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 0x148f5641c5dad55f84694b8a054463f6c1e85008d8f4c7fa1bb25d6c5aeefada. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecf67b79-eee5-4c38-a36b-1e2d81c4be9e.json and https://artists.proofprofile.net/proofs/artist/ecf67b79-eee5-4c38-a36b-1e2d81c4be9e.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 0xeb82a5e2c1a28b85d13920fc036d46f997491a0431d49429a6564be71e60c3be. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:53:22Z), 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/TCADB1702066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c10a47f699ab74394960919649eb4926406f9e321be0e01e3cdb5c66a87ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEF1945839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a811d34d8073e3e723e43056e6dc6636a73dbc210e67877cd295498806422a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEQ2023727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81048b8a0bda4ba5bfd1489bad3eba697d53710e5521aa7180801b612e45a1f9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAEX2085762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c61623d44529c2c45ff90cc988d763e098397aff2d2c57f0def342842f290. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHD2315231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec056782816f9158cf8b25bad5a37364a22bc653173b0054a2ea45bb3ce9704. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:02Z), 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/TCAHG2335639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9131f4a4dd3f20f072b3bec2c46d6f0b602a48e4107056b48698d7043cce0. 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/TCAHI2344345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376fe2f5865e863b98558461d1d2761dd57c50e529179dd4c3fed3befd618a4c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAHO2385592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb486b4ecc47c7d6ca774f0287d7d02ebc20079e7e1c4ddd578c77117ca3f28d. 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/QZMWW2492223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe821d91522e592c1738111e9264076dac3cd05c409a5a15d6809d288a457125. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMW2409641.