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 0xf234758243594aee3a56bdf2be21eede6506a63c6af1da93f9a6936cee598396. 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/aea74a9c-c8fe-4ee5-b9af-98714f212da0.json and https://artists.proofprofile.net/proofs/artist/aea74a9c-c8fe-4ee5-b9af-98714f212da0.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 0x07f27c41257c0fa90d19e3449f9b953b9118e885fb18bd921d9276d41f9f7648. 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/TCAFO2156133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a09dee47311d447b2e54a03557003c20b921c4ec78d07d0e9dd963155b624d. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAFU2112157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40592b7bbd8442a31505a5cb5bb096936a406a38a3165aef819e0c85e7f5db. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/TCAGE2230376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c25e1ab635f88b8fa2cdc59a9833e73cd721ab2b231cd06af0458cb5cf85f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAID2460622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cfaee0da771c46779d798c9a48619eb224b81ce426ee3f0d45c2dd8736521f. 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/TCAIE2460636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67531db0919a21884344aee751c982b5baff6c4cf0f4c697c9ec9980ae936250. 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/TCAIE2453776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81a99b2a80b41c5a25c2fa7342b16a2cab8158307d4c5e6d8fa51f383dc811. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWW2484767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc50bd1530b3f43f5988ae6eca4fbba88c1a22b0a2a64ee745da6c7c2e7dc76d. 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/TCAJB2426423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9919812026744b8f0ea23624b70373e7a2e866efeaf6f548e28c87cdf4df1ea9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:07:53Z), 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/NOX8G2500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7960632e9a2ceaa742259766a65182786f764f1c230cf55f0df55be4006e42. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/NOX8G2500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc082913e15f9e4ea68ff6acf5c1902a6fc78a9ecd0c4162611525cae49bfac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2467163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4daaa758aa3c2b41610bd210dfdf35dc9ff49ec82b814efc3ea12558623b20. 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/TCAID2471438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63128a7035ea58a40286fb4df4fcd1ba56db92007a45726e08203eb25127615b. 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/QZHN82302012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a186d6de1a3fbd5b16f12924fa1538b6d8df31d7bf2f1d7caf7f0a4c2a2b1. 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/USA2P2460328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd87f16dacfd638358e6f372ac454599a98e011deb4244731d27815365ebb8. 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/QZHNC2400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6336811ce963c36d7e9895b75e8034dec743c8bac63dc2086b6d0a49c1d28e. 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/USA2P2473754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1cf0ed9d937073cf76af4ca4c51d8603f2c8132eafb6b2c9e7d0b5f4ae0c61. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P2419969.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec98a47f84e24ce8ba7596c29d04a4f033ae5e2e753093b305fa25a470750e2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZWFH2388553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727bcfd6f70a63239ddc27e65653cc0b81becd4fd1a396fdd7c07c93261b624. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZWFH2388554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61a86ac67f34350db9c5b60b88da93d1dd1ab330f2bf67a4588cc46ba4f788. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZWFH2388555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcb4a98712a7b6be0146e22202fa66f38409cb1abfedf929cc927a2eb910f48. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFH2388556.