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 0x96edc3880f30bae66ade51c393d31996cb6b5824f778725c838d0db0ec13b3e1. 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/23117054-045e-479b-b781-8fbedc5ea735.json and https://artists.proofprofile.net/proofs/artist/23117054-045e-479b-b781-8fbedc5ea735.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 0xaf89342e24ac64796bb25d48d08de92211ad4d7f635b24544547b58229c3e272. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2064652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6075d9559183a5d272fa28f0370ffa2d4c4f7fdff22d4e00303972025b05def0. 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/QZGLS2193385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9bd50b4c952ba2112065dd094028c9e98b155fd194e93dbb5fada6c5692fb. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZGLM2127385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0386e58d9b7692b7237e8384850f0eff438bb3b5f3db452be2cd0ec81010668f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZGLM2127404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801721988c580cdd92290e3cd4d2ac3314c9b815899ed0ca2ea096640cffb24. 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/QZWFN2391017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a47611017b75a34b5713dda266237ad172db8f1cef05326d3a17cc4826dec8. 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/QZWFN2391019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2bcdfc384a6e79a83230d237c1aeaf57462a91e757710b470b03dff1c5e289. 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/QZWFN2391016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a164fe5e153a728964ffef543a3d92bfda0e4817df712275a038acd45f82314. 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/QZWFN2391010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc8e6093b0a526a658758e5043c6222f0c4eb873c0243abe0a6b4a3b1f224f. 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/QZWFN2391012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61268ab1e02cbe4f6cd9f4e0475021425f1164f9ea94929178601ac2404a04d0. 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/QZWFN2391015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65566fec11953c06bb28572e4317970dd42e541a158fa32094659287b32fefdb. 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/QZWFN2391014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b01ef3576b1cafe6872fcbb04e3cbbcd6d95eddce81401592b9739dcdc7094. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f5b223e7b3dd093e3a0c69113c737fc11fe261dcd26af5e9ceb47f387ab15. 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/QZWFN2391018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b65962d4f1d3f76534ebfdf772cec68c1f0e6b1f104eb0ea78066f0f88f37a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22877dd8a313ef3f66c44582ecf558918b45a5374bfb76845a5beec347afa65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac7ddecedc25d57b6b41829b25f56e0c3a3a91a9087c77e1a166ccfa69f3b1. 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/QZNJY2484332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9def3e7bf9f13a232ce725a77c76cf44dfd1d81c576353428cec87a4e751332. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMER2032786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8086ad2e797c18f57d3b832f434bd3ff889ac1fb2f07b7f748fee5acf2ef5a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMER2032788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b48062cb2fb178b0e682c3a5ea782c21090ffe133ff61524dc1ab5d9d972d36. 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/QZMER2032792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c735e9affd54e7ec850a99656894e0e4bf67cf6971fb971a1f5e3ee45e03fd3. 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/QZDA82208661.