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 0x81c871babc2b09d102fbe09aae960e6e186ad09be87a8c84e0d686a146ebc856. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1bcf32c-5dd2-421f-b097-60d6a2ab021d.json and https://artists.proofprofile.net/proofs/artist/b1bcf32c-5dd2-421f-b097-60d6a2ab021d.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 0x4b4df527cace663348c644334e448420c55c8b79666d715509d950015ef098ae. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:46Z), 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/DELJ81742017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77c2fc1a9947d1f6aa1016cc188705ccbe530d3307eeecee7e79112bec6646. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DELJ81907484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317072d4e112f48f3ba1ef67013972cdbe9e32cdfd5f206331c7ca31acc01032. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:42:45Z), 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/QZK6L2168749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3fe1c81f9a425caff6b38fda0156926aec953ca4efa0ba19d9a1014a122b86. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:39Z), 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/QZMEM2123280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b430ce788cd9e6bd3815e77126fead600d081487cfc756324c6585a1ca24eb1. 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/QZPLR2192707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b78eecb3fc544c789a7c072b9f7e2172721b40b4ddd2aaa3eb38b448cebb9f. 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/QZHN82220442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dad856b3639b2ed98412365813615a2345a3f447b46311126d26aca7ea7f75. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHNC2209945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508a0db3bcda29eeb71eceeaeac27b2bd4ade9dd364072d391326ac927e37f7. 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/QZK6J2287702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317072d4e112f48f3ba1ef67013972cdbe9e32cdfd5f206331c7ca31acc01032. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6L2168749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b430ce788cd9e6bd3815e77126fead600d081487cfc756324c6585a1ca24eb1. 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/QZPLR2192707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dad856b3639b2ed98412365813615a2345a3f447b46311126d26aca7ea7f75. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:55Z), 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/QZHNC2209945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13fd61ec5d9c713dcf317a9f3de38d19c67d96549421669a09a7f180625b1b. 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/QZES62342150.