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 0xba1f2355f08df561b75571df431d4591f95658b58ccdef09b78f822b0111d6b7. 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/2a0e7e00-eee6-4a21-bbd9-4840cdef7665.json and https://artists.proofprofile.net/proofs/artist/2a0e7e00-eee6-4a21-bbd9-4840cdef7665.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 0xaea10e4fb9b8c28abe9c7fc6af39a383d13b2033928d4649a478f00e1068897a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADB1700472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e2835986b68ab11613ba9fa74ef3c7654b607321d3fa9bb7e5ef7caaf458ff. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:50Z), 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/TCADB1700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e9d6817bbaba66d7544499ce62de80c8640f525d3875e80ca6e229b069b27. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:31Z), 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/GBSMU6789369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7e0c946c0288a1e31dfe713cddb0048c5be573890267da6dc9c1189542fc6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEP2046621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9680d978f0904585f71e0536ab3ea417455fee9597fd358aa2c9c16774557a. 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/TCAEP2046622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc614b57e7b3676bddae823b50c8d18f31e0a247d73c1df469356bb13240bcbbf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:16Z), 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/TCAEP2046624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6219be6c403b52ece6f84c6a3980cb34f907a2730f37c5be9795a0f5cf5e3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:37Z), 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/TCAEP2046627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333ecd4c36b587d61c0645e88cce8090f5e8358b752021a06e9c4ce6204deef. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAFC2017491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6736756f3a607995041b0b101a6011269a4f0b1bf09783740b21c4be61d8d71. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAFC2017487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64df26d46a66278024f2f4c9279e2f5b1e96b5c3cd7258adcf68f0ec309f983c. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAFR2111029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713d4cd05a7e7db83160399bcabde2a7714562ce8c6c80929955b9216fc6202f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAFC2017484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc75f078ae00a902e4bdcfac9a8c967ca105588af1ba445143f3ce6362a67d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAFR2186281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746360d83d5d194a09c78c75c8d1ad0f95eea7af5a2f753ff92a29efc3a2017a. 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/TCAET2082696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85bbeeb71091adad25f1eec9a96503b86efa7ac08f0e46de241bda49d8a6800. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZW9L2247678.