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 0x223dead298a01c4d38710b2cded97ea19ad4f22c29b17e6ea47ffdffeb8b6353. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ea01403-525f-4933-8ebc-e445affb5e0e.json and https://artists.proofprofile.net/proofs/artist/2ea01403-525f-4933-8ebc-e445affb5e0e.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 0x5ab4888f06f7174680cec38325a0719e73e3ed5d5c608328765babf72dc12629. 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/GXF972410025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc84ad0eeebec861476fe5496ccdb10427694b30266212ab71ad9b0be74c2166. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:52Z), 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/GXF972468116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ecf64d33b4792518fc81bfab3ca2216ec582d165c390889b50a7ad2a6f50ba. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GXF972455756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39c65efe1902f7b211ba0ab0b50c08f7d27a6e7aaa28c0dded18fc18fc3231. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/GXF972418753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd558ec1afaf53be2b410c3064d4d80192a533ef36586a99dfff37566bdf2c14d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXF972434699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0515b2f2bb268133d24281bd8ba1c05ec36bdf9a1edf3773b4dd11cc48b5ca. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GXF972467779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446ca5a3ac0613001f164c5d39835b4b1e089f4662fb98be82022fa885d64a6. 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/GXF972456504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119ba0f20f123cdef6bccc2d795bfd0a5237b9899ebe29e3186fbb1b0ec66a2e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:20Z), 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/GXF972471754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83950224f43e9e615f8c823c303d5f06c72e1024959b9ddf784889b306d6009e. 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/GXF972404683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211a01578a2b17469897c595b36b80a8053c752f09bcf9549e2bf0e64f64b78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX3HH2152148.