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 0xebf175e7a26aab98245988e4a328f70adf158df7cd3738586d09ebbce93b5794. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0069dfd-c3d4-48a9-a7a5-c953322ba01e.json and https://artists.proofprofile.net/proofs/artist/d0069dfd-c3d4-48a9-a7a5-c953322ba01e.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 0xd179aa66f012dbc72cff77f492d218e8696bd8ffdc6b483d724115d5e74e400b. 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/BXYLD1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b8339d1e253c6ab3621177c4677de7e4ccab479ad0ecf52708ebc4f8a31e42. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BXYLD1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef16ab369cc329fbef23e453110b0a4c50891e62aa696b4d61e05945716cf444. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXYLD1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1e21a6df9721afa1e6a21dd5f70ea25ffc4ff4a04c5551fbe724f8bc982182. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXYLD1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deae50464aaf5afceac731495645e4f56953cf4cc2bca1b28fb705dd975f9fb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BXYLD1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ee00b257d375f40c1838a53baaac283dbff916c21ce889c7b8aa4e4e466a46. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:48Z), 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/BXYLD1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a88cd1016b4482cad2bee1a27dc4b3654de175e74e0f2d761e633fa491736a2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZGLS1913635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e81a1edb4b64666df7536149f4ff80880cb7915a0bc9a449ffc70e1bf00e51. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BXYLD1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbbace657608fb856870c807913c31a9eaf89de79c8cf8e3e55f3cad3154295. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BXYLD1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f971c1cd7e4a67b3e41ce266916ac122c3bdc10aaea800d1a6a300b4bc4c7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BXYLD1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff3aa94f58a33e00333740c7dc1dc664d1d5bd779cd36e8d89cb117c1192eb9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:51:54Z), 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/BXYLD1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca87b057e6b13b5bd469d54eb184076057983a5825bbc0467d9f3e002e16ae3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKPEY2300002.