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 0xcee85ed28557aeb6613df390eff0bee3fda82171df258c1081072f7a69e78e13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e0a78bd-7641-4f31-b4e7-d9af12c2bd2d.json and https://artists.proofprofile.net/proofs/artist/6e0a78bd-7641-4f31-b4e7-d9af12c2bd2d.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 0x5416f4817d4a98595636388a89f4d0bf2bcd8591448855554af6cc742de8ceb1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ3V0905762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e178c9791fdf1b90ba9c6aa513d35edff61655ba026d3b0fdfe47185c17dc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USJ3V1212972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99710d2733325ee7e231c4d0d4a68332aefd93f9c5a86a0c6023fa647374e9ff. 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/USCGH1760299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09494ed502e54d800f56339d6db739bdfff911c5df9dfc3adf4ed0f566fbb93. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USJ3V1453957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4483d228cb1576984d1931cb8c31c7208ee70a1eae62bbb66762b151ea5c4. 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/QM4DW1844157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca5fa20bdf02828d6fcb294a387e8554962a8647d8e807405a39dd1cf23bff. 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/QM4DW1846616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569d07ccf0f137bbb91cc51e8d70c387187cf58df22a72916679e0640c43ad0b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM4DW1846636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48ab35957c07a5e7d1ce9d14104fd1e7a9a854b9b96903dc928efcb52404d0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:20Z), 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/QZDA81876459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac08a6f20b5aed53e591b3ca824b6688ec846e4fc45877a903fa1a875e7d99d. 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/QZK6J2136025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aeb4e45cd852f56757c581f58f9882d76d5f0a7b0cbce4d4a3a9678ea5ad00. 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/QZK6J2136480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7549151e23a7757c81b5e41356bc1cb0cdfc3a1ed6a6a3c6513f3446a1fc4039. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ72332787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cf7541c237b8645329719264d641e5680938cc5b6892dc56ff1c524255f5ab. 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/QZFZ72333260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa434321cf391b20201d1eca4a8b0b7439c0edc65a705c1f3e93c66d8af8dc42d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:20:21Z), 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/QZFZ72333262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4daf912d536d08ae1ea7f8ffbc5ff9df8a771cc51cc75e0d53910121b3746dc. 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/QZFZ72332429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3d0d76a798d738ec204e77de255f46e5592508502562623ce752b1f19bd17. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZFZ72389640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6df4ebbeecf422a36e0d3e3c685b90dd94f766c2b520c2c70d5814972aa50b. 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/QZDA42353167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7d60f7e95a1f566effc3e74a85b665ee2bf25a278e08db0d03de036906cead. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA42325279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88c889d69f5aa916cc4c0fd0b1c1946247b570ebccb2b287408a5e725bd93a. 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/QZDA42325009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77de9733b6f911e720020089ccdc60c5a551099e5dfde432077dd5c41729b0ed. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDA52303049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c80417f37037cb9385316b1f05b470724a4cbc34831af103d405f1e145006d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA52335217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9d0ef2663bb32c68bd054f15c7b6ade676b6414d0f37bc5625dd41667db61. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:49:42Z), 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/QZDA72386454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea4999c58996a3ba0135aec6fd12aab1a6ed4d74b2355ca9bc7d1fdf81f0c76. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:41Z), 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/QZDA72385408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fb9e293c29e51e364461de392115070971c1be00f634cffdd7b198ffd0880. 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/QZDA72386023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414acdc7ecbc6b62e4bab99ce764639cf35cb25c02d0ba171a408f43fe692014. 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/QZES62383642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9ad28109cc5773e66fb5c0ba1ac697064ae090a448e55538c1f82334bd159c. 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/QZES82368384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b05328b788e595c17cfb8458a8308b3e44f1f608d27e8ed4cf38050f95ccb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:23:30Z), 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/QZES82392856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d07743b79ca86994cc35a931502b12fcb1c023dde6827946480820a9143acf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:50Z), 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/QZHN42308378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256c0ec98f8181a69a62c4178b3bf84eba0539eea6b1108266a9c56626848520. 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/QZMEN2329797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d53725bbdee9004c045159720ec213dd3c72465e8084289d94ddb9f8b8361f. 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/QZMER2338191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1103103f1eecbad5d31a267e9cc7f925f65ef3be45457d2db96dd345b457bca1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWQ2344104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7acc2a48c14ea065a7aeca6fe585625ae102e91ff57ac0883b2d05393dd2d0c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:10Z), 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/QZDA82493859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf962a352cb4ca4cd7497446f1ad9708a4d358b8fb758092efcea788521647a8. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:53:51Z), 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/QZTAY2426046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026b0ea1d04b87d4007ee2850ebb5c3bcc6188e5e3e0bbe595ea72933579b83. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB52459756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4095a21af6023a6dcdf09e9b6655441b4832473815baa0c376ce1de4a637a80. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:50Z), 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/QZTBA2458287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5417e8f65b2ebc1afcc551d7d6b0756b59aaae3a7216e358fa38ec500c8062cf. 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/QZWFH2422095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0c700e56eb65b22adad903cc9268aabe6709ac6ffe3ca030a1c319972a030b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZZ7N2442417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca571a5ecd5173858d02c636a8d4ad174f6e46827158fc1a5e373a58453ba820. 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/QZZ7Q2450519.