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 0x03a7ce3f8fba28e10d26e30258980b9cbdf588561f1bdbe244aa03e4f51d9883. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2214c8d9-edf9-4cbf-abaf-e9d7ac95f65e.json and https://artists.proofprofile.net/proofs/artist/2214c8d9-edf9-4cbf-abaf-e9d7ac95f65e.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 0xc103b7d2d05de4e66b702141367d80b235af6bfc06e968b67d82c9329f756541. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATJ732400001.
Festliche Ouvertüre in A Major, Op.96 - Arr. for Brass Band by Albert Wieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c85010995a643e2c70ff6e8c335e0d7d68346ab76ce41482a86bead9e320cc. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ATJ732400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61448fdd877034048061fac312e75b1a2a2ad6847bca18c60f7814f4ce77a11b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATJ732400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014bbabbb00ef7f8544020c097e6f66062f9e1e9c9705bfeca114f8d388e15d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATJ732400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7cbfafd19c47e7342b6ab84822f496a1669fb06da049cfb8065743c2bad5b5. 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/ATJ732400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7182a61cbba2c7b67161b4661bc33aa009f1e08ed014f4b2b4a2ded5fc5db77. 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/ATJ732400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593460517052836b1019258dfdbda5fda8633d4b24ee6456eaa37cf1b3bb2cb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ATJ732400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d834d0f3c86d351bc53ba0f3d2278b66a588858397dd4f9a9acc40718f265af. 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/ATEW52402314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd886aeff876dc31a40bd359f32932a49efaa57af77cc682e5cfa642435ea4f. 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/ATEW52402315.