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 0xfc5acd449fb4e73315c4693500be8f6b35c2ef44d15f2432109a073c39957078. 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/01f54308-712c-4534-b33b-e6573cc76082.json and https://artists.proofprofile.net/proofs/artist/01f54308-712c-4534-b33b-e6573cc76082.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 0x920140463e012c5ef01f16b3ca1e322128e0a3e2c3c470027911d52597cb59a9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ESAAI0200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710509a7a41f8e0182b7d569e5d3698683d92796080a22ddec1294d6088a790a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA71864543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fda4029e951c477f5973dc587d53a3cecd7ee5c7a542819e3d5e1c40e7fe3bd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA71864544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38098d7d60475f9683822bb0048b97c407e0d84a87a916698eceae8700793c3d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA71864551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705b205e669bed6967f99d2ffca27b14acf41909d9504725028f9e72ff8448e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA81876008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dea3d9804c253d887adcae644d64adbac34f99e9dba798290bafcf8d57e1b95. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZDA81876013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd77ab127f897b9e035ee21ef8561fcfb58b9d07199a035fb48f7c294fb9f4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA81876014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57126bf03b23cdc76ee51c4bcf73204526d81480322789bed84af2ce2734b2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA81876016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b66389486c901b94f58add03e0375f6ecaa363362b37bb8ec43e8290aabb7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA81876017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c790d3152acd03f4ebba982eb8942f78dc96f4ee632ac2066175c030064006c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA81876631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965730b9845b6018e5df0815fd6d2d6e01488a7843060d931842988922bf878. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA81876634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0155a61faac9f832d84787fb7d38aa2a20d43e2586d4fd6a7784dfe8a3a9ce12. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA81876635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd140255becdd651ef0d64937f1ba7382d7f1fa596e3c8feb18231e3dc764f8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA81876636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33de8ba8216968f410e720937a89c4646dd695e6af98aee98d6ef1787f9773b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA81876637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39ffa331cc5b7a64a5863c78d275c575d45158a8a8fdadcb219f58139f9702e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES72128022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb039dfed3a6d6cff61b3f254d1e73b05cef0b32b59ffec0db38a38d40b721c6c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFK2311710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75352b49f6253bd3a892cddb43bbe9d4d34af1ed0f5164527316fdd5bdc9f78. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEQ2492297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0110522187d3b361c05c98dd2420aa13a66647a18f84b4e0f0c3106a73a87442. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFS2466216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db80029667b43c17ddc0e77c58c600010f2391a5c81ae6775519904b04b85f3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFS2466222.