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 0xa836af9a36038741afa442381d148b3326246936623bab6179089fb5756b2f72. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b4083d4-47ef-4b52-aa22-dee1efd6533d.json and https://artists.proofprofile.net/proofs/artist/6b4083d4-47ef-4b52-aa22-dee1efd6533d.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 0x2ebc3eb1377088fa3cc6d50a7fe56201eb95427e3fe07326c55193f293ca7cbd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11003856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70f02f7d2dba033c6ae9e5980c56dfc70ddf7fdeb456dad296c1dfab5d68984. 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/FR9W11101250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44babad03581888965dc4cd87579dfb8017c364024d185be1d5e3124ef1e3cbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11003858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2586e2425c8c0df41125ac83e69814f1c29238d0409d45c7039e26837376e19. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W11101251.
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 0xca2832eb31cf19621ce1a31ec8c61629dc9ec141f0b93201914b4a719fcfabca. 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/QMRTJ2400618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e3ebf455ce5e41bbe612512ed985918d878d28acaf8f2b27d1c9a7dc5066a9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMRTJ2400619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77e1c45b29bb8b3cbc2f5d79fe353da87f5400468a7cfd7a8e4a3f994308eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMRTJ2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cdb6b745d2f9fb194b6e67c91d36c72f8f4257366c0a5db28c9be37243b21e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMRTJ2300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a3579df6bb3d800c10eea7f2a2d0117ec93257e11a909ded871c989697cff. 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/USA2P1932069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192d40dd896d37d4c86da769a7b6edc5948e464db9900c2bf36519b2239208a7. 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/QMRTJ1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8a90b9cfef6f3428e3c5984a9f93d1f51da2c80b6c9b28bbca3aa4b2827da. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMRTJ1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1a446c649523ee19c62e9c9a1c056f9a0f6bd2d84558428e242a38c1a85721. 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/QMRTJ1700516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76329753c101ae19efe9fc5b69b3db00faafc67134f51b3718921db0075af210. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMRTJ1700517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18287197b4b012d168fac28cc68e1ffd9a92550661683aacfdf333f0c49914e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMRTJ1700525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5a1f721c48b618f43b09a4fa3b7d56b48fbc9c38f88ce55958c83a70b7f10. 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/QMRTJ2000650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1dd97c7c6f0fe420d426a604f6f8304e5356a3139db9b624c2d5ec599a6dd7. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QMRTJ1900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e726501117a95dee9faf7e9bbf5adf5c164dc44284c6e3a9d618151d0bfa7e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMRTJ1900572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432dc24abfa8b24a7c4437a5c0d0e1d2882a05d96bbd7a50ede1ba5092ad1672. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMRTJ1900573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb403700a2e9fa2e17c5e06a0ac75c045817ae32de594cf4478b37e0a15d432e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMRTJ1900574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38e0eeb616d98f8d0b4ab2ba89d583bc95d0f895e7ade8e9b527df3c84d89ca. 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/QMRTJ2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a050b5de2053ecb6bcddfb865e268120a249aa6555c46932e54b26b67968e39. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMRTJ2301021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de8ce04d1c1412b10b10e1cc48cd97ff27b2ed69051e5fe245bf7e945f3159. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMRTJ2000709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11728f2215c11db2111cac0a66c29f612cf695d8922a3546cdcf5207a96eb035. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFP2367463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f0dd9fe7874fe4e16a288dd166448335bd8d4907c8d9ad4600f84e122d073. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWFP2367462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668a453a282080e6aa3c51eb5c9397bd646e7d6ed32fdf9aaf517c472fbc798. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMRTJ2100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20f2837f01d4ae0ff1db45545faa30b512179b50026ae102ab6334025bbe992. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAS2495024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081d2874b13f4daa41257a64f8acd347963467eeb6da0f7502878810d682e19. 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/QMRTJ2300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb6ec5bf8a00e8c561501d53904052d7a19533e59455ec651e19f77c7bd62a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMRTJ2300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0337034a97e65b05b9c7d9234f90765eb565a661589de102fd53b5105125297. 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/QZK6N2179497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd016890db0fa64d4b4ac45dc932f26fc34c9821f27ffcd43d84c660fcdcbe598. 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/TCAEH1965544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc255efb6ef631c72369cb1473ac2fcee8ecc886d474d8d65d812e2f21ff0bd. 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/QZK6Q2280823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd411834164eaabc6ec6196cc30ac54b81017b67d77ece96254f11e02373bd5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6Q2280826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1968770270a0872ad6401c1338dd84cf18b5367483b06360273e1e012586819. 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/QZNWT2107540.