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 0x4112fa49361c632c8160b1ce0b68e8ceead64e22e4a9e3e345b06a4bd357d6b1. 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/31e1426f-eb4b-4250-be61-4c656a4f3cd4.json and https://artists.proofprofile.net/proofs/artist/31e1426f-eb4b-4250-be61-4c656a4f3cd4.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 0xa72861379690d13e77c4060ce2ed01f2d0ef77dfb1321433e52c1f2c2398d9cc. 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/CASD10900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99daa805a595d101a34720d8ff08bd7504c87e9392ef5c7f40cf0304f3b9c2b8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CASD10900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5afe8a6320c9a632849382276220810d4b2107b7077a1032203140922ce6a3. 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/CASD10900255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b7e0fc45ff7b1948f36254440ebac8244b0b3e32cdc9a48e5a723adf3b5f4. 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/CASD10900257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4ceef373d2166f84c5dbc4243053415a36f00008e035d520c789fc4a118b1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CASD10900260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99daa805a595d101a34720d8ff08bd7504c87e9392ef5c7f40cf0304f3b9c2b8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:42Z), 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/CASD10900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e8be5a8bb3040ad833be8d1557584c34c1e5c902ad5d99eb18ff2807803e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CASD10900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6f0138f8b93a2a650ebe1efe413e23a5a82d032a4f3b44b73393266c8fb5a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:24Z), 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/CASD10900267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5232f146d01d7b5fd9a2a87e4c08b2b188e5259440b509e0cfe197585102fc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:29Z), 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/CASD10900268.