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 0x3de73eb0cb9bfe594cfd8d69ff41565bfbf263bc6a3c76337dc887e59cb0b5e4. 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/2f097456-9403-4a30-bd52-671e9b3fd1bc.json and https://artists.proofprofile.net/proofs/artist/2f097456-9403-4a30-bd52-671e9b3fd1bc.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 0xafa094db13ede1ecbd7c37865f4fa9d22254cc5e9619a6781fc586a797ce9f11. 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/FR59R1905911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fe613b3261eaeec826387d11cf7eb39d1893122865290e57ff854b847c3048. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR59R1905918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb918a1f9879ac3820bc094a938cf96d67253eefb5d97561abef1fc4b8a1ace32. 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/FR59R1905870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde13b0a486b8615ec254c1f6d9c4d9feaf6ea8e1b99fa7ab258bca2886ba7039. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR59R1905913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7c0b2b699d25d6fc0dea3b922996149e3eef80e3765ff47d7527456da78e0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR59R1905919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aae4acf481ff87d8c307b734be008ffbb2fc3305ead8daa6d10c644236674b5. 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/FR59R1905921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5441fb1387833df9599e0256ad49d551e7248594374c9e0ad5dad95a026a45. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:44:36Z), 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/FR59R1905871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b723d0fa2233ae089c451b631a6b39b7cfcc7466e2143dba1792e5a149e2c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR59R1905893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40155863eb81ad64154336a57857e4867d6c8f0915278ec553017851ab5f2ba7. 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/FR59R1905939.