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 0x2b7566ceb25b715a51f0448aa5a104c224f8cd4c745328ef5b2909a111363428. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/006c2676-e7f5-42ae-a4f3-668974298e97.json and https://artists.proofprofile.net/proofs/artist/006c2676-e7f5-42ae-a4f3-668974298e97.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 0x86afe426bb24e50f827349c10f10200558d2d88a54efa31af22e1010ba72dc1d. 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/QZNWY2351710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18814a2868015f1f0bd11648000f3928af96cef46e6164a1e18dc1106a9ad8e2. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNWY2351705.
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 0x20b51251ff07e9203112d2203192c69bfe86666fe16a0ae8bd48425c834480c5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWY2351706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd58b33f66d8f8603440bf8b92e8ab786feeab21e6c95ac7bdb3f7db319883a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWY2351707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98be634c64543ba7422d0cbf2b53391edfd2518c788c53865de271fbcc60b0ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWY2351708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060f1034b99aed06d10df272e3007cada5efdd9907607084faf617270a38c90. 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/QZNWY2351709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e472aa65ff8609e1789b8df46a450779fa5a3e51104405ba5889a66e089332d. 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/QZNWY2351711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c378a4a2d783066032cc2981abc5c2f2bf58215832001d6e945dc9201410c53. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNWY2351712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2610b1f8351d25efc60e3c05fef863034a17eee29dc6630615e69f68a29cda90. 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/QZFYZ2201358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719175b10c75999fcc3ad12416af438af853ac4af3a7423702208cc44e1ace1. 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/QZK6K2195864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bd54a7da2ab948bb3a0f086c4468c30c69b52214cfb042cb8e3c811a8ab14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ52193370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d6e1642aa7c0ba28cd995fe94e3b5673b0442a8a748c847d3f294ed3937092. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFYX2131963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551ca9ff8d81c67b2a2e3bfb9136a9e287fec3406811ceb4d40e5786bcf7075a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2026101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b18a5a3b40417ce9d30aec96a6d521795aaff268183bd90cbd2c7df447406a. 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/QZK6P1962161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60475916df71237c2cbb64fab803c2c19a75e20903318d0c8d0b6829386ec273. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ71963834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf182f64e78caecef96ae02f231238d2fda23cc4c0f52a23caf3345c5996b9a77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMPKX1899780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb24d07f3a5316546b9670e3ee181d9fd571805a5a199cd8ab3c5c3d7632d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41865764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb1233b0fa19242f7d9e2cb9c33e5ff02a5c670247ccd3faa7fbb5a60c18a45. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZCE61824457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933d33a42b336335197d56e019d3aff65997cc30294b805ed265b32e462d8736. 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/QZBRF1830533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501fffac2833de60c4a5138b92875d27280acedb851f48c89de22afdc8e78363. 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/QZARB1816130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43176198a4fbbc594a80fd4b8f706726c39f447dc57db139d8bfda03e7542018. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAPG1898016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95778b47ae078a8c1592dc28e0b18e04169ef5679d4f703732dbc6f19b873eb8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAPG1888436.