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 0xa6a821d2e94206fac791b11ed5378462cf0ab269e43b76b63d078d93942b8e24. 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/e71e6fc8-5b62-4b2d-899c-7f149c07972f.json and https://artists.proofprofile.net/proofs/artist/e71e6fc8-5b62-4b2d-899c-7f149c07972f.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 0xcd6213ad3be48cbdc7afb5d007cae346310ac6fa68a780374ddba2b8cda8924b. 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/GBSMU6304611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d5ea7749169411f261e3597211e255aac40b022676ebc53a91b0b1a724f41a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU6381799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e072bbecf23d52cb9aa77ddf5c7831d8c8e62648c788fe9ffad81e00ce01f1. 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/GBSMU6445299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699f4c0dea0b776d64f0d0925f5c7f802e4fe7b947ae7de93303e045218f97d. 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/GBSMU6465909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bc7f9216bc4140f692463b244c21ee99b165cdf5ebc08333a5999f4f0091b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBSMU6465913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d279f5f6941e148583395e890c5339247f237e9f4130a840d565851987684. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBSMU6465914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f820a2a5ad96199a19c181f5c979d4ec81710d7ab6c6aa22fe1a1e70d9bae9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBSMU6591286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10744f744c87a6157a9bd3126a57f0689cc7fd1d4cfbf71228944b5c7707f32e. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/GBSMU6563793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cff74a96000ad7adc2f8382ba5aee789ba8ad072d6e229bfa27e0971f0a15ab. 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/GBSMU6930566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c729b2b2d2f8043c31d36331b48b4315d779d33ed9eef7acce724072d86d68e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU6977783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6547e2412862be811831b354b344e0586cee8d5a01aaa549538c8b676a757f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:39Z), 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/GBSMU7222706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2b86019acebc22be74eaff9b675cc4e96ed3662d1b617fe8006a4feefa245. 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/GBSMU7222708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3fddc0953aea2561b4c8ec684cacd3bd23ca10648991775610f75026014113. 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/GBSMU7222709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78caab8b943cfd15805fa77a7f75c87e1f60004e0a2dd6871c7e968fb7aa2528. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:25Z), 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/GBSMU7222712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1be2528c032cfbc098b101991fa67d80d639b6c1418a8121a60b1df5ae2d0b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBSMU7222714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eec5956b2823a78662b21a2e878f3be3ba253934a4c56d417611f6ce491dcf. 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/GBSMU7222715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef6d62215de70c7b26663f6436ad225840629a24ae7763eb48d5331f0c4f3d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBSMU7442895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e6e4eef013d7c1efbd847efe45f527a54fd3c4aa8f75bf68be991a1af7877. 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/QZFZ72088417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118cd7f039521769e7ea104b2713b8d3948915fe707ca0428a5be9591463acc0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZDA72087186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc047e7a0c4e350e55ed62d3403dc60b28c4908ec07aa8ba08107b83407b7ce. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:40:50Z), 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/QZK6Q2021684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77db775c9c01a128835c24371a661d6ba3ff21552fd446a303e56cb4af89bf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:24Z), 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/QZK6M2009684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff33687a36d271918a81e95a8ca2783f67cbfad0f349969ca63ae8fad92d6d. 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/QZMER2038248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf232403d4b5df4c47faecae2291eed248acdab3c6170181847ed08f4026e088. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMER2038250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb2766c8c04cd86122f4601be900029f6ba4b37c66c1bdbebd7d87d2f73323d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYY2163348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c50ae6c97bbf4db41780cd9559d42135ed8f66862af40bfe88d98c00501b6. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:00Z), 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/QZFYY2163353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce4343f971bd1fc727706c3859e911515728d3c812271994e898a49e7293657. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:59:04Z), 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/QZFYY2163360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b21686a9c7319491b2e6c0601676ff34df22279153924726a2bb36aad9b411. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES52140038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71965fec892231eaac9d6c784a36289dbbe2a7b61c1bcd47f5ddf4605ec60695. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:47Z), 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/QZK6L2109253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a90e3942339f94b166a46d02b4bb9e7745009ec6eb2f46d1b6929a4f707b9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWZ2148622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6607ae2b5e6a3a73b0ef95eea07eb941a28239f189b633e6e0e8138f283bdf93. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMEP2297641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31b94508068c61e7cb139564b703c80cc832708d78dd6f383a132d76c3f8104. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWW2251468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aac3c175174abea78671d99b6ebb95877572f6a6066ee0741ec7059dc56fbe. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA52397817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4385a002eddd1ede77430f9ebe42512122e2254a40b3b87a359a0dfe061bee5d. 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/QZHN32325372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bbeb940e7eb1ac1b1488c2b62b8920cbf368fe8413c2a013538ac8e38baeb6. 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/QZTBD2377317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee1463f258f788f7c82eae87d621f81402c351f14a847e85cfbe7c2c22db9a6. 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/GBSMU7413065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b245340a331aa4cc27f3ffa535214bbfbe90b863f9d4e2b9b9499f9d19dfd. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZZ7N2457668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b4d1156bc1988c378107083a1babbcdb93c2e47665fcb3961750442e76f5dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2196598.