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 0xb6dec45f0cb21cbda29eb9cc2f8d69d48ce22addb0dc7bb939aed1270fccddac. 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/3f8a615b-e1dd-4304-8cb7-08b23acb9a18.json and https://artists.proofprofile.net/proofs/artist/3f8a615b-e1dd-4304-8cb7-08b23acb9a18.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 0x0de44ffb17f072c4dbb98e0877409a75ad389f76e853871b6dcbcbb250bb02a3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US23A1536005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf072a0ec5f4a79e062e06d479115082e65bc8b6d7420f83a1da51e74335ce52b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US23A1536051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ef190dd4e362543b5ec5e4359adea4c0914948500c22b6b95bddf81d228d56. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/US23A1536028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73951b0635483c596ad1cfb49e0ba4301f32c6fb895d355012990d374753236. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/US23A1536180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd458a0b5b8ac96a7ae9f1bb5af2799487393f48520b9fdaee82226856b2ef5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US23A1536179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d43bf2cf54a6a285099a112df9bf87ec05e5776af5624894baaa127ee2de03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US23A1536272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9217f400d18f35ddb2ca625b4a132ce7e16a7f3991705d8d28f08be5570a645e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US23A1536265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0876b976d91fe32754709bbbd91e8eb54c030ab0b5ad9d789b7f204363a94ac. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US23A1536374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b18b7a0993367a386d4b11a6ca3e6d1082c11d93945844eeecd96ecd519c851. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US23A1536478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29a75c41f2632e6b7b2005cf67fe3f14220cd3b3a997f6ef3c5942b937b7be5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US23A1539218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e748b212add242c69414569d07c4435bbfa811ee5c4d0ba9b0f0bd4b0e75086. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US23A1540041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a4842405e7fcf3d22b5fbea203afec390d991274afa16808b459c183b59d26. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/US23A1540518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99161fa9c079d6f7a44be96e438330a11f67a70ab833ae6f685e86694801c48. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US23A1540809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc367ff7c786486965943326c27704e9e50d33cc967e67b2c706da17a1a0f324f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US23A1541119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0882e52de175ab7dfe99f57bb59babd72fb69350b2e19f9c67e1935e3f86bd0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US23A1540888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e7cdeb7ec65f2a46bb8d932690999f0cfde66b259bb0b8a1f74c52b9d97171. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US23A1542259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfd5e542f26bf3da184230a70e4e68e39c0c8d194611e2f5cb1dd095df317e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US23A1542715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa39bb5381f026a6438c6e4b9bb2820ce94c7eda086b7e0595fe9bf6e1032549. 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/US23A1543424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7d62d47403ed45f4e298fcee4e074450bd19eb6115e140ebe2e455ac930cd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US23A1545468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f34d2001e9bd2ff0cf65f52781a6029610331b61827d58142a8aef982a37f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/US23A1546095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deff8f60abfd084efa5b63d4b50f0547fc39e0ffddd971ef9feb8f1673ad3f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US23A1550573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891cfec9ba71a3b1ed66367aecf05adffcb12a3dfda012fd75bf34226a006a5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US23A1552387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf223dd4d142d3b80f8b9390a6fa8c5823cb5d0463b33f84268707bcda9ecc759. 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/US23A1555442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5995b19b4861294c0a688b8fab5b4e5241132c150dd9ab1062ab92f38aff0f2d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/US23A1556694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b08fed344ad962a4a0ea1da42187ac403e1297f3d541cfd55c2da46bbeb8f8. 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/US23A1558393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f3e8553bb81eec07c8a2ebea15b42f14ff041e96c061bfbd22fb6478e6b352. 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/US23A1560275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157dcab1a80c318517ea5e0bfbfcae7def97d52a5ca4fe5bc153294426aa0b2b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US23A1563068.