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 0xe9d093deda590ba6206f3f92ddc7fc20fede27866cd077c35284c205e8518c8c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60794fb9-40ee-4624-b7cf-c564a2907554.json and https://artists.proofprofile.net/proofs/artist/60794fb9-40ee-4624-b7cf-c564a2907554.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 0x958b9e9c71b70f374dc77dcee9e77604dd48498293ba9307a0a04f7bcbf64876. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/INS402004789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96787fbd6df27f8231648be790b2a269c792e224c3ac8fad3d802559e52447. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INS402004783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5309359dc6395d65b9d8c35407297f29f7dc0062e56027ff2c11c168600185. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/INS402004786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be495f8dec0420d2c8f772be3866b6644367ea29df392ffa0b55b6dcbb8e11a. 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/INS402004785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a00b651bae85aee9cadac226deda92022aa49429dc12bb4d937135259cf77ad. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/INV351300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a7480301073c4d1f50911a336ce40775d2d1dfe98f20a8e16cb540295486c3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:12Z), 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/INV351300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dce039ba1104e20cb7ea9937f2d576afc9f500f76e7bb4d0fc086f58a6e692b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INV351300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096d08258190f0189214884f5acb1e939d44fe1b40c5e798f72380372ee1276. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/INV351300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42cc9725718de4ba92d7bef7e15303cf1b2a74d6592d41e150a69c37017433. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/INV351300462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221a5e19fda03990d24b455ef58a1ca55d703cc517b67f8e3dffc404a9b7789. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/INV351300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a00b651bae85aee9cadac226deda92022aa49429dc12bb4d937135259cf77ad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:46Z), 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/INV351300456.