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 0xb1c4cf050e3b1cb85bc1e07cc1254f345e99c7759ffe08d020b9f6731dcb7e0b. 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/a9e063a7-8262-4215-989d-7fdb9f348d30.json and https://artists.proofprofile.net/proofs/artist/a9e063a7-8262-4215-989d-7fdb9f348d30.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 0x6bf93e0dc2a9a220926b6100dfbac24a3303c9b035f77aad821a47b63b2d0044. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USX9P2051125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185e34645c159693bccc99c9df9a4318ff1cb7eecfa3a806f1e9752ee379c10. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:37:19Z), 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/USL4R2114084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf4038a766f9c398ab9185b7b69bf5445c7d0f818bc737b52c4242c57563a1. 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/USL4R2114085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf325f4222eab59f0585545629f67202c3ed0553492fddabab646ec108db04147. 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/USL4R2114087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324a5aa87cf0d880111ed40aed9faa480aeda86f7ef232e0f43fa38d76e11ffe. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4R2114088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf7cd379f20bbb700d6f0336d103a85569ca14c0a75480e9568faa5b1e1611. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USL4R2114089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbcb53b6530393d5811c82f62cfa4dc6fb1566771835cee8f450d6e11b190fe. 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/USL4R2114090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3243e3ae38de7475daed43c2be01b21137859a143b9d52334d7b48dd2ac0e0. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:52:20Z), 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/USL4R2114092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd715199fe807052f2a6c9b9ba6d01721305b0ba6888394d7cfc3d02b40c777bb. 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/USDY42299541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab80a438d560d04955812c7eb963f7dbd4655937db23b061e2f63e14cb90204. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USL4Q2294801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92891a083927391c2a1d9854e0ce2d1413cc54fe78d1351c337c3f90d1a5eeb5. 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/USHM22373500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081154a195a2f8f236d325c8caeb1477f83cc5d0c39b8908bef094b0046f2fd1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:22Z), 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/USDY42474108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c980b10ed24572aefa5421217cb2e9de3d8067daca8e00ab7bf3b813c656224. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:27:51Z), 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/USDY42551529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72baeb4ab02e0454a78cbf93263bcccd6d829421b79ad0e0e8cd16a500873de5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USDY42551530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a441a1bc0dddda5633a7f2eeb92a67db33597c876349239cefad35589ece0a6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDY42551531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433fd4314502661aff8f21e93027321908bbe7ce1050b34fb8d7dd9298dbc55e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDY42551532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44082e4d2ba2030fbf3b213414aff89cdf04eafa8440bdc53f21026c0c1c52bc. 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/USDY42551533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8470174974c9fbe90c52a0b6af0c3ab880b404b844b8a5a5b31420fc60c92a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:49Z), 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/USDY42551534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4f632f2bc891caa3e6ceec21d15527e4ddbbd775c3d819a77e04c8155a81b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:05Z), 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/USDY42551535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b909c02ee697961d9f4d4b0b7dbfd9019e273979077096e16bfb0b811c07f. 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/USDY42551536.