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 0x4b0742948c73252769bf4c2e9257ed0cd01383380cf8eccab7c9f3ab39e2e2ef. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa73a51-7686-4056-b533-6ed684aba0ba.json and https://artists.proofprofile.net/proofs/artist/eaa73a51-7686-4056-b533-6ed684aba0ba.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 0x2a9cfcabbd67fa60fede42711a0793eb565edfd7ab0b29a34ef394ced0b8aae3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2507475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50598c97f1c6ecaf49b8f50a9405364b96268a812a966c5f9d2664be20301315. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6Q2507476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b9550b6f13095292c1287bf61758a921bc9e40998f4abd3b877d31359ace3d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:41:35Z), 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/QZK6Q2507477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcb4773c57c41cfef9a32e754e6c864897ca723466ca57e3a7dbf0a6d233621. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6Q2507478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51d640c8251744ecbea7009ffdb98c3d57c95c216ea6d6fc2a7df31a97031d. 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/QZK6Q2507479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ad1c66627a5f7349fd510fe99d7e403680948429a404b18c871c7c4b96205. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:08Z), 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/QZK6Q2507480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c72975f03a54e98c6f3559e16224f6ce78adb297fe14c5676b0a32a7a6786. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6Q2507482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e1af77aec26288185fa166898c921227f59c586032ff43a4fc349856342798. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2507483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553d43064d90544b1d899a193dd32f4858ca03de9e3748c6dab117a81b7629f8. 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/QZK6Q2507484.