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 0x9f99887169ef11a91f3242f5611543a0a669ce586021d162fafa991870b4c1f0. 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/d7b11407-fbbf-4f61-a9ce-d24b2c60898a.json and https://artists.proofprofile.net/proofs/artist/d7b11407-fbbf-4f61-a9ce-d24b2c60898a.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 0x7d8bc116e6616663b8a560384e7557ebf816deca67a25a6e3060dc7a0e186104. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:26Z), 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/QZES52319686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e324718006611b538db17dec760ac21e371a755007232fee39bdd650e84de. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNJW2370580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dee00026f68e86cb44f8f73446e4eb79b5ae1f59f79feac58e12f7cfe7c600b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAS2334495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e01e0c6ac7f084f0eedf3fa01d95e85323d6ac0db34101880ec6bdde978e5d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6J2445007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec0abf79acba2810cd1af915a9ec75bf9b0389db9c3c27491b78be46c0c17dd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:11Z), 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/QZZ8A2440643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0053307db02682b7f65d4a3ba8eec2e1097ba6d681062a6a53a2440e9ded7. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZEC2468833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0269c645e4947e38a7830f0ea099a9b072c7d3b430e002106c84c44ec793167e. 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/QZ5FN2554943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b7a3e8b19309bf2c3e4516e90d4d0e54276d6ff5029be85e3d3391779526f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:50Z), 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/GBRKQ2549554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f8cbb2d35daadefa0eb4f35e32b4ccbc70e9af6deeb27dd2079e9048944aac. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:09Z), 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/GBWUL2557409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32859cc1f0d44c51d4a4d918ca96b72130a0b4e2b1c4fdd8ab03f9f047312b28. 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/QZWV32598636.