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 0x879f868037bb7d08d4a97ecdd453e6c3bbef3f72f065cabc5facbc27cadf2780. 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/71bb129d-d8c6-45c3-b95d-ad6cd5361007.json and https://artists.proofprofile.net/proofs/artist/71bb129d-d8c6-45c3-b95d-ad6cd5361007.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 0x0f3d114cf86e6ff64de2b8aa2aa107d72a3c7472827dd65c80d3d05015dcd799. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRMPC1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a84135252fddd43bffcaa02add6548045ca412454376c30e32f60750ab5b6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRMPC1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c5bccc570d5cb84e4281b75370067de0eb7ea7e480d34a0ffa7d9ce679c575. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRMPC1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fc52d65008681e57f49c23ea27d837ffd70a5b08fd8010e16828c9e5fb45fc. 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/BRMPC1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32c77a406aa2db9729bcf908f55fc556751d4324b839f17105cc09b36999f47. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:35Z), 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/BRMPC1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a177cc4dc195efc0369ffb6ed9fbf19ef6044a26191b445a1f701d666bb304. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRMPC1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893c6e2c39f03f20cd0ecb78c40298c4e9d686c6707d4a059e761616ddaa416. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:43Z), 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/BRMPC1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23d8cacdcde1e6ca4bb9035f0b5b93af8b92121dbc1c20bc032e16fe324f35. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRMPC1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f98e5d10c71dee0664d29b655833f8dece0f86c1587fbba5fd8e3a11f2140c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BRMPC1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffcd7f73d99b382d0ca8cfaefe7dba8a1532d538dd7bd55ff285f0dbb8e1419. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRMPC1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3923b074f9afeaf219a73a77aa62697980ec2f4a3e7d0f162efba6980f37f88f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:44Z), 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/BRMPC1800040.