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 0x8a11208d7695851aff33263ce5c6f7c4e1f850450bd6823f9c92d1e354120b71. 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/1c19701b-bdcc-4111-8603-74f7036a26dd.json and https://artists.proofprofile.net/proofs/artist/1c19701b-bdcc-4111-8603-74f7036a26dd.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 0x9f2416bec5765f1c3f66f7c53ac2221aee10dc6ad0e8742d4ec9229246878c49. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/BX4E52302945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceaa945604b71361b584176698c9c75ba898a0ca5ca15420de0ee13b9db1a19. 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/BX4E52302946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951c8f7ec03af80fcaaed0580145a17e179ca68bcb0c872ffac02f7bc0cff88. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:02Z), 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/BX4E52302950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd62caa88456c7ba864973ded7726303e151228b3a9393916cbfa2bc31e0ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX4E52302957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d40cc5494642c95235cda6f0afd5ddeaac88aef10e14ef10130b2d40ce193a. 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/BX4E52302970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779ea54331e93bb08ac8aa5e90f08f0e92ea17817048b75ef0871450f0352191. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BX4E52302975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8a45ff8514f965c8ea06bc1dbc325aa6822e425a2bf9caa9c91acfc0758ecb. 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/BX4E52302976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7680c6d7ce12416084ffc33e78f2871e8566bd10f128ac8873170616d4216. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/BX4E52302977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ad2ed75e5287140d0ce6aa2d222d260e6aab810c593863993d3fd0b05ee29. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:06Z), 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/BX4E52302983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae98aeccc47dc892d30fb4597aaf78066ce30f168f0a7abf11d73629b7997a. 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/BX4E52304221.