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 0x7e54c2b3aa1a249b43cfd2c470817b928d3746e29e66aeb01b3c5428dcc5afcc. 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/09f9df6b-17ec-4958-afd4-c83cdf1ec999.json and https://artists.proofprofile.net/proofs/artist/09f9df6b-17ec-4958-afd4-c83cdf1ec999.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 0x25f5e6f72b32a0a146e252459e17e8967ce66e8c2a4fae1514574ecf1092835c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/RUA1D1912750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa6b2465aba9784e4f91c8c7f4a74fdcaf2fa11432887eff979570379a5e1cc. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/RUA1D1912748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93159cf855a6cb3b2f810b2c96414815996a2e03608b135c3da009a03151dfa. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/RUA1D1912753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a87ea80a618b4fc586e635e30627db81b917d670a97c99f0ddcb97dcd33b47. 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/RUA1D1912742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cbceabb11833383e9ce45f61d01b17d628829bf39ded5d233ce77beefb44f0. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/RUA1D1912749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a519960a399e16d50d31628e77b90ce28e81e6bc7e11b270c6cd9c1d1f788c. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/RUA1D1912743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9340e5cc6cffd77341e40c8ca6adfe595d667e75f2c0d434eaa138fef56da51. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA1D1912757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c8b0a9538bada9302d071e6d37a695d98aa9a77599b9baf8190eb51a2bbed6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/RUA1D1912745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bee5a5665d26d72c9c26895673956b445644fb388de548e387978ded657da4. 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/RUA1D1912741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f41edf4b5d963d111d7042b622c7786d5fa9430ee5f9bee1babccac1fc4a25. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUA1D1912747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c63a4299a3c46886de1210b70c29d2041d6d278b7ba542aae16a2a4a50c04. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/RUA1D1912492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be608f9c933c7ed7eab5c666b96d16163dc529cfc7ca2ba1991a5fdb819eb5c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RUA1D1912493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cae3180dc7c0958a14cbc89f5c1a7a7d02c919f5688546517c852c57c71c0b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/RUA1D1912488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657b98b37078d25f9bc414569620d824f11aa562d3ce8c6377a4ded52965d1c. 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/RUA1D1912487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0ba3bdd4ba1e993b2250a0f18a24825a662a654c3e162d5628b15d71977523. 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/RUA1D1912503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe298bdc1c30bb247f62f99ba18d5d4e38d05e91b6e55285f1b011ba8177ad5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D1912490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad2b64bf1c56cd54d9d36c3e68544eefdd98a23af63ed2f2de00271960ec8f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/RUA1D1912469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0251fa068f0d67947a36fc5116d8459a4722c78c05e592d4078e99797184af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA1D1912476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9ac26292a7fc95f25105ce82feceaa97da9161e4c2553b741c2f5329bfa4c. 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/RUA1D1912484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd777bbf422197c4bd804f39fa4bf8099d1d2b8005acafcf60b4d4267bcb857. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUA1D1912475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973bd9b53c3752cbddbf2de4514128e918a3e4e77c5574203b13b210e5b34b83. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA0R2463719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad02cae5d040b529570726f57191efa4d03e45565cbe734f3d932d38136495f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRS182168569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f304912f923244498f67684f912ac2d2633f82c7ac0429b9c7428621ed21e60. 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/FRS182168570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc5f5cec5378b6d42955a5bfe000f1f0df0e1f0bca7735e79b5c223b2a29af. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRS182168582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e48c8e69d537d0ef4732d51ec9284a0c9b51595074443a9182679f4e07581d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRS182168585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dec362b449cfaab20da412356873e94b8e0c0ac25e816c12510b547bc6108c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRS182168587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4de24e11ec8a7dd1401f68ca5e83d83c693b121b188ba353ec17b23200c0c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRS182168593.