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 0x30aeab7475944891d9026cb73d7e103cd01a36dc028fc3c137ecfd0bab961643. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c8b3d0b-5aec-46af-ac38-e135581feebc.json and https://artists.proofprofile.net/proofs/artist/2c8b3d0b-5aec-46af-ac38-e135581feebc.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 0xc98bf91afc3994b7f8d922534e93a1fb223f1a937eea5ab148a333e7cc58bd0e. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/UKXN22453271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a649c644afdef25cb6cd0d3c76846342d89088f0b671f2ce542a9ca411c3a1. 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/UKXN22453272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80225f3be85e81f74c559e2ea52dfbb5c723203c349b772866bf053515144bf8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UKXN22453273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315c93209f43bc66b59e97fc5c96312bc129efe7cbf88ef508296782fbe7218a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UKXN22453274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa952d7d3882ce950e366709097707f5ada0393371db7b9f32a374ee24dadaed. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/UKXN22453275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef311cc419f77107c3f74aa6f478d9a435c507ec3a39c15e9761f7ad038e3d08. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UKXN22453276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ad972c59f0db4b2840c735e378b2e610f53b710840e7d81cf9046ab068cbb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:44Z), 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/UKXN22453277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d0e0150a49f55575b6e9ed8a3b9b912519add743c49d5a321b0bbe343af5c4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:58:35Z), 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/UKXN22453278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f1d7b852378bf969c1e5ee86084e983e4f6d7eab81d4e09265c9577075ef6. 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/UKXN22453279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b1e7574189d078b58b3ccfd550bad5f1d95d3c3796784dfd19b498e46511b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22453280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dcd47220a44d6fcb983bc967f1eb70793d524a689229faef62f6cabe7f9918. 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/UKXN22453282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e792b0d9f63b2b6d28eb6b6357cd2a8caac9eda462f76517349d77c08fa3fd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKXN22453283.