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 0xabe08fa637574a5ed1c29c918aeab53b3017e91df61bdfa13cfe4535e20b5d36. 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/3c150dfc-9b06-4204-8c6c-bf1f804cbef9.json and https://artists.proofprofile.net/proofs/artist/3c150dfc-9b06-4204-8c6c-bf1f804cbef9.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 0x4c8806dbf7858444db03e1ba493404adc845444d78041d7e0aaa715472fa4565. 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/TCAFT2190420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe452e0ed3267a83a4fb8b6b128ef3f6b7ebc7d41d183f1f5b16f8a29fd45ad0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFQ2157472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6de9df1fea3fe7bd2b07d4252c0ef34b323a3a55e524377bfac61afb76407d. 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/TCAFT2190575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a2426b45687cb8d32ccd3311f8ca43bb4a3d81935959ce618f17f8eaef96d1. 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/TCADQ1855484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2e99e5b2190c1031c86ecb47e4dc8fcd3925a1e6cbe6a01f13eb662936491. 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/TCADQ1810987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9d91da048bc564d4828b9f26a8cf2fa19acde958e7dff42c610b7e168266e. 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/QZS7J2346118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979b0808e6f90baf4b37e731748a5c64f4182c8639b01d6c8ffe04e8df007e7. 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/TCJPR2234541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe452e0ed3267a83a4fb8b6b128ef3f6b7ebc7d41d183f1f5b16f8a29fd45ad0. 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/TCAFQ2157472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6199943cdcbc964983be2372afc502ca14ed626160b05c83c8d738a0a325181. 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/DEXC81900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eef10597f928f8e1d8a3ac64aeaa5e1a15febd9ad02620768eff9f08c70d779. 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/USA2P1947509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f3aa27f7fdcb8a4abd7360029a7c54af36e65345417796b0ca8c96ddba65f2. 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/USA2P1947510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7728163c0efef190ca0c437c22db78814367ed5cdfe1e71998b3c14b532fb2. 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/USA2P1946152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7728163c0efef190ca0c437c22db78814367ed5cdfe1e71998b3c14b532fb2. 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/USA2P1946152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec7885c1913de453cc5234a847423d817604a1e18c09ceb86a8760635021f53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMCZ0601168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5df2adb6e534f6781c4a7b0ad9e3a9f78eb7a218009d344df7d508cf827e35. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:45Z), 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/USA2P1906771.