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 0xce64e8fbd198bcaaae3a0ec7297eaad14161168cb5f7c340ed7ace045a69034a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2fa2ac8-8583-4faf-95d8-b12bc75c7aba.json and https://artists.proofprofile.net/proofs/artist/d2fa2ac8-8583-4faf-95d8-b12bc75c7aba.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 0x54407dd88714d4cc35fab94ffba6e4bafeadc7aee7c13fc75157e729f3de3b70. 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/NL8RL2508861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3709b59a9724b917dc1556bcf2e01b2310641baaa83b969bd057c91a2d3d4807. 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/NL8RL2508862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf137cffed433e7d6d82d84dca10a60785e840d7d00522a78c40958d3c7f05947. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:29Z), 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/NL8RL2508863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea490a7b4107cdeccc10d3722b93e5cb35c2b1f9892b7576c600cec34619c67c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:32Z), 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/NL8RL2508864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6cc94a9817698e1d237bef064f3e9e4b03aba509c631aa3ee674a01ad8553. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:48Z), 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/NL8RL2508865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741adfe9d73c03fae32ea929727c3e88db9e72fe318aaa6dc27954895eb7a4bf. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NL8RL2508867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552867543d3c5ad57492e72a458723327120de07468babddc37f2303ac9257c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:41Z), 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/NL8RL2508869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7cd1c57dd2d47c8568567ba04380d6624281431c885aa75091a0d2c2aa1e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL8RL2508871.