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 0xccc75eeec98891609ce3b9dc13c3e52054a94ed75d5f6ea3e6af21f5d48ccb84. 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/625a9a29-472b-407c-b4d0-2d7a6b27f7cf.json and https://artists.proofprofile.net/proofs/artist/625a9a29-472b-407c-b4d0-2d7a6b27f7cf.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 0xbe6d50cb3d6051d8fab099c8f961610f30e9e19c4d1db822d72b5881497d7c92. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH6542440947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2d90b05cec2f46c81e7e732c1d29348a967534a35e5f0650d19d16a4a7b802. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:44:05Z), 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/CH6542456509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec3f6be4cedf02e0c53824a604f06dd021b2326222233c4355414fd2f681311. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH6542467901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b3554c4e8d7f4f84feb4b5141433721b471bbb52227624708c350b1be4c64. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:17Z), 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/CH6542477559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6d82b78cce19d4660ddea68f49fafa36522bb666cd94bc5ac815ba7766d75. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH6542486566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df76636b2528435808ad66ca9c36b48c50c68a9ad22d346e147b6b33dbc122c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CH6542503649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9ac6f2e4f5b768a7f75d04fea454db0292d6d0079487904e019fc3462b93ae. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CH6542516872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010a9dbb488a71581a098c58aad70e4b18fddfdc296103cda6006e3e57b29111. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542541664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d22cebc09b68d3e0406b2d1536b0ee06a33f14b5e1b76169f94453a8165a6dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ9JZ1753031.