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 0xe5560d5fcde3436a8254b887ffbb200bbfeb4efa3ea75e25dde0e6288404780c. 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/ce3b5994-7523-4355-881d-957c97ed2899.json and https://artists.proofprofile.net/proofs/artist/ce3b5994-7523-4355-881d-957c97ed2899.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 0x01afdfd0fc1954638c7855fce0f23b1ec4fe8ba6b8ec64cc9b77d2236d82a754. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM82564707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0254c352a7a80f78ea18ea4182d615edca20f0d6c493c215c7fd69654a44b9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM92538049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc80b0c2b123e64239cd48326ed101c012854e0d7fcf4cf6e5c260739f6026a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USHM92538050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d70fec41f496f466c57be19f01d058cd4daa071bb8bb621d1c0d7bad51354. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM92538051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13153a3c55ef6f655536724e4a9575607705da42b870381cbace9541e6b769b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:27Z), 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/USHM92538053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0621b989309521e5f57c158d3e599c2ea0b1ca48bbd446fc7e2eac136a4927c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM92538054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f08d3c22c92a8ca8faf2fbb5f2c7dafa0c0beb9f5ce9fd8cc88fab89f18536b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USHM92538055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81403d82bb86a99028de37391c46bc490d8a5e6021e3a0b31de2ca7a40dfb982. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:52Z), 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/USHM92538056.