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 0x32d8c9ad0038bd4078bd1814e9060ace6c13d31a1b04d0dbe1bc705776e24a70. 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/07374b26-40f5-433f-aa8a-aafea86ed743.json and https://artists.proofprofile.net/proofs/artist/07374b26-40f5-433f-aa8a-aafea86ed743.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 0x21211aac5c4bfdfa9403e57e2db6a3a647c12410ad2c367510a2f7e9b9e7c389. 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/USHM91629023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a064fd5a31fb8162e4312420935c3f612eeb3fb4f25702ea3d217dc9c933ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM91629024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255e053806da96c82d7d9bb80b5a7165fef97b045ef8a186e2a622e34d092c7a. 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/USHM91629025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab6031824c47e171f01632d23fcb913dd0c790deb8b6c8674f129d13e9f74db. 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/USHM91629026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ad5d47447cc925b4b47d142bad840840eb5b5e9fed259190c8633937b675c. 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/USHM91629027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc6082b6588d6e7f7f24cc9a34b46c64bbedae83a3fe854a8576cb2669ff207. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:30:46Z), 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/USHM91629028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78155ad458b7056ee4cd3ef90be2302091576a092c08507827a5b6f9a38e108. 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/USHM91629029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbba90d39f32aa21510cf1e836dfc02510e178beff7812a6e898d1961897fc4. 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/USHM91629030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb096747c943a5eaefe7827c3ec6da15f9390cc2c65ee2f315a7919eda99f2. 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/USHM91629032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ffdb5047036a3f8fc0e899b1573a5db3f94b8b53ce2afec2e0ba45f2d28dcc. 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/USHM91629033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705256860895950cedde981285186c58c1c6ae5ceae0b4d88aa96a41e1ab70c. 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/USHM91629034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f9f0e1a95ecc19693f83e55c28f55c2b4bc0b2a554de2ee11fd54c0496696b. 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/USHM91629035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf0ac2c938bff23a25da33e539fa94f838ef48e72ec8a34fc23e168700565a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM91629031.
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 0x420c9336b75bf4635a1c1cd085e85513cfe2d94ad491e37cd21d94ea74063d1b. 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/QM4DW1669060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da10614b887abeea8607b2e9e1a1a03768cf994c674146eb6285d107f08d0d3. 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/QM4DW1669061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca43b7d2eaea876e3334ddd7786e712dda039389db587bbb5ec5df34a87f5c5. 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/QM4DW1669062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9458ad674934c5e8e9ff1a3c9c2a795b229e430f4a48453d952b77598d03bcd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1669063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581935e285834db9dbfaf06962050476b43b824924c2b76ef448ad4cf7cecaac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1669064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0ad408c79f88c1c4ebe84397cd453d3d1f466143c567c77d0d25ddf233d857. 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/QM4DW1669065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1627b5a5eac7828b5937617da72dfdd948a1ac3dc6bf27dfa88afff7f92c29b. 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/QM4DW1669066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666ef62a6170c85e8f3736a2f75bcc22efc863fc55c03a516ac6a9be0bbcd40. 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/QM4DW1669067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e1e75a924fdd3ae1784c1d2c54d24845f53d592aaf74814180ce84864a435. 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/QM4DW1669068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fabe975400aa241a5d918a2b14ecf5f47113e8a0b3cf7f6cd551ab57f63f72. 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/QM4DW1669069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5032c84c722299dc701fbdb2d5871782646bef29d20c3099dca91ea8d13b7619. 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/QM4DW1669070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba173e637d3116d24bc9f248225ae4c1d02fa844a80921a290bd81eac29a81c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1669071.