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 0x1b499dce6f60118b510005349cab4ff468604b8f6f46702732b141dbeaba15c7. 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/d4960591-6b6a-4623-853d-4fedf2623a32.json and https://artists.proofprofile.net/proofs/artist/d4960591-6b6a-4623-853d-4fedf2623a32.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 0x55a620a08de58dc194a3fb0391a68ebdde537b8f6e193e0e8ebe0b7f1562e24d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:34:37Z), 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/QZK6N2006011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f80930cf928ca9f6c14d464aa4a0219949e376ecb3f7e959c3b2db4654f601. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6N2006009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c3b6057283e5ebfcd158d5648ed59d33a736443ce043735c30791c6bc9ff72. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZNWV2025693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a8aa74e49486554adfd078ef23956fed7b870d34a7156f9cdd912e95654ba9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:08:06Z), 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/QZK6G2131615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680685d180c8836a3ed28561c552acffdb4c1371bbcab9f81e32df1f9eb7269e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:22Z), 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/QZK6G2130351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd7ef87294fffe97960aaff2f2709959ae130a9d709c421636dc04d27f1b70f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWQ2369744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196ef55ab808408d237c2f01cf179bcbdb81a96ee3e0b6b336aafb55be614d65. 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/QZTB32311716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d3b20c9d3a5e277a518a74b59db377968a98d194c96a32df96e41c6527a739. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWT2413365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8230024303c8aa5f5b1c81c344501607892bf71808e6d32ee0d4deb9b5e466. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZTBC2427020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a544b6458f5d3291419243dd206a968b614128eab32581646813ab12a89848. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYY2535593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242488efe240125758fff4d40d0ab9c797d732cc191f729b2bb3effd9c143a30. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZFYY2535594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08658b7c792a1890c6d7dc2a4184807c36082eb10f45ed38c5af668bab56188c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYY2535595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352fa9a674d45fe01b5ee33fd564f0816da285ec74bb5e4b6d010f9cb429ddd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:13Z), 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/QZFYY2535596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13af9b995cb7beb033e23db3859e1f2c6d03faedb51809db34bf39c93437253a. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZFYY2535597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1eebd57ba1226e909cb3d2433c12a24b4f4e6b7e2b0634ea91815fcb0e1c78. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:51:49Z), 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/QZNWY2502390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bbfe1c328c318ca8155dcfbd015df626f57af6f5567bf70fcec03ecfa42c18. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWY2502391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f00899e8622836342946956fcbf2480882fafe9f0b8564715469ccd9528ef. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZNWY2502392.