42ff-b37a-ee23a356afc8.json and https://artists.proofprofile.net/proofs/artist/e28b0ab7-458e-42ff-b37a-ee23a356afc8.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 0xd4b24c1c570066f5023e284c1762129d25e30334503b57ff063d84b194e6a52e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:36Z), 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/QZTAW2277841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4c1515d41348e17715c4cf9049c0358877392606a5556ebd05f14de7da8c78. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTAW2277843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb05ae73d9c20bdbfbdb25c3e933dc5bf181aff11afd66746413bae51f670db. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:29Z), 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/QZTAW2277845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef4dd39c3ea4d67952aefed59f4bd7a13c4e92a82b2b5de9f82af390240852. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTAW2277846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204a454189c2ce1457df6f9df59d455371e3527fdb26addd2e7673d19ef440be. 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/QZTAW2277847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa23d6d7bddf42837ee6439ea96820a725b51f863631840812f9ffc85bcd44b. 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/QZTB52207307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69229f7b412829766b59fc5d914b7629f5ff75c61db4a3d75faa1c9a2e51f2f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB52207309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acec48bb7e85e92f22ae1655cb635b1ab8911b56bc4c36042a7088d56b18dab. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:09Z), 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/QZTB52207310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b009636de79077bf360db5066d6a1c1ccf052b6f46d693deea8fa59b979b7ed. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6F2334105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066980b03f8462251376452e2388d8206db597262ac6b1c06235e05d4d61057. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:38Z), 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/QZNWU2314143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d39c20ca54f9655f88e09da7a302f0e973a13af4763cae0ad4597be7c4e3b. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZTAU2326266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6767b8cc8f6f0b0e9f37762ad7fcb32e870426b9a4a27cb15a1305d0830809. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T18:24:21Z), 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/QZTAU2326267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f4474e2e1e018ca9993ec05d4aace5612fe098343a61595c1163d7492d966e. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZTAU2326270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78cb63c9b8f5b8103ef8d36be88fe7586ebe405bcfbeeea902058a4b7d13a7b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTAU2326271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da7998011e8594628ad82eb7c860fffda5ce9d685117786f490d5f289a0a27. 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/QZTAU2326272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdff826574b11e3ceacba0ca7b682050932f4e3ede00e53aa4ddca6365f083d. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZTAU2326274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a2d12bdef38500c4a26f365cff34a68a45a05a23644611105658f7882e9a8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:50Z), 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/QZTAU2326275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034b6c6f93a65b1d32bb1e2f038e46a3fe9763bc56f463fe56458b2b4cfe966f. 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/QZTB22353943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93305417166ffff656ead531665933b2f959e234bb4f5cfade9ef30947adb12e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:30:17Z), 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/QZFYX2416688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc0727ddb50515d3314b8cb61fb2c9d1b207062639c0f80846b5d7eee9f2b6a. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:59Z), 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/QZK6N2433165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60d1b06ab35e8140765cd09404efdf92f40796fa591069e78587158113ff54. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6N2433166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fd23b5b43cbf91463ca594260ba551233b594908c6474b4dd85960bd5dac44. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:15:33Z), 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/QZK6N2433167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec1f10819c6a877b990f25b8303f56832769e4f5dc3b79e5685d10c9d2599d8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:01Z), 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/QZK6N2433168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85e74ba7b7b1ca3e3421e4c99d700002a217cf44164d43e33418a5c64996b69. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6N2433169.