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 0x31fb9a7457e5271e2740bc49216c02dc25aeaa968174809445bc499cb198658a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84054ae5-162b-4389-a4c0-e16221f122a2.json and https://artists.proofprofile.net/proofs/artist/84054ae5-162b-4389-a4c0-e16221f122a2.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 0x8a1139f90f2b0a05b0d1bb49b50c6f9ce97c9952676dcda4436eed2e9f4d11e8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GX8KD2397568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4fa8f829aa557dfbdc0f184154b82cdf935004cc6f657db1b76ade6e22de67. 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/QZNWW2303741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08390bdf57e089ccd12ae2e8ddec97936581209c4b1901a1f9b81df5e0d85e5f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBF2322355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f53ef2f6034155d86547a4927896bb9b4cdefa25707b7b961458a814a848be4. 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/QZTBF2321171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ba97e8cf839ee21d51fb4126a2de6ca3b34d0ba9b987ff6f60c7401f72bc55. 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/QZTAW2416500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5dd73aec39fd20215e55def68525b3f8a46f8682ff206b258f00f2ea7ebbc5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:28:37Z), 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/QZTAW2416501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6386a54f426db414dfab284b1004129623bb9dd41666bf6a7dcd0537d046e8. 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/QZTAW2416502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8301fec4b0b65ea7c311d33584de8b388ff9244fdd651c4987c583a152b1c9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:52:14Z), 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/QZTAW2416503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a1fc6d8be5a9ca03b389a7cf4f61a18e3de12b5fb30e912dc0e8dd7ed31f2. 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/QZTAW2416504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ed11992bfc6a58d09ca062a1b9c95383e4a565f778ec74f97447902f72534e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:49Z), 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/QZZ7T2440725.