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 0xaed8c6769ba0683ac3ffa93f9503618a635a5c8be20dc1e5d38b175718f7e5ef. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90ec01e2-cb04-4d9c-8be5-0f0146f79d8f.json and https://artists.proofprofile.net/proofs/artist/90ec01e2-cb04-4d9c-8be5-0f0146f79d8f.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 0xc1646932931e61a514c8f0164d9146c9003b207cf3836115df5f719b8d1dde5e. 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/QZNWQ2176371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e48b5172d68cf2aeb268995cc504b8675785f3f60a3de7af65ded863c5044a. 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/QZNWQ2176374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca07180ea858344478c7cd34aa5b30c187d4bcf77e65479b4b5b50694adfa62b. 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/QZNWQ2176375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8a2f916d48f399ae79fb424f233735de56e57631e69441fdf106ca6f7b52aa. 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/QZNWQ2176376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3585c814dda98600a3f5806b510d1ba59dcf9fe295693b74ce0e51040278fb2. 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/QZNWQ2176377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e67dcd0a7432496ed3acc5f1109ac919882391e6d35ef926724312caeab13. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:26Z), 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/QZNWQ2176378.
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 0xf1728da20d5d9172ed3c9da55044265e0a58b586c8187f0372a35a733aac0325. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWQ2176370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35f0452e0f06730117ddded92409cd9ef2b3d43b960996a6ac5c17d51afda5. 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/QZNWQ2176372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415cfe28b26bde69a813a996c2dec929f243dfab5b0786fa2ace720cb4e90e0e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWQ2176373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f053071279fa71a35752c5dba432b8bd4fcc118b5d3cd0b4cd021295170cede. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWQ2176379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2988d043a343fdbbee87d8b7025b32cc3d70dc1fc177175375e7b5b2afd624e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWQ2176380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ab68336bb930cdc6c13df0498c596e9a0fb1335feb986213d26ece1c17d6d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNWQ2176381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e11a05296d410c4e2f28d5444630f1a3dc0d812cc0b48713a293d3e6cc717c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNWQ2176383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca87342e25edca795ee3faa6e558e3cbebcc16c5d7d737739dd3a0775f5a632. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:55Z), 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/QZNWV2167732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d8597e7294df31776fa31d2eb548c60f5a4023a7501c6cc6af4d07145b5893. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:39Z), 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/QZFZ32223547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b82b41b52a652fabe4a84de2cd765d67e105136441395559b91474ee89ec12. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6H2230283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e913d61c8ed1b6f98d8ad32b1854c3cd1410dbcc108bea385fd61d048a38c. 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/QZNWW2193934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606004bfcd5102b6fc71a5d6f27eceefac1a03c0d14fc79edf8f2f36cfc9b81c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNWW2193929.