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 0xe87424337801269401aa55ab1a6aaa1602e2f7f9118066c49696e30dc6c01bee. 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/a4ce1712-ba00-4ace-916a-3a4bf3725dc5.json and https://artists.proofprofile.net/proofs/artist/a4ce1712-ba00-4ace-916a-3a4bf3725dc5.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 0xf6af832dc599886a7b643be12cd803f1c35c7f2aa451f451127955d7638e9d11. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS652276285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b41bd74bdcfab394ad8c3e497338429bf3e25b0228436f9750c01f1a32085. 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/QM42K2358018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e83f81ae8a94f899c3a367da302e543e5dbb5466a0372d8333807601d93fe7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMHL2319870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53071a04a8614b72b82650329b6027a55739f1099bfb7f55393751356273d13. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZS632318475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e23f36f474dae1e68b3f69b23083606de862b315c5bd3cc565ad3e99ea41c42. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMHN2354225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ac6c58a1a2ff238fb3523a065ea245fbf2b581ed138198563b6b54d782264c. 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/QZDA52426108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07fc691836fbdf14b0523c665d1218c24315927eeb9a1869710d6511ce0e845. 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/QZS652288667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c107083b425d56a6c08dcce4babed84ffff16fffac7c7be18c29bdba361509f. 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/QZK6H2343002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70e78b1cae087af904d77322f218a6f31694b62356ddc2279cbcd2bfb98355. 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/QZK6F2449432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4565bfa4797c8c06c6856a40b3e4812d3038587f90af319469ec0ba0ca3335. 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/QZMEN2485010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a56a7cac86db6f30ba64d6252c0a19b908a12a47299f03abd2f000495b9056. 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/QZHNA2490182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f374854aabe550fd01edb714bfd6fc9141da7ede6eb7ee99515bf3e31d7662d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB52369756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1fde6ed9ed893ddf1afb3c0fe01c2f9c3ff8a4a6d7df0516b1423900afd148. 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/QZMHM2332177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654f4c9e0b91d3bd688d36e7efd7bf826e9dd5d6de7499750d9d15a24c7eedaf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52491126.