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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681dc189a29b5f0bf14255a109f61c236f85ed2ffc0e71f93738772395abd98f. 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/87a6cf1b-463e-477f-ad9b-b8a6f7da5b1a.json and https://artists.proofprofile.net/proofs/artist/87a6cf1b-463e-477f-ad9b-b8a6f7da5b1a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeeaac838f1445f04b5eb49ca5f18864df8ff28d4811f44f5daf74c41cb08a0. 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/QZNJV2030322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1a41a53f643458b0ccaa2bb4eadca675e3470eca6421f09e2e977b3b0807d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:41:46Z), 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/QZNJV2030323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf9e8551e213962da5daa8a0885877235d6d2b4eef25b373055d0d63b563085. 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/QZNJV2030324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3ffdba0854ce39fb43f322e8c6a68198479fd022d77275c222704d5e7fc831. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZNJV2030327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee743d706ddcd151e297a5859f7ae2d72dbdaa831949d10f7cfe6750cb6b1d8. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZNJX2157538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967871cbfd357e36bd5d05cab12f23b9241618519747d62630c936e1cf09de7d. 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/QZES52281636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025a36dd00c879d4813a5f2f6d7734d2c6119f7cf31ba04d1f48e43848a9dd8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2384628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79efdc90eef825e4ffab88fecb1a521c01b6e38fa95c4399d0eb6d0e7abfa19d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6XW2317019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98626774b74792c22a7851699d2c88e55f7949ceec3a14c276c10dfb5f271e15. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6TI2392232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc637553de65ef0a12f0c1992989137dc05ef1b099db99b74c65ad1c91583d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XY2321647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f21027127f4df1cd2229ac06e5527267fe385469baafa879ec14c18b99ae946. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:22Z), 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/SE6I32496676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ff7af09b6ac3e48dbef750ca78c26bfb48007689a64ad6a0ada848507b3f78. 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/SE6QE2421105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c97fa4d67227c6b2435f3339506faf5a7bdc687039b1c465913d47baedebcb8. 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/SE6HN2410905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311296016ff1712c2ade4a988ed2b51192066b8a501c105cf99e3bf675944af9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6HN2410908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fac26642abf857879f4847c348c012649ec52578b7ed8fb21127ad4122036. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:21Z), 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/SE6HN2410909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1bb4714c258a32615ff6e6ca38da9eb419f8c5e3c5f0f03e0e864a853beafe. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE5752471162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f30db17c1a276781661f795b2684e51dcb9580b14dc2efdff36106833e3db6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6HN2410912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c2d1b46ae4a3a076a7db674bf63b3e4068751d1b137cc64638125646c7b88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6QE2480204.