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 0xccc18eb60b3506f72ad273288eb4cb325966adf444213051aad9b31f4506a5a8. 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/48f37f51-da24-4baf-a8e2-69ca2cee4988.json and https://artists.proofprofile.net/proofs/artist/48f37f51-da24-4baf-a8e2-69ca2cee4988.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 0x1ed7fdd198231be3f36339748c4b6d157e68257c3a7a7bb6c7595e614d4af387. 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/IL5842030411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddb1e5b89852cc7545c40f4bbcdf8a8e80571cf686b9284b9f7359baed42411. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IL5842030413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c52e51e9779937674a5d992400d89ff4f39a354674c92bbd3c603c36b5b366. 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/IL5842030414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10a0352cc572229066a4ebc230345908a8fd07699f223d7a7872c42435ef3b7. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IL5842030418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6178e2d6302fed28700463a638330ffc52c5d4e5372a6d287a46affc826b92d. 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/IL5842030420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f29f8a2aba109bb9f70da924170b9b60bfb5c7a07bcb37b0dc8eb0804eaff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL5842030423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd6d49f008ace9c3f5adafacb2471f56b9a8c1f4e695fdbfcfe4e94fa81597a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL5842030427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc2bc1c78f1bfb9b1cc6d0f65947ff3f3c849fe7657a707dda4fe0f67460c8. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/IL5842030428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e85b995253800282533de7c3aa3d3a066d47f25cd1f7637727fee03cca71393. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/IL5842030429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974e35b3655c2656dc2970774ace3a60f8c03f046401fb0fc03d6ec6c5256ae. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/IL5842030431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef92dd09dff8e2e71386afe5d5017ca755677b7bafd812c14fd00402e395b87. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL5842030432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0564e50af45e77ee8747452780cab7a4385fdaefa96c052e034d2e4f572e0ac. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/IL5842030433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc153c743d3e6940e779e91b8b2c6ddbcad3a42241ff22abde9cd6f95f3e16d77. 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/IL5842030434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e0b377b1112b6831bcba69a061ecca72bd091d597820fa1658a37f0673187. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IL5842235273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d367e9ddc611609777294e2e27aa79bd2acb172d9e091ab437bdb8212fc988. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/IL5842449415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff9272c7df369a36e1fbc35142567e209f5de8040fa176c9bae01162dab9f8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IL5842449416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54bb8414d990455626d24c696fb6e32c517bf56b83b6e4099de4f16fa6d322. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IL5842449417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddb1e5b89852cc7545c40f4bbcdf8a8e80571cf686b9284b9f7359baed42411. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/IL5842030413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817d58c74ed31dc43207fe8f88fa590fabac00387dde93354e7fe9926863076. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/IL5842133880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e0b377b1112b6831bcba69a061ecca72bd091d597820fa1658a37f0673187. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IL5842235273.