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 0x1c98e644ca75896f642e24b2cb3923f905fafcb10790e7666a45ffc6a715d0b5. 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/5bc3c208-ed17-4e4b-8b56-563289274112.json and https://artists.proofprofile.net/proofs/artist/5bc3c208-ed17-4e4b-8b56-563289274112.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 0x606c7948081106b380a9ad4d0442aa6460d48c0b7fc9abc13fccab56d882d7fc. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:07Z), 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/NL4NL2104055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603eb086fcb4fd2abfd38cc12191aca99dd40ca737f41972869d4d3f302261c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL4NL2104057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf8c3940999de7c6b679dce9b52f76aa3e62507ad9468e3512558da47a4d63. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL4NL2104058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a2b98799fb7da5c3b5f134f2e157f7d7dae742d4a53b3bf9353766eddd29d. 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/NL4NL2104059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e33e44c83a56c748ef332462ecf93a6304b5002ebae76b03f3c6dd01e16b8f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NL4NL2104061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe700c05e2e2fa8c7c92facedf5067ba3fa5383f92a36e245d995da647cb829a5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:51Z), 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/NL4NL2104062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d692ea707515bb7287c64c1b2f4df513089f78f59d682d15257ecafc1757b1a. 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/NL4NL2104063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823c6e6873459e90ec5b74328077ff2f621cac5e61fa79dff41ed8750975832. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL4NL2104064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb8d59cd5a3e1f853c68adb0a60e6ecf402e4697c456c7a1f8bd3708db76f12. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL4NL2104066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14019b8233b8bdbc6998fb35156b661b9d9ec01e91a90617f57ab01e18ad668e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL4NL2104068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c043282e1faf29ec2d233235c2a0fc40dffd3d58aa9d762087f1298839598. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NL4NL2121053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d80a0fc015b9cac53529d26b59d46d1b3f817319cc5efeaa64cb96c11eef8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWV2218076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af48625f26beeddf12bae9927b2cdc4b228f140ccea1d03ac3c698c8c37feb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:11Z), 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/QZNWQ2390342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefce50dcf533af9d74a7418a3d7f2f162224ee2d7a2b2c3b8ff74aa3d68d26c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAY2301446.