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 0x8ca6624bed6f66b589e1f6ca287ff11bab75347a3d081473bc47219b6ead9b84. 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/29d30dd2-0b87-40e0-9c6f-7e8a23da0e1d.json and https://artists.proofprofile.net/proofs/artist/29d30dd2-0b87-40e0-9c6f-7e8a23da0e1d.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 0x33d61b13b77752e71c9aa5e1044c37ac3bbd1041a537f6058eb685a3d3a036cc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZ4JJ1911624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dae36c007787b97a2ad3e7d252e5b2c39c63d8ea6bc8497c302ff82f2e5be3. 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/QZ4JJ1911627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb3e489853218b026441737e7739c1dcbae49822e4ab31698f850f45b37ab0. 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/QZ4JJ1911629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a30c58cddff7ae5df5080b4fe5236b1a9a9988b4aa55b164bd2647620eccb0. 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/QZ8LD1903371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8e5989624564b359718cadd68bc2f30545e784ea0bcec219ce2b9947e6449. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZ8LD1903374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44314239789a9b6207e42fadd073da5fbf739050150c169831ce5adeeb6d7074. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ8LD1903375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8665ab8ea5f432555afaf1177c5eb8006c471ea624fa76ba8b1f854e7d73c90. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ8LD1903380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db53db96337c8eee223e22db1b8e8fb874e1943d949acc97952faa18efa1d02. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72071392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf067f73e081bd68f9d304a3c5913431097e16e056a607c9a3fcb1c89ee9be550. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:18Z), 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/QZMEQ2204139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b7e3477dbb0a22e0ecfb124cd1b8e656abe276f954fc1d42583ec8cbaedad. 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/QZPLS2529091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91939841507340acc321c50d71278428ec0ef3c22ccb8087966b924f825f2f5. 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/GBSMU3353419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a18f774991a1d97688ab5418f7963e08ef0e6ec8729d0496197cdff813fd27. 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/GBSMU3353463.