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 0x2fe0dc3037ec95ba4dd593a738068a6c524a2f457423a608e1a1335a7d823c57. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fe9f318-98b0-44df-b51a-6c0483140b0e.json and https://artists.proofprofile.net/proofs/artist/3fe9f318-98b0-44df-b51a-6c0483140b0e.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 0xdbd2c2a817a7dea0b73fb34131cc3b2c910e409d680a48cff7ac9968dabfadd7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1H2142770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383601f6040e6d8667d86f99d91e624054380da51e6278f3336a0b4a9560d94. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/RUA1H2142771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf645c6fb342f4d5b8157ffade50b42a126885d2b2fd1c6b3ab02cae4f7d5a. 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/USHM22152968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd142650fd978b6b331ce7e17c73f8e31e2556f2eb430d8063fcc633a13099247. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM22152969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e599f40bf12abce6817f03f2f4b64d6403ae851d36661063da69f4be3f354. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:14:17Z), 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/USHM22152970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb20cb8fecc7315db474582e49c4d56f4fa1e56d7b611aaa8edf026df1f9d3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM22152971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0df1139c015f03e42249893ef05587caaa517d5d991875beae98a2fdfd4187. 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/USHM22152972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcff01f601beb169f1f16d0e63f1a25eeb4e533a6225b4edbc8da50dcd8e71f. 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/AEA2W2597374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dbb48c0919c960f646c9dfabcd4a84d94b07f75d75af0405b65aa1121b40f4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:16Z), 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/AEA2W2597375.