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 0x490478a387b57bfa09623876c846a703785e90b83684c1c503f333ba1d50d9fe. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f528db28-80ce-4bab-ae52-5d33842ec91e.json and https://artists.proofprofile.net/proofs/artist/f528db28-80ce-4bab-ae52-5d33842ec91e.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 0x61b854dab46381b7236618b7c0934ea397ff00823b13277a6cefe53fe6a43ae9. 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/QM4TX2426712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947deaa1fe101a80fd07d3e3c3a8aab2636bd03a64417be06df7e117b3f515f. 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/QM4TX2426713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1dff58c69138000713d5b5910a9e1d9589cdbff5f7c0ceeb5943e3b68f74f. 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/QM4TX2426714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f9bd1c2c064f3d270f6a2235fd79ba477840b422c8a0c322e16a3989b8d667. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TX2426715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd136f9b2b99aa325745ae288e058d1a389856df1a583b20bc7544c41f4e640e8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM4TX2426716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5558cb2e20a74220100e727ef4257a55b1ca6536ad1004c6818af72c3b29fc9f. 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/QM4TX2426717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd05d8345a7a782f6610287573060b8cdfcecbdf66f1c7c62b32af81c4b80afb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TX2426718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd114dd293e69318d0d9a6784fbb8c1c16d392c426a09015ece1cb21050c5f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM4TX2426719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2e42a5be9f05ac773144cbd128b7d7d4f15d4a222008aa6f194e4a7160b68e. 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/QM4TX2426720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3095be7a61fd8a06cc2067359f7eaa87d7ebd4e16bb2668330ea8cf6117a0c43. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TX2426721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e16bc594dad8296e533c0d63ee5c21865cb8675ff4713d9c07aab718b264af. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TX2426722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3fe4342dd00d511e1b9db73ee3aabc91a12ce24b7eaaaacfe8f905273bf93. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2426723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beff5662cbde8cc30c2d3801de293d7a4478ac10fb17e8bfe2b9aef12ecab1d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX2426724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e7cacc3d4f738f0d89dfe5fab9dcdef1a6e6d54f265e08f962361b37831d7. 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/QM4TX2426725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b3c20827b8896ea37def43788b36910a198403bd1a3d9353f0c6c8bcc808a4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE5752397858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324fb2d6ab94a6d4f674f67750131884aa151c53522b9d30eae478893a8ecbe. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM4TX2426728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7921480d54c7cdc5d1f54fd13fac983a70763de1076ca73ad3d25dbc9f12148. 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/QM4TX2426731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f381bb351cacb87d83104fd7650b625af60043b0ecdc72e245d7605d3e20e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2426734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895427b15eb1cfee55b057e2a7e774a843c59fa9b628a0cf35fe9aa1612b6488. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM4TX2426735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7736e7d92746da178eab7b1710132c59d647011ca318433f18ce4553d41d9a5f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5752397859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8800c3abe41ba4b243ec01a3de2c1629e05a24f3737842cebeb6105befd3ad4f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/AEA0Q1923249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e28b98363e15886da790c583de3cb0d387f900270673f52751c1764e4016b0. 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/GBSMU6296207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31080988da7250e28b52d1e06e2976b08bb7a28c3f088d516b3ca0973ffd21bd. 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/CLKT22002588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d24316d78a59db3187a2e472b14a90ebd51816d034b5591e748d66257630be. 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/CLKT22002927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6e8c9917c877962ef4434e4ba105d2a15ca0523b8fe6edefcd7ce8457242bc. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CLKT22002926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f988176123d3f8228ccb9469aaa41c452236d31336c529dcc32d25e1a27a9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CLKT22002925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d45cccd0c4f07e425390e7f94cbdf8baab3e4ae427904630c4317167ef84eff. 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/CLKT22002400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989c57ac0e37d3153f9340c1b90d8fe78072cdfd6d5313e2da7d5ef7bd170e3e. 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/CLKT22002924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ed25dd7c4f2eeb7e321a4f5f45a956529c1acf85c0bf7d5d299165291c6559. 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/CLKT22002923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb60d51a3adc116e68dad4cc89e3bf1f07e4c80140db7efe5a5be72673eeed7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CLKT22002922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa69751be2f59a798cb42df457bb005de7c9e58ec2b7c187e8ad2c4a38d3082. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/CLKT22002921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92820b4f552d0f3a8db4574165bb16af62f3b3e69a7106373c2d469362da61be. 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/ES71G2224898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9369a5a5c93b23f33e29992723a7826b69bc02c63864fa85d3d07565af5407b2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CLKT22104066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c674e41ee00adab6891b4bb351248302d054440f507c5df08342acf2db541. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CLKT21902026.