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 0x5d8d381730f07ef6bd981ffa2051f804c5bf732334d4c0acfb0c767bdecfa199. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/163a43a4-9acf-4969-a4ce-e3f88b5a84dd.json and https://artists.proofprofile.net/proofs/artist/163a43a4-9acf-4969-a4ce-e3f88b5a84dd.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 0x4c1b6e33f9149ef10bbc83aa6598effca96b49fbd6853eafa4d3aa25b8937c1d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWX2075100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8f50cf2c018ad3303f517a00d55ab2df7cb66ae04347c695fc35e3969daa83. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWR2174325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2d040bac800421bdd5a5b8532bbf84382aea8ea0705b609a19c4e7875b84db. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ72222192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0dde8e9bfe9b135c5fd17ddeb72c47dc9d98b95a040c4c40fe2227331b4f60. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42284439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b7b25f5885e0b74a0cb068796f8dc59cac774b4c3b7255edc7414614826f41. 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/QZTB42284440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60f9b1d82924b7f49352ee51985d9ee15ea55052dda1982b6cf9bca88f49e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB42284442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8424b4b7154c4094cf5b6eeb3f76e60a1e7b605c95731071f74fa6ef9724c3. 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/QZTAS2384364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4848cade0eacef4741a57cbfb895e874602c77f93deab0aded586cf4de349d1. 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/QZWFP2369544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc9e2bd309cf5d56b7fe8812d3d4c29e2517d3e233f69a4f17b17de9e06fb6. 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/QZK6H2453754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8fdf2fbf5187427a4bdaa53eb77ec65186f68ef5fdffca06eda4a893ec7b13. 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/QZTBD2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad68a49919b7b9fc2cbe37cc01b775c1efb6cf1b4eff4280c0ae413d4c5c1d. 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/QZTBD2419385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9127cd438b6096ab1f440934eaf91d53ea30d4fbde58e28908de8c3e89726322. 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/QZTBD2419386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a34ddea6126f53d786cfbc5fed091fba4c85d294283ed6c56da8499a84fae1. 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/QZTBD2419387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a679ff77534fadd64db00a9db888f543d47941a799e3cc00569108cee7d6f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBD2419388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a68bfcd30d45147fe1f41930e4b5c61e4c8c6d878656534dfa4bf045d55945. 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/QZTBD2419389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5e77df6a8fcb1f3d8fae55e55cc53343e0e2e0c2c24141521b5f237dd2bbc5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZTBD2419390.
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 0xe6d8df3e22fe4d7e790657e5aa7549026a10b8bb746b008d3a96012a93b6314f. 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/QZZ7S2465306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ec0006b69337ab32f56b1ca809a98648f415d2744e09fb731615d2dc8033ea. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F72529757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4276d138f5f69bd45f1b5e8117bbd067a3afaf7045ef9a98a3b653c9d4c5984. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3FA2575018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f7c432cb5c29a7aeedb3df7a50b3d44f33ef9f01b07350334ef561b3c83bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2250418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194692a321fa5ea7402648e3b522b6a973536107caf26e0a00ddfdb09ec78fe. 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/QMDA72416912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194692a321fa5ea7402648e3b522b6a973536107caf26e0a00ddfdb09ec78fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72416912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded92c318adc87826829a7edc9504f40d72336f301a615afff6909bb57b8821. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2594798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6015169ccda8d616528c400e7ce8ebdf235dce8f4652a24eb902f3180948e8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNB2489467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b92584b5c0b3cd8da43667318c6ce41bb536d53d3710912e9122a5626cfdd9. 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/QZK6N2430310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169e07707a4f9340269bd27a129fc2a90848e64d45c2391f48b8fa58184c49c5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWU2458939.