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 0xdc0c4b18d8820b377dbade37fa6427cb844e0b67d57fa9f4946f456b448df1f4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe43123-3c7a-481f-9d7b-aad54f1a5ca7.json and https://artists.proofprofile.net/proofs/artist/4fe43123-3c7a-481f-9d7b-aad54f1a5ca7.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 0x200c7805b747d1ccc94251f3ebe2bafb67399dd83ce9e976453dccde0514fce0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/AUMEV2389596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368daee19a42afc0793361b4110564ab155fdd5c72b46f245f3617aab78fcce2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:01:00Z), 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/AUMEV2389597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40df920a5d5093d860598859843693476f12f8fe358259e80660defa06af05d9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:40Z), 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/AUMEV2384125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31a4c770d008d98b383de8de5f92e229cb727815d933ee2759d9de760442f75. 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/AUMEV2384131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8a52ed2e2dcbb7ba8da896f8fb4b94b459f79c5be91854a8b3353a481baa4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUMEV2384132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4fd0b83f9ee3c647362a6f48404d844d53455033afddc78bfb30fcfa208a5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:00:39Z), 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/AUMEV2384133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdc503e6fdcf4030d36047e4f372aae76f1a8980c0cc54894c58d5bb643cbb2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AUMEV2385676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77888da4f6f7cb839b2162e5c697f83189321bc28dfee60789871fdade13410. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMEV2385357.