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 0x49be4409c27e2bb64763e3b4da54faa0fe3ddce3563be89f8537febc3455db7b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30781cae-cb5d-434d-a5ad-265aa9426ce0.json and https://artists.proofprofile.net/proofs/artist/30781cae-cb5d-434d-a5ad-265aa9426ce0.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 0xecfac8bc91ce68a880fc557d739430e7c9f55ad2d3c458c78ebb9c19696d548a. 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/QZN882326238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f5067b42e1556944176619af06725ac504091b1e49252fe3453d720b83308f. 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/QZWDW2205025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe3efdbb3e050e7c9f499bc7846d9b0a98a9107b7a5ab09e06b9c4836e63d1c. 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/ES64E2455759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125d90d329022eed78a96c49563dd7e9c8923165d1f10a0faa7c998f9808501b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES89E2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbc325a3673bae3c97cd8b064c20c2c408879f08e23465484eb77e4ca4514f. 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/ES89E2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fca3153988610d58da0da00ee2020996ecdfdddfdb8d286104605e0c306611. 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/QZN882250809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b75edfa18906035bd7efc792b8502776adecca32eda429bd893c4c1bfef4143. 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/QZN882157538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d97bacae616fa0db940b13d17e82e97e931b7837227cfb47d0ab8fd55bcc80. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES64E2489311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eecf68bec329d1e1d432a89375807e96bc004bfe27bf8e0b71777fa6859c2b. Chain 2 (Bitcoin): anchored in block 956970 (2026-07-07T00:37:51Z), 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/ES64E2488633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4893e92759786e85a9d71122bf1ec08ae3ef21d47e4ab8be90f522a9663bc9. 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/ES64E2487101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebfd8abb2ecd00f54743a61b47eb97814ca99f1665bcead275ae84cb5834f26. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/ES64E2472003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98cab43c8dc0fd0a55b37341ddf31ba3ae6ec868c6823650943c26577d9a7a. 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/ES64E2463572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba75519144d33b03ed86974380b5a1b6c752ed83672bdbc9abd4d64745d668b. 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/QMFME2314283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdea21a58f5382879c1537e9ce7c6a49e8b142999d581eda0340f32c891387f. 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/ES64E2302348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125d90d329022eed78a96c49563dd7e9c8923165d1f10a0faa7c998f9808501b. 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/ES89E2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4e0a52e8694b47766f3d2e7aaea2280dbc29e8c13fce374c66580367e2e10. 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/QZN882253407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50446d2c5007fde77e8d30d997bf8f0fecd9ed4341b2f3b2feb977f20cc993a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZN882253408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001b2ee325b479fd3b31109b0e27f7cc241c5021fa90eb6d77d0f6b6373a66be. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZN882253412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fccbbebb2228c2cf7ea7b9241e321d78971abb80507daaa9b25cc052a6cf0eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882215039.