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 0xfb1b56c173d4f4f607a19ae1f48e8dc818af5be0a1c96838e5c4f6d9699fad94. 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/e6fde516-6cac-494c-9324-763d78e441ae.json and https://artists.proofprofile.net/proofs/artist/e6fde516-6cac-494c-9324-763d78e441ae.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 0x64daf991d13d88543429abb1bbee31055fa1c35df87d5381ae25b0f02582e58b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:28:53Z), 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/USCGH1474856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4857ca6eaab32e9cbebe8ecf116a3504f7244d528dba9b005f1c58f6d7669e0b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGH1474859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c99a4aac92fc6677a713bcfadfa40174878a580df732a782db4b20cfa35ea7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:24Z), 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/GX53U2073613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ee9346948cec68613cbbc60a7031211cece497473775b1535f03ce5273fc6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USJ3V2154844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c2244d142455bdf1268cc2d4ec52bcdd7e3288a916834ef3446089302674a5. 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/USJ3V2154845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec61ff1f441dbf8379c225738070621851c17695ee70e593c47746b82b4e6010. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:25Z), 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/USJ3V2154847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f5e8f9a7d8a66facaf47456f3a887589584c26c28867be2aca3ab379ba497. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEN2365878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fdd5fc2e01216d285f647bfeac6f6f4b83369a076648f836091b22288dcb8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEN2365879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80170d6fdd3c11ec4c73173423c4a0d32927ad9f3a784489f04e14b0723823cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEN2365883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d38312c936a60ead49c36059057e5ccd75d07df6124bfa1309629b26907249. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:16Z), 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/QZMEN2365886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274f3d1284f039272b8b41f64fc3403226b0c45a9f8b493a8d6e2bd8e41d46ab. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:25Z), 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/QZMEN2365893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5e7dc67af28bd756df718b28209fc24c7c42a0c0094b2adffa756e56f9b1e. 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/QZES82453079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ff4cd25de2810e7c6d899c00979c63ee9cd9a4dd4feb8d53ee5bbb9241c97. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:57Z), 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/QZHN72516697.