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 0xa61e8aa1e3598fbd9015a597c019612c6fac2655c84a5d212c347fef4807e273. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34b53c1e-247b-417e-b280-ef5b55b7c9b3.json and https://artists.proofprofile.net/proofs/artist/34b53c1e-247b-417e-b280-ef5b55b7c9b3.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 0xaf6c1548b55f9b74947e6c52a1639272d6814717bef91458d4cc85cb11139d14. 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/QZFYZ2304552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e9e9f9ee9170a65c7c32f7d6b2eed75f2a41655862e1e28f98dfbe020a0c2. 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/QZNWS2397630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09182531583aac0153b8da33aa48efbf6c9143f5bf9ef2dbe1a7f0159215a76. 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/QZNWS2397631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dfb32bb56c4be75651c8cc36ba8e6493d8d07a7c62aa767258d8e98c4d11cb. 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/QZNWS2397632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50072f5f162617f42c9c6f45ab64c3533334970175220b41550fab8cf152bbdb. 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/QZNWS2397633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d75e1b87a41b4a0a034f6d960403aa9b07229f212ad46969ef2f18c359c8c. 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/QZNWS2397635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7c059994899fb50435e0ceb0fb105b15b016bed3fd7537a444318eaf6a1306. 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/QZNWS2397636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a39eb6530707f718b030c212dbb2acb77c10200217e2e7ac080f88054799aa. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWS2397634.
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 0x7f1659580e5cedf7723766de457cf7db6bcb9062b86f849163fafe5e968dbe0c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWS2397629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad460fbd4422eccac3cd1e6e4c454ded3f88e8ad1c4df0e460fb86b0d564b35. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZNWS2397637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d1663c857e816c541a09f4ee66f046a4579f0eb9b49760bf50ade9fe63802. 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/QZNWS2397639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11035de520bb9a7d9ca95c4ef22ae4e777ea313f445a7dedd06e7b2f0005b17. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWS2397640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe880c9add29263cb60469f8060449f8ae647a66e30fbf318dc946177222c8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWS2397641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9acf135e79d12733bbff5f272653f6a51d15d10a0668d2bb6eb836f06c184a. 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/QZDA62314560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30028c97db468f1693a2da04d967684bcfacfac37ea3dba0462bf2402aa92b94. 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/QZDA72360279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349ab28cb49c8917eda123935d1523e643979dad999047ef989c97e78ca57b6. 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/QZFZ62360833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac668c027c296112a80773adca10a270c78983cf35f94474d0a900fd133f353. 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/QZTB32237995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8b1931f882799b62eb07fe65672940ced8af2d8366730b9919d0a7ad2f966. 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/QZMEP2232415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf875bf1f754336d0201173dc14e730b6ce0c100ff9e42d30bf9d59e8b1d05b5. 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/QZRP52142460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9746fc9cff8fd6b0ab17f3d0855753126521b4426577e19e4d4b73261afb015a. 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/QZRP52142461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760f8685366d51d8f444d91bb1df1c3638891e25606df49ef6b4b6b38bcf39b2. 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/QZFZ42274229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eea56ed60e0ee971f51c129364051893803b97c9f3945704d28130cf7a35de. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42274230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170cfc93bba240bbfc352b97a5888696ecb2ad12644731f99567fa851a7d0a95. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ42274231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc845b3d30f4318f2732e4b00738dae78986a87b67ebf2e4d0540931f08770f8d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZRP52142465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f875c82163ed518ef88cdf4ba38778c74b63ca5188d623eb552ff4302265a0. 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/GX53U2063224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2046bb7946db426e5874f1ce912422ea25952b987b6ef0dd614e454a86a74a. 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/QZHN92160397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a7770e60de31bb64483f1a52147d765b6b2c5008a1976c3ac2e6fb2cd66a58. 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/QZFZ32122358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd0b64fdd83e17f70bc460397f2a0aa4adfaf54f6852983189c87b9f4cffeb0. 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/QZHNB1966067.