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 0xbd4ae62095911518047c8fa1e888e7964ff2f1b52c1f1a949fba1d5a8a15f890. 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/5274794d-b6e9-44d4-a7a0-7e222536025d.json and https://artists.proofprofile.net/proofs/artist/5274794d-b6e9-44d4-a7a0-7e222536025d.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 0x116371662e1b19d68baf75a7ef6a294c58d15f920e103b5b492dce620da0ac60. 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/DGA0L2371442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457f4ac4c7ef3add4efb2a6adb8c681d2055a5f48986a71506261206c079826. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DGA0H2310594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcd10f715c57efe938f653c985d4903bf0b4d482097face321cb65e39cae29c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DGA0R2337972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e5cc25401cde0e2f6b2cfc8a6bcd3b97d7827f64c92684c4eb3fe47837354. 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/DGA0L2389475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f0d92604961440910a6d7d3a5bb4e27083ee9920f6520b95401fdf3bbd139e. 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/DGA0L2399337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ebc8c2beeb444927dee5f1ce66d22b0e7364975f41f7d098bfbf1a4c38d65a. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/DGA0Q2351445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16b7a27664f54d0f0379f3652d81f2143db4088db76fef8b9c4acfc447b821. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA0Q2351361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002088f63f92d788b70739ef9befeee5e70d8821a174b9f6676980f062f55941. 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/FR10S2428875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5d6896d46fb10e99e6b1956b8b88d56de938857c85e676a8cebf02240af06. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR10S2401282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a16c383cc507c0aa8d2f9140f30a00870673f6ec45ae701e99757c41798a3. 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/DGA0R2303750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765da90170d5aa9d96fd2edb0d32992073260143afb45661f14ab51201a28e01. 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/FR10S2437161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5e9d4f42e27627b76824a3338e7d3412d922a46af3d4f93efca48ad2315438. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR10S2432807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23389545ca68728169282839849e702ce924b8769a6b3814793ef9258185842. 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/FR10S2419832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a63a86a8aad2c31df44dad292c6114c367c1f6c581bbb2089953a412d99049. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR10S2403206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7604ddfe0bc5222761c2e38aa60fae73da0b3a82e4ea33d3dca02d78e8e0bae0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR96X2419299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56ab33e32b7fd4b8f63dde75ffb6867765461811ba1a58bf84be6f80538f6c4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR10S2470385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2be23257e4f2745744c18321afc1453e781790e4fb895309d6a89ff29f502. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR2X42417601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ae901613c7f4d121e869cd0b7792292d94f25f4336d29a1a88cf32452e280b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR2X42450481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8582c876888025f7d007a3e42fe930fd2f2597f81f7945a5239412e3daff5a88. 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/FR59R2466398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ecb6e820ce561d9598d90ef84849fd613f5dcf44069c42a30531fbe91752ec. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/FR59R2465459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ce9e426d6e275db23170345ae4ba3475bb7fbc296104d5acefee40e550cd3c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DGA072437496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26345dbb9e9303fdf8d6f126292dc962fcc761232dc294beeacf16558b8c97a. 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/DGA0P2462591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8875f81ca4d3de5d06210cba792fb52517b5b41469a105be87e165bd42cbbdf0. 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/DGA0R2483713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef6c87a3deed324b0214fd4057f896eeb7d1562323901266c7f3bd2e0aaf500. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA0Q2452782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4864c2e94f55583286e7e6849205835a502e780fb355547a147513b0ae8544. 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/DGA0T2404778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae09cbab64b656a26dc9869c6587f47dfedb808408d32b9e1e017f513c2689c. 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/FR10S2571501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ecb173efec25a3e7b647f449cc5cc8584c2c7497c5a747483ecaa4e22d94e1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DGA0S2495339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbe5512081584898c66bc0d08500f427b58dadef169e3151927d0778058b2d8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX202561238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a45675b8f3d8c834a2a6c96c1d8d0ebd652eed18e6f35548ee9c281d551b63. 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/QNSM12503856.