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 0x014af8256b0fa931d757a13a14b4c932579f5165bd488873d54e8a7c78cd97ef. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68ba4c4a-d53b-412b-a424-a95469410171.json and https://artists.proofprofile.net/proofs/artist/68ba4c4a-d53b-412b-a424-a95469410171.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 0xdc082106ff81295fdace179cb6507f97795b72520f363532207e5481b5c50534. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/USA371575248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0495a85247e07dc18eaf5199f59da3287353e6585e7d6892066838a165a6d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA371575252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e6f3e584ff8eae172ea030cf230c3324c01e30c3dad0e62d3385119315b6dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371575254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4c9e0010a61638c56782cf10fc165e8319be3892a5813aa93b79f81000f00d. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/USA371378451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34abe3c5810139fb05ab4d36991ea2fe9d4f4859554979bcd7a466578a7a0e7. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/USA371072402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297cf2d7374bbf4a3c980e87b9f35857436025b04b323c6f0ee3cb1b88d0d66. 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/USA371072404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b611796d348c13aecb19b15026c082ca85ff5f69342326be0db25ce12489eb0. 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/USA371072407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7078520b28a0281e5c805b2491d0d1f94cb91017c22cbb40e97897252388ba. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USA371072413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05656d7a574e7acb03cc18425224c589ea39a5c5053d332629f4950010f11c3b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:41Z), 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/USA370980022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260d6329a7ab58cc17c25721cee19ca777c1b1049a984d13dc2ff6bdfdbe806a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:22Z), 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/USA370980026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f9be275aaa5bafab392a4d151c61f178faa0e63fe356abeae8b3a48b3dce5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA370980027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6c93d7d354981b482a0c37866bfaf0ba213478b21effcbb3b76d435041c7b. 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/USA370980033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba71d57a85ce81204ecb4e3ecc629fbca839ee98ce0a9d079b0abad9ee017a4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PTES11108001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff270f7fad3da8e8f08824f4bf0a4887de361edfbdae4f991b226f1fc78ae1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTVI19901766.