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 0xa9df09c11750fae48bb9a76d9f873873e7e8f83aa5c00d91a130fee12cb1cb9b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/336c8ce7-115a-4801-b2a6-5c24bbbff139.json and https://artists.proofprofile.net/proofs/artist/336c8ce7-115a-4801-b2a6-5c24bbbff139.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 0xb54e3ceeccd8691938ed32535162343b342d2efad72cbe69f32cdb7a7e7f49d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA61869471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d047c9a6175ad2acdffed3592863a0bd55e77352d337e1a52d9fab036a9de8e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:08Z), 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/TCAGP2239687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fdc07c38f90ff52d8e422b42487d8fbc16efb700829028cbd70db8fea61e6f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1H1748325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01db9a4d87b42477e98b10bf14c1287b9c12e5b4cf1d2862298f53d6bef7bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB42267902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701afefa9e27666ecbadc78ab4466c1255e36fe0eb88ffd6beddec52082e3d3b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:38Z), 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/TCAFU2167426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a356a79df41c5fe6e648e5bf072f171d8620aec423ff0793ab58b8d412b60. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAFU2167759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75954f70beda1d0e5d251bdbd8dc358ae88e1ee2c9ae9875cc03a5527f4f89e. 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/GBLPF6803888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5ff221031075532b005c768f705ece65a4e37f268a3a94d9609289dc89269c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:55:05Z), 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/TCAEX2090146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b39df46eb3caa794b4d8693163be65585cea841ad0eda3e2a9388467ac6d886. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAGF2249011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1a46a3efafcb94727d3f74133005263bfdbc6ac5c8818ea3eefb0474f08304. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/EGA252407409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107843e181c247f60de59585d468672b4b60625bf1a09b9f2d4c2d696e01133. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBLPF6807616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be041d2d7b6ce614df759ac2c2bceed7b6c66c3f34e99d835c61038d464cb2a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBLPF2400636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66d2a1e55cdc80ec1baf0b69c5b886b3332eda97965258d0780636ae72eb4d. 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/GBLPF2503690.