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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 0x08825aac62daac4910f2f6d54ad8610624f4523aaacffb289ecf5cf9ddb8c404. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc69b7a9-4052-4ffc-adda-a5b04253f9f1.json and https://artists.proofprofile.net/proofs/artist/bc69b7a9-4052-4ffc-adda-a5b04253f9f1.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 0x033c88c08daa3bf5b91cf4c33c7cd6eda98c589c0bf2afc009579ddbbc9dd160. 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/QZDTV1800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b022b2f2f1d65b2f67012bdfa7e87db430f00ac5b95077a430bcd1fd71af62. 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/QZDTV1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a66839976dfa6b3771d8e3181f42e06b1d920e3da82feb089b464a17c332d3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZDTV1800122.
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 0xb61da75565d156afb7b66e846d3cdcf1f2e565a3e664b0604cb40cc668a0ba72. 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/QZDTV1800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef2d5b10aefde8375107e51069ccd640ff79f8f5607db9fc6fb50d75d14758. 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/QZDTV1800279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e28e26b52b56a40ef03367117155f9194537725a5a2ccbe52b3efbbf278181. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDTV1800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b4d491d6fb2f4d1b961e2ca1891138b4ef62bec04042e76599f751e3a1fc2. 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/QM4DW1847211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef30eb26f7a942b002406551c4da8040e6aa9a333cad8bc8f1db9cad63b8245. 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/QM4DW1847214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1be2db882f8bb463101cd79e8dd9fc714c651e5fa8aae28896a1b296cef0b9. 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/QM4DW1847216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0059c3d9e9afdbf0ed3d96cba8c1ac4cb6fd251115f637f403e550da7ec71a4d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QM4DW1847210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc199491a4203f1240bfd11073f823c3693c62aea8db2e3b9db06275f3ba7621. 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/QZK6N2296011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40864a4a96bfe51e3a00a28ebdeb6990dbc66899440d9f9128cd9ec79dc532ac. 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/QZK6N2296012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec52ddc766d3366f3e0abcb4f77b26e5c6ba42bb0558c16e914251e60bf00c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6N2296013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e4bd0b023ce7ef0c872d791a2a62f451a69f0da03d710aa2f1f737dbfec8be. 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/QZHN82381202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc810d48f337724d06d8deddc13f7fbab2269bcfaead0df104dcd12e7bfa77ca7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN82381203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2207b3455211ecc10daa5a553fbdc17e18cc6519c6422ad82e66b33dcb06e064. 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/QZHN82381206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b03f47c7faba8dedf873a2f9c57e328d67d781dffbb72d35e10b8ec9a2d4bf. 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/QZHN82381207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc939d2aec275a1e8eefb960f40e93a5925bf7a05ea4da567fff5ac5042aeecd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:24:46Z), 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/QZHN82381204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0859e5978a181367776fa54554427cb162a204896953d599a6bbadd0d78ad7d2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN82381205.