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 0xedf7e6c35c1f6ae9f2deb6ae8e47d76eaca354c7818548e57a1caae25268d62c. 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/348dc7b0-d14f-4cd1-a926-35256ea5b016.json and https://artists.proofprofile.net/proofs/artist/348dc7b0-d14f-4cd1-a926-35256ea5b016.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 0x015e4a492c78ed13867eb3df92af3ee9f6e88a643f60a3b950a6f384b568501c. 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/CA5KR2270432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7944014a61b7bcac74c50888f07dc83006bd31805174afb7224067ceb0ea3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:30Z), 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/CA5KR2320936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f025f3db77bcc13651054bdb73726e0764dfac3c6c07903a7daf00d54dfc17b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:45:51Z), 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/CA5KR2337556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310234a4070d35f90a9ebc18aa34c702428e85d98c5a92a5fed9c588e4c30fcc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:33Z), 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/CA5KR2429615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b56c32e688616316ecec44e7c8704e605197173a92c816d72454e3837437d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:55Z), 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/CA5KR2429617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf1f3e6ede599e128d3487a9ba863e75a11ca53664a2a330d99c0884dbed732. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2515717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865807cead8b5170d9a5d233178872466148d8780e2b56cc7f10a736f9de71de. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2520396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5452049d7ac26915e0eb07e41193a4a598b654ce907db804b4f3f2b03b30f155. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2520397.