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 0x0fa1d57ddc7111d2ee9733e8f4724e6516402d25d469ff01a9eadeed460c974e. 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/73e7525d-87ab-401d-928c-14ade3e8c264.json and https://artists.proofprofile.net/proofs/artist/73e7525d-87ab-401d-928c-14ade3e8c264.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 0x7e54fc754517007f1f4972f4d165cf8de731b2caf34d437faa62f2f2c3b5282d. 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/ES64E2499720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a69d114c53a5475801e7e997e7bc06f898a3d0ba4fea96bb73d6e84f37a65c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES64E2499722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbdc4aa2534d3ee926e130a338f870c2a355ae3b2718e39ddc92c8bf1cc75df. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES64E2499729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc081bfaec928354f6238ddda41139d4b629d68b3f847b8c929092a1bde08d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMZ92355581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4144c99e2351627983fd80797ddd9c4ba891decf9c42436723eb2214006be849. 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/GBWUL2017240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22f86b537316884459f6589d93f8c2b9fabcd868ebf687187bb1e2ccb935dd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBWUL2017241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3677165bacd70e49ee2889eb99fc0029e37a493b273dd0219ae8a4c4d56673. 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/GBWUL2017244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e7e7eaba2b97ea5c80818dbc22effc3cdfcfb148723b8d5ad6668bda8c546. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBWUL2017237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4144c99e2351627983fd80797ddd9c4ba891decf9c42436723eb2214006be849. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBWUL2017240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22f86b537316884459f6589d93f8c2b9fabcd868ebf687187bb1e2ccb935dd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBWUL2017241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816bd775932690e4b601daa94299a28502d89fd1cd94fe58b082123190a3e5fb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBWUL2017243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3677165bacd70e49ee2889eb99fc0029e37a493b273dd0219ae8a4c4d56673. 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/GBWUL2017244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994ae7a1c29d6bb8f81ed53ad6c2479492a43d176b11d39ab182660b1ba2cf2a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES64E2499733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104a170bdf851fe0e094077e46769015453d38ac0820635727307d345e2dba5a. 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/TCADY1861078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741fc8c13a26a3f01818d4942406b5a82074da6ad8ec1cdb702627cba0033259. 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/TCAEB1985214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2ae452720a38bbd74ec3c1e86b60e06de5f4c5778b58dd13814de1b7945a8b. 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/GBWUL2053333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257b81d6872aaf0bd9608f4019ebb6b77f10911a782a77708a6b54bbfe693eb. 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/GBWUL2077982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c87dbcf77738eaaec4cfd7619c48db571f0aea7eee986290ef54dfafa34eb1. 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/QZ5FN2030008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5740e37c6e566eb676102d07619376800080d63d0f344c8f9c8a307381cead. 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/QZNJV2321549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f95bb00dc2dfe3b8c052ab142167d0861d538584c899840f67beeed81789f1b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLZJ2025944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ec3f05122804d39e5c7db124fc783ec61197e998b2bcc6e00d1a86af96bdf. 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/USLZJ2059645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c09112205e5f886aa28d64427470197a6ddd0494f4580c9fa27c8dbd38f61d. 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/QZ5FN2137384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c09112205e5f886aa28d64427470197a6ddd0494f4580c9fa27c8dbd38f61d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5FN2137384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3501f7c5efa030e476b1189a5e34f239db1c3cd14162500d3772d2feb779c2be. 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/USLZJ2143745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7cf9f2ec552cf609870d045dd52574befd3240ecaf982caf0e6e5dd4bf5b36. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBRKQ2142279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d2521b12f01b305f7c77f2eef74a96ac1cb221c2216415f0a576976e24786. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCAJO2524096.