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 0x151ef80d55903f2cd0f10fbcf1f574f5f8df859359691c69cf050bd72b2b2508. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1814670d-e964-4749-b759-370f10fa4704.json and https://artists.proofprofile.net/proofs/artist/1814670d-e964-4749-b759-370f10fa4704.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 0x387b521d9b187a2f1fc34fd76dfccb52a90cef196411c73038103e9ce8ed8c87. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR9W11927538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f79dba9606cf0ffd3d91a4d26ccba524bde9f3630c43741ccfe2c3aab214e5c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR9W11927539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09082ababa032c589a4941e125c048560c6688e5a1e8b0ed3243b3509e60cf88. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:10Z), 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/FR96X1935579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0c43226114529b9fab0fcdb99d51f7ac10d9d994ffeaabdb29da71c6b0ad4c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR9W11927540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77694b08d63b169c9e9fd79f98bac5d8aa72b52d6790679b5a2077d4771c5e6f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:49:36Z), 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/FR9W11927544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34940162a309a776df6cbb1871c2688d0f6ac0a11a0d1a45069145339f3b9b1e. 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/FR9W11927545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f09f1ebb08641be089c7d64b507870ffc2d7612400ec5365f9be54a600d1eb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR9W11927546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45d2c588a0b7030869e15e6089104cee3f92aee687c55de27a1bf385dc81eff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:59Z), 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/FR9W11927549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5701fe1ed7735e4f66a61d17112d9d2465c3a8c8495d3d31581704911bba0e. 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/FR9W11927550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05c3e48471ff2e9bf7bbc77dda0e48a8a585349533eeb0ca04e33b43fb7ed3. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR9W11927551.