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 0xb843ab40b03936fe2e44a17a95fb5723812ec8696552e1e15e7de0567a2c3e2c. 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/e13bf198-c18b-43fd-8425-4fbf750e5269.json and https://artists.proofprofile.net/proofs/artist/e13bf198-c18b-43fd-8425-4fbf750e5269.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 0x57df9908b89e96caf14a81cc6bc0f590918b3263e54475da8758121daef16387. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZMHL2303796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6853987e374089129b15f7de885138699d456984c11d992b92d19ab7a0c1a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHK2308056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620975d62f0d9567a04a5ee8644bd513e1796deb8f5c7757ecad9490c1b025ec. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMHM2357356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e831c5dc89a1448d7c985b311d0de8d0603315f7ca0d2350889c54d8ff43aec. 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/QM42K2396914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd97f6f4453bedcbd41b392af18fed6c7c8f75ffecdfc987631d538a0c5a77. 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/QZS652344907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88c99ea5c4278ea1bd728a9879d0f3374ee109003a5074e2a89a9515ced28a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZMHP2390426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4108c4c6aba7e062a01f823b3e9fa8689f8b33edba485f29abaa1f7061e00. 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/QZS642397164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1090f08d5c4b047483555b24388435002bb1f5db954d82f4a34bcd317b9d940. 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/QZS642362567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa173096893fb2b6e2d537ba73f98cf1a7009d6f5a8fdb0614fe27e0e30546d29. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMHM2351278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30187ab3309c6bad860d7510a24c54d78b9341a0da28ff21bece900b4328d2a5. 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/USHM82442365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a5500d6c6fdc9cb819c8be6a29b3c2b63a7fb7417b287413523ad8d20b9b32. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USHM82442368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4735a4737cdeed9de19aa25a1cfd23dc5415ec68b924ceef1da9c60ddd6619c5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFE2493873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a534a03876b854ce77962436c2bafd3bef603a56deda9a2afb7017abdffa94d. 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/QZTBB2437920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40aad7bd286cfc0dae15f8a2c6b7d02b117333b5cb46692f8c4ee50983b0b11. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTBB2431048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b8ff3f0dd4d967860816fe626d42dc93b6b837add33f3443a603221b7098c. 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/QZTBD2437933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491ff81c78fdc9f64bae46164cb95be5e4117860cdeea44403d46d8bd179d5be. 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/QZTBD2437928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95246eca0aad8bfcee3756921d9aa34098fb8f8d920d5eda6341f154b489aae. 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/QZTBD2437927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40aad7bd286cfc0dae15f8a2c6b7d02b117333b5cb46692f8c4ee50983b0b11. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTBB2431048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477cd3278d9543559f1910c3375dac46483d83c54e8a2ef473864df013fe772a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBD2437930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccccf1211cf1d17fa532b2c781c9158b2174b60004d0ff0b9c29ac113aa3fe2e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBD2437932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46159d33b325c03613ee53969d12f3326f6f391bd3001cbc41de6c8060b9136. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNWW2592467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e35947c4e56b2c51a1bd6843d1bad724310b013cfe87144eb2fab3785ea14af. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7R2557134.