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 0x09a5b1ded501bb0f56529447e3cc4fdda0cc2985aa26da8e2d049420f082849a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa3a9be-e4d7-4896-aea6-48031f7afaf9.json and https://artists.proofprofile.net/proofs/artist/eaa3a9be-e4d7-4896-aea6-48031f7afaf9.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 0xc30b3c61014f65b50b79f01492efae0fad3026826b92d9aabea981479bbdd04c. 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/USHM82262449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8023560dc41d73612c1a43d91e38fde04e92918755583289cd1572f2013ae1. 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/USHM82262450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c0398b9fda7916d6c1af8d4761c909eec73fa72a539eb9f9e1b4f0c5ac5aec. 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/USI4R1056473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3ea39e3b19f3d3a7eab2aeb86387f6e0c6798e255b4ff5dd7f69d4335485e1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGJ2290722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eeb6494add1be5cb34e65cc02b88048158334f2a2f3196cd2a029d1026dd53. 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/USCGJ2290723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43224987aec67631866d56c08721d6a091dd08800cfdd3baddb8e3d3978629b0. 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/USCGJ2290724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6482202f821dfdb52a16669bd3af029cc69ae28eddf3a7b4b3b1499542cab. 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/USCGJ2290726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b90159f5b4ee837ec53bfcf525ec8898ed471256d6ba03d9261e5f59ecad1c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCGJ2290727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11a1982c55581c6c2bae2d59bd97061439fcca5c59c396f82a3a37e55533eea. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USCGJ2290728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00267652cbf4a49f82674a0b0b93f1edeca7e5233bf72a92ee518c44de4e3a2e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USCGJ2290729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc57097d96afd398d16a7a475f59c2bfae51732fad21ca2a5f8f28967ccf0d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGJ2290730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8789451f86b2a257ddeb0657788c274733fd821cf000e1dd5731466b20842ef7. 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/US54H0112045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0f342d8e8415893bf6e5440dd3bee9708e5f0f26a7b94cff946d2a8807c5bd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US54H0112046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4835b1c4429c36323476123af4385d83eecda0809852d0fdb15171144325d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US54H0112047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52430e07ec2fd14d3ff1b61bbc9696bc3908807a448cb1826a06e92a876f4c3f. 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/US54H0112048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51085f7f586ae37418b3d32041c303ca6be7543dd66a0c60089eea9cef3f3f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US54H0112050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72509bf01a850d17c953769d7b23380a2b14b31ff3c84630b8eb3315aaaef25. 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/US54H0112051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2ca62e082648ec6f6a0c674fd5d8c588aa40880b536cd690f3e06a8a79cff. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US54H0112053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16af72bd7890dc7632ddff7ee4c41d8f3de5b28f691dff622e1bc398133bc85d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US54H0112055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867ec77b9340d468b26d2372774b57a6f1c8019509feccaad298a27c6daa909. 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/US54H0112057.