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 0x7925610730e63a9ad7800e57c2748924fc8f8ae22c738c97b8c0a3bd06747cf2. 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/93162366-d1a3-474b-9656-1273fe80bdb1.json and https://artists.proofprofile.net/proofs/artist/93162366-d1a3-474b-9656-1273fe80bdb1.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 0x177f7c6ce5948868d13e1fb648ac2309b19cf627e2c45b4e4b0899174db03549. 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/TCAGX2375393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb96029a89c55465e5f546e3d874adb544a9fe5af460494c58768114c3dac1b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGY2381808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de5a3b7e1ddeb107768f1ab700bf17cbfa9c335aaa9e1ac180b02bc81a250ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHQ2324068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700e98322e9cd87cfae860fe063c4bdb7a89e6810972a83f9e100b8b8ea6110f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAIJ2456614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb973e7f5f2d0db2f89424545bb059bf465895bb5a1c32339d638b9db38aa5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIJ2456621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fd8b04a23e17b1d88666f7d4c1e360dfa80355d95d54c64689b07111691fdc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIZ2424747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e01e9585367f4a5b22428972e486ecb4965e5bb41621110006507fca013b9. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:35Z), 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/TCAHT2492222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52dc8816f16d4fc733e0d4187e6578d434c9bff7c8f6a60894974b89a4f7a27. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCAIG2499636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa679fe21ec29359458ccac42784d5325755efdeaa442ff8a99d49cb73f2273a4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHW2466458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75004f30cd2120dff9b3922e18e1ebc6c349def2709c16cbe9aecc3251a28e6c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:42Z), 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/TCAIZ2424921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700e98322e9cd87cfae860fe063c4bdb7a89e6810972a83f9e100b8b8ea6110f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIJ2456614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882b7c2c065953dcad0e6dcbf0eb417b5da8375eaf2cb782e6d68a7836a223d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJQ2597218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64df696a8211da69db9f46f2e5cf6445b3b9ff0fe6731ed00010178dd769eba6. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZWFS2588789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf684d9ace193efb3b300aa9daede9397eba7b4a362a642a528760da48019fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6622518882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9af8f26093ef78b41a9bf8c8c021a86d49078d55b9521a13b3dc8fa076cb23. 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/TCAIC2425035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b68abf4997db527d01121042c191bf375234536151396bbaa6ffcd646d93c. 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/TCAHY2459760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2aaaf5c9a371dcc047acb6f3851cdcc1c786f627c977dc767e5bfa7fdd812. 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/TCAHT2441990.