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 0xb63ed726a757447a301acc618a0cef5096270f5b4875bb84628e1ca2de682aef. 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/1aa451f2-6f50-4fac-b32f-b8bde94a0ee8.json and https://artists.proofprofile.net/proofs/artist/1aa451f2-6f50-4fac-b32f-b8bde94a0ee8.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 0x36575ec4d9222f55ad818eafe49d480f37523a8c63bc8f39d4df89d23f0ab29a. 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/CA5KR2395055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7bdd0a2ca1faf045438908f969c60d2025517a5dabaed18e69cb2830cd168b. 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/USA2P2346344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d838dc02e236121f89f1ef2d0671c66472119d0274aa0a2f868e96b613d40. 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/CA5KR2371653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94bb054b6c3af35ec7a0635871b119908f3aca2b977e0131cc48e31f5560e1a. 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/CA5KR2332352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466286798e90ef7a24b9ca664e961535651d84dc67405bada76a6368ea31d2a. 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/CA5KR2332353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76366cfdfcd01ce4a6191b15920d65cbdece0b326d6901476feb5fb7cbbf2490. 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/CA5KR2332354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b997e41037142f800947ba825d60c08bf35080c10307276eb8f496e4511e44. 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/CA5KR2332355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fced8dff790813ab8e0bb9d2acb101bfd4cf1cbe139dd56c9360c16ff5b347. 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/CA5KR2332356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d21b222b1fc0a491a469965b3c2e993ef8cb1fb8e1f1d6a052f7f7deb1f46. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2305518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868a14a7a91af3ec01205692d06c3bb30adfdd928f71e8e26b35029381777129. 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/CA5KR2201153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf775068107a0f705723721b4c5ab2fe31f1359d5b6f30bcad3c134334c0bd0b. 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/CA5KR0020217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d31bba2e8218c7f87ac290b334dad442356f654f3f7d7677860e0c9721b6db5. 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/CA5KR0018333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcb6dd3c0abe1fb3c5b7f6dcc1e193c194479ad4cedfef3d52500f80bd7d4ff. 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/GBKPL2164093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2631e0cfa2bba47298704347ecfb0367fc9b27fbb6accefe553ba10ebcf94772. 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/QZHNB2168940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff45af3de397ea0ca998df963ffd5ebec2ade9140abb63df07ec1a30c20ff6. 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/CA5KR2135009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29a5d4cf601d87567b02328ed16cd71f2f1ed55d763c4968cc9a38dd8a10e6d. 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/CAUM82400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1e3df24f2f2327fcaf807228d384c1632d32643ca1adb6e4488b5a51af3b7. 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/QM6N22451379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e935294c7267ef4d3497dea54050eb1434a2954e4079db550bfa1b34901ca9. 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/USA2P2401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cccfc5a01832b08a08ed1efd2ccdd31f1655f31d7302294b5a579a34788f34. 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/QZMHL2235016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3a5e5ce7e0fe9f3421e0b0a7cb058e4ace9810dd8e31998569750a5781b6d. 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/CA5KR2255042.