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 0xbee86691ba509567a5df639f4e5cb68738e24c453722a97557598e6abb175034. 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/bd75e1b7-e2ea-420d-9deb-a37a06ebd223.json and https://artists.proofprofile.net/proofs/artist/bd75e1b7-e2ea-420d-9deb-a37a06ebd223.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 0x4a5bdbac67874122468d662e89e45809304522bf3c431d1e0b54ebe2bf1cee48. 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/GX4R52345000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c505a51b08b720fb94eac91eebce9efa721e2c324f0c5a2f86310db6bfb510. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GXBDS2371547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4ff1961138a1fa0afcd60161339c037bf7e8b3b2dfb20c727eda20fff2db44. 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/GX5MY2317378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc6c0c5af28c305a75a7b3ce530bf9fdb4d168f2da4f5a0661a01f47823a51. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QT2VB2413847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999ab229a14fcb4e8f631a7d3adba1fb3c7ee8809d6a35b7dc67c76a841fef9d. 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/GBLV62417053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c57a940e0882c48453f246834b49a13109e610aba15b9da100c4b2108b8e0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TW2563756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9219ad2586d0619d3c0a5b502e4b67a78bd7b98b89a8b9d702ec60a592be2045. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2501587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8bb91a9e5270ac5f5f5730ecdaee956c61185027b7da33c805ce7dd12f65d. 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/CA5KR2516020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca00844cb2eb3c0c8b990c8f09e6b4f03ad472b581ba4fbc2f40a955978238. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CA5KR2516022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2d0bdb76ff408e9e276087d51288eecf677cb39e1a34081bca8aa8f917512. 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/FR96X2555017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe645225d6aeb7a9654c59904c51887cca75ea353457ed0daf647cadd2efa3018. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:01Z), 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/FR96X2555018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216352fd1e0969f5a98b2fe18db66ca9fdf79a8241df6d5f7bdae2b75ec6598. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FR96X2555019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5a1b90553f976713cd8f9c9da52b351ae345755a7fbc5ae58966e40238e5c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/US3DF2548020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e9c26d0ee8d7cf3d3fc0022605cd53e547885ba73cbf5a3e8864348548d091. 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/SE6XY2588858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631c44df468a6c858876d0b58697df73f1b8ea0edd9dea1149d5dc313a77743. 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/CA5KR2538898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edda3d715018b4dc7d218929b00f1cb4203f53205e07b6764533d982cc9792a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1741217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520e1ee532cc6ef2ea1fa0513ba182f46407082e08ca21cf5c2a2fe0c6559cc6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USUYG1742252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821fbee28c68560f6f832cac9ae9f3d065715cbca6ae978cf89734d15ac460d2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USUYG1742254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde58887d5bbf0ff72aafdbc0780dde70c19a18406bb07b7cc08962c89a9e0b32. 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/USUYG1742255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ca2bd5d7601b0c603343b68b2947322ef0a0aa71a0d22869e715daf609e64. 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/FRX762509768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b97aa4a8ebe6e7bffaad8763db07950d58f4b856ba0f6dade8c120d45a23e54. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:55:20Z), 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/FRX762509771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd339b59476b6436eaad45119d6b8c3d78a1f5778531917ebd3ed14b524e5eb. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QT4K42551257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a08c74ca9ed24c3b9e81c326c35972310d6dfc6a143ccb746b57231e93960aa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2522145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de0b88c4ed860de91bbcd293c43c1b54b4c988fa87a022d81eaf1f365503f71. 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/USANG2522146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85e104eebf61f868cc83397840d4e922bee80f53cf182232bfb65be50bfc9fe. 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/USANG2522147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaabd72dd29253c34d5e8ed095c311880f92ff17345f8b4ee7f07fe83f39dc3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2522148.