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 0x09cc12b1574e66d3f71f06d50bb6fe194a98bcafc319d7ca9742229518efb8d8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e41e6537-efb5-430e-a03e-4a855bc5b888.json and https://artists.proofprofile.net/proofs/artist/e41e6537-efb5-430e-a03e-4a855bc5b888.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 0xa41c976b8e67b2fcbafcd90672fdc94745758eb9a5cc7fed960f45521180511c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USYBL2202097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6566563267c89f4ae0c790511220010853dfc6616addeee3b36335a047268af. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USYBL2202096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78404cac14252397063b71d49025813fa9e1afdc84302892f683fa3560b583e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:18Z), 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/GX5MX2244632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771dbad247d6071f456c975824e9a74b082a605ea22ac866c2cf2b67e4233dee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM20930265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb034086c9ae724b6a3eca8bdfad53f221222484d6f9bb2a3d431c8f8143f46f5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:42Z), 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/USHM20930266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07854a1f1451c8e22dc7c20170e58100b341ca52b2f2c9529b8ea9e799cd09c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM20930267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac3ca8abe2a2606cbceffe99e7e7fea828e24b100aac1741281cc0c103a2a5. 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/USHM20930268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7766002979343bc1251e98b18d175f398bf99f86a32336bfbc8f04e21d65d7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:01Z), 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/USHM20930269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef1b6bb2738f4c4870a4fde4da8b56d90329bf5bbb24ef81b644c2124e289d2. 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/USHM20930272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51334010bcbcad7ddef272b40945a23898868b9cb871493a471548803767cbcc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:27Z), 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/USHM20930275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c6d78e609f0f27b1f1681c82402cb85fbb25bfd577fe6534a72071ffb250f4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:00:44Z), 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/USHM20930276.