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 0x3afbe45e35d89eff8a796cf16da306dd0cf2278f5ce8bc9e59da118b5be44565. 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/fc143bd0-c4f5-47c2-a39c-ae76b90d974c.json and https://artists.proofprofile.net/proofs/artist/fc143bd0-c4f5-47c2-a39c-ae76b90d974c.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 0x0d73e7d60a0327b40b6860eda87bfbf9698e6e2d0f595a942b49491a664b1886. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX872352829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be608d5c3a7ac66f5ea8c8740ae4f9056b505171e4c570bbda2757e3dd72d9b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52160395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49febee73cddafa39e09f114dac45cfcacc11d96c619d857053e7d0c2519f6bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52160396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc90de108ec40a3a6d3d368178d918f44c56f740ca24641b4e97915bc68476c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52160397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f702cea7e391bb660d58e0a25b7627cc8d7f544178955d99a259e5a514c29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52160398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aaf1d1678cd875594f0f0ac9d3a11f274db332d8426294695222ab29fc910f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0Q2377628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3afbbc7e38eccc59b85065238328e33d17b5e1af8723e01c8252a1f60af9474. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA082313632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73d8871e1419f59b95837a438c33b7c4a030ae8b77363c399c01df3cc4edf2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA082304436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aff4e9e784fe77ea98c541a50b5a6138a8663419707ffc833f0e2d4dbd3aea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872360717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193364d15edd8a50aafb5d31e272644e84e44f0e81f9df8de73c57b9441d2f83. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872394846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a198add6d52eb79992b61d19461ea5fc7631e950396020758ad9e92330927d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32233477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe8d90ae414126870bf56b68359115ab872a541c3e92ecbdda5008d7319bcfa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWX2189211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd1280de00ca2650777f7ff23b6de061a424e64bbbce891861cc4e4052363b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAS2160285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af86549f998e1076dda6f1088882bf2c125316bee27fef6b1d67671ce1f992a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ52176449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7686df17e1b17298d5fbee7be672133d74a5540e7a756bc9dfb767888c69806. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES47E2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aff4e9e784fe77ea98c541a50b5a6138a8663419707ffc833f0e2d4dbd3aea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872360717.