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 0x85d2d387c56586ee3c43c2845b3f5a12f2497fdf7afd1a506a4ef9bcc4329e2a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe56f88b-d9f9-4c0c-a24c-0a0d93a69234.json and https://artists.proofprofile.net/proofs/artist/fe56f88b-d9f9-4c0c-a24c-0a0d93a69234.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 0x56abf406ddea1fcfe1dc5e5138ed92f0e3280cf8d2a13b4a119857245a1ed0cf. 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/UKXN22433964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f54ede18336a9823198853760d4844e92a123b3a10c452757d98b3f1f37c0a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKXN22433960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a828db7ddc4c9f77b58babe382b385a59156e08cdc871fa831d5bdc9a6ab36. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKXN22433966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b3e26939aa9aca43e1576f1d12b9fae75b4f266d55b091f42bd167068dbc1. 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/UKXN22433961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d6c81c337f4a74520fa6ed0966ba9f251122a7108abc774cc7479c3cfb63dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKXN22433965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d56c58027e055900b1b057c49c5eb78986fcc02cbc3abb1ba5ae413cb4413d1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:44Z), 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/UKXN22433963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f99d24150886ecbcbfd10365025fc8bebab87266704c910cf1d27dbe3b7df. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/UKXN22433962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d5879aab70377afb8fa764699dc24806cda4124ee76997847cf525dbc168f2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKXN22449696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a03f022021b5277c63648de0b2a10663cf4913a411c396d541d731ee1867b8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKXN22449697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cf9382c00d64e5bc2951d3344a7ae408d684812aa0f112b4b4e566211630d5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UKXN22449700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965bd3cbd9e377742eac754043d06987c925ff688afa42d9e87d162663de45a2. 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/UKXN22460468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962135539da05084b7f3470eb6b9469d610af7ad8da092fed030ef4820004e0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UKXN22460471.