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 0x0f562a0fe9eb0a35d7236132575b44e71685325ae9e837566482b20b8912a851. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d981d991-a6d8-449d-8134-eb26d964420b.json and https://artists.proofprofile.net/proofs/artist/d981d991-a6d8-449d-8134-eb26d964420b.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 0x5702893e98a8b7ec8d2fc5f1311771fb4c712da1280da9edad7c0206cfd8a8a5. 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/ES75E2306695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39adc817dbbe24d30b42281fd7722d36aa094424cfe6941feb58639d410fb0c1. 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/ES71G2338393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6564a17e195b92059865af58b0fcbdf6895856964c713624e47a74ff75e19264. 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/GXF9Q2456953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998eecd7f70c93d44e76887c125ae5cdf06f89092e853055b04823cd18f5cc06. 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/GBMA22434055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49c274e1c4c89d47e21a6c8da8b318c6f88f014af2dc8573735d10fbac2fe9. 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/ES31E2404698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db80ae2b0cb151b66e72860fbfe63c74044239c8af21a65cfd57c72dbab942. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES31E2403709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ca7f3b59ac3e11385034853e83ee2c2810c4a5f821bac076300134cc1cec2. 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/ESUM72303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716cd993fb04572c3479fd5c17dd55602bf70349d4cf8780078c74d36519cd28. 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/ESUM72302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a4d9ff4def88b1a79f3d18c03d33ec6d88161a7b7b36e6b7cc3f6497f67bd. 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/ESUM72300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408fa7e1df1c29e191169a39662786789f0852ceab635b4cc6f8ec686f181ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMZ92178822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb01c4eb1f87ed8b2018602e2c706fb216bf3ddca0b2c81a16be02a099b30242. 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/USA2P2113321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f4a651669a57f69b4146d6697a7305577b470417b284e2bd8cb67f666bbf8. 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/GBWUL1909926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0046df5214a546917a14d21ed9fe57a07db42a3de40c8850d235db905b6d406c. 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/USUM72304040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993b8cbf5182e3ecb0cca6f1a92ef09f9f1ae166a581effc025f3e21ef0df93. 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/US2BU1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f683e5b6f23a5ef14dd753f626c9a2bde919ec83ee3487f774af0cbe608e416. 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/ES5702200521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29b61d9a94896d99395898405435fa7342e2cec6272f3facea3f49a6f69a88. 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/USUM72203330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5944450b525badce4a977338cc0e59a2885ba21a53498cfd4dc25074924f4948. 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/USUM72119612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2565249d463e6168132ea4f894b2b74dab501f639a39c7aa856eb4b6d2ca99d. 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/USUM71607007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d7e3f17432fbd9662d29d059de4def07d76b352f876adea6624303b19546a. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USUM72219486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d02b95072e4f0f510e992dc352132a66e2ae70fae6ef880a45e73fae2cc4b. 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/USUM72201829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf5ad07045882bb1dcfb6cfd7dff7b7612be261e31cfa9bd544c3ab1bb96e3. 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/USUM72222460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abfa03f1c9e6ab5c76fe84708420ddc913fbfb06dafc4b031b18c3b3733060f. 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/QZK6J2429909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a392bc92a803f1f6b12e1da6ae7c11aef661ce5e958bc9607a6ae8fb7cde046. 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/QZNWT2449831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f3e83a4a8ed0352b52f263d64cd14053a382c59878ea54808a0cdfb4ef1ce. 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/QM4TW2558505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ab01961599dcccd9f6a7df3020799605a7c22c1e3b8a70fa9ad96f6662192. 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/QM4TW2558509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e36275e99ca5a02fa0c6da66474e6df86979a29d2a5c0a2c0739779d7516d. 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/QZTB22473900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b8bbfed28725fe198ed5289dafda9af9716a395120b5f370df1a2969975e11. 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/QZWFQ2426256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db80ae2b0cb151b66e72860fbfe63c74044239c8af21a65cfd57c72dbab942. 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/ES31E2403709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995dee2f357f43a70e00688c9c36f77e9c0c46b6d04e51b8cf9369cada5596bd. 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/ES31E2406541.