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 0xd25c8451575ae056144d66910f8097f0ee542261ca32ea755c5e14c11498dc29. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/642c229b-fc28-43f7-a08d-0c722c3a291f.json and https://artists.proofprofile.net/proofs/artist/642c229b-fc28-43f7-a08d-0c722c3a291f.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 0x96d6891f720dd229cc58624ca256a562ff5a9471a92ef20bfdd9a576d71558d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAGOO2536621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e355add8d349aacf32b2bc64bda80690c82195fac661866b291366b41225ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAGOO2542668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d40f5de633af02eab2abf4fe81bc4bed0cb166054829d1d7587782af1346a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CAGOO2556477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a53bac2e5e98a14909dec6690c9ff06d6df1105eb895479850b3465e4585b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAGOO2579266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dfa7b93296d814be8884d071e9ac8399f25a24637531813f8753fdf92f99b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CALVP2505150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e67e460d21decb1cdc76da15be1acc698fe571cea425cd05fd343aa5d3a608. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CALVP2505151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68666a3e1162aab3f92c00fece892d0cad197cbedb7f1adb9735075475964e8c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:06Z), 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/CALVP2505152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf26b26030be3269fd9ef5b083fda0e769c9f10b01ed7e670cb092e05cfa8533. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:01Z), 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/CALVP2505775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b4914daaed6af06e0b77fbb0ee773b70e1362686e054e271f29c978a59cf8f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CALVP2543880.