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 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 0xae7a67a56dbc800a69e2d6581d5b23dd5b3017bd512b134a44aa6db76be0b355. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46d8dbfe-77ed-4e3a-bf55-a93224332847.json and https://artists.proofprofile.net/proofs/artist/46d8dbfe-77ed-4e3a-bf55-a93224332847.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 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 0xb370edecbde5a934f3fbdef07fa0155c59f70d113da381d92537b0c67dd585e4. 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/NZFA02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9933284dfe2d7656d27af2a6520265a2794c4b082c03c1578a693ab073e0e7b7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NZFA02200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272c0ffa1ed08c4394b345f9b4e479c0071511480b3c390d65038b11c64148c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NZRI12303744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b1726101af82ffb6bc90d98e2a80547af781127ffd5fb30c81cb506aad2408. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NZFA02400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe670c3c54e8fba419ef07e538f78f4373982f535265433d25c2e67d701e4cc27. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NZFA02400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9839e67042093303a935c29f3777894443a6a6be28ccdf46605cf9150434c6. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NZFA02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d3e1d8a18c8f15acd30e4a9dd692c7ac0e46685a44da5f40a9d249006cfc9d. 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/NZFA02400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30219971229bf639ffa5302e81c5944060cdb7ab33080f592dc3be9672a36bad. 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/NZFA02200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d71a9e97df96b9aeeb9b9cf78b789f824ee33b40798b1defb7cb0e8d379cdc4. 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/NZFA02300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36191d465f9bd95ac8aaf87425d419388d859731b7eb36f86c08a753a861dbf3. 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/NZFA02200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b0635fe367a57b18daa42eb267ead0dca45bca489af1afe008d67c215669d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NZFA02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9170b787326a0cdf3b33cf0aedf5dd4fefa6d706554fb0958b519c9bbf1600. 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/NZFA02100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c0dd4e5e2f645135495e048f8f3c77a6f14f1443e5336bfb86b6a16ae18986. 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/NZFA02000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3607b8e581cdf2d64d5ee0d9d3bcab24e5d2f96f93b14ac1911837fd0713f765. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NZFA02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccfbbf3ab701c4631b2e6b19100db5f6c21edc11836952e939153410ee67f02. 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/NZFA02000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48d7d21b30b7903d35afb81664cc6f1918e57eb9a7f7487ad9779747ba712f. 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/NZFA02000001.