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 0x4c98bbc76290f65dfee554eb18be406e14fba17ea083be55f2bec4bcb3087a9f. 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/96aba960-acb7-493e-b7e1-5f22e0303cab.json and https://artists.proofprofile.net/proofs/artist/96aba960-acb7-493e-b7e1-5f22e0303cab.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 0x20644c63cf367f7c96b3cf991dfbcb3b097ed8f5e615da7d3dda9eb0c8704e45. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFYZ1909450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872a4d6d0b6fe3756f624643e61a995371cc378dd013538e278920bc1113a03. 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/QZFYZ1909452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a82ddcad7e04260b3853b1e98d6869ee1cd508d93ffba3fa0a10669a362bb7. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZFYZ1909453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d63ebb2e332306e12d282a2195116b74d2a614afe18c1ff88845ff2144dd217. 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/QZK6Q2056853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5201135732d8f58da973ec80cb82cf94941ec1a349f5d3952295a01b55c3d5e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZJRB2066507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32338af65a9f56941a64d8338f955242ec16e8fd8e8533ce9f33262f9c277bb3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6F2028036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d4b7b54abc5a2e2e893210bc5cb4704674b76747f4331c2c53441a0d8d4d8d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6F2028038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f3f5d763fb895dd6b475cfa72edead8da8f79cfe549b35b8a7237336db09f. 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/QZK6F2028039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32aa8416f8bfaa3b2d63047609fc0e7ec936a8c9f91b63046e61b2eefaae739. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZK6F2028041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f391962efd0fb8a06c0981d7355ac49f777ac7c84610d169ad7c704af6b415c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6F2028042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549e7605270e466ce3e17adad64587241a1f8d82cbaba1482a50695d669c54fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2028043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d4f6f35eedc17b1836b6e747bed3ef0e75c97485a410ccb755328c06840c85. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM8DG1815846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff5bae0ff66dff14aec584e56c606deea8675333752209f3077afde17b7d1fa. 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/QM8DG1815854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f454a06e29291343ad32037803c51123f7391b641c2c4c00cb4117096403a91. 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/QZES51981460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e7ca573b4969db73edfcc1e1046728757469526e438b0eaa7c0fa93485e25e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZFZ72364209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35e117a25e181f9b567d02f3c8c9a951a66007cc2510cada4bd89ec9a3a807a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72364210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee4fba143e44665547e46bd1f5ceebdbaea4869e8c6940f4e2f6b67da821e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ72364211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22fd9752d4c2fceeeb99749e91ee3787f66c2bb54bc65018588e28dd9f894e2. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZFZ72364213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93119963081b2e757f40c4115062c5941ad8b3ac7232a1fec0bce6598d6d182c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKZGC2304757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a1bcfa6a5850efd105cca0407fd6de7a944617991a97637d6904cca146723. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/UKZGC2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ec6ec2e847b6cabfee9474a91250b11378d018be4eb2662d0b0ffe186fb1f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/UKZGC2405630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d4155591fac262f855214a4751c5c04b4989a692e6bbda5921d85602400538. 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/UKZGC2507466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7332861f92d79ba2c1f52f8d321293a265e8d755408a8c7a17d57edd61d34e. 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/GBSMU6545802.