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 0xfb3dc8cb7ff4d518ff419a1c1effd42331728163ff0b7d5ce5a4a3787a857754. 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/ce63bf98-d11d-468b-80d5-1a1d407b04bf.json and https://artists.proofprofile.net/proofs/artist/ce63bf98-d11d-468b-80d5-1a1d407b04bf.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 0xa044c1c51f0fb8224c32b75ab7c1738f01cda5fd3db87903e1e30c1cf856febe. 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/QZGXC2400598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9239f655ebcf5fa43f0cfaa212703563853d8339fc32cac45a934c263ff4fe5. 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/QZTBF2320338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbfd3b39ffa5a0adaabb887023591a8618a5582ca77da933749c4d620ef0863. 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/QZNWU2317981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeab9a56a309a19bc000767e4e70446aa6196e8e0aef20eb9543822c6666e4af. 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/QZTRX2375793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a889a48a6ebf967f45d0fdfa20ce6474dc1dc9bbfb0b2990a8df13ae923011. 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/QZHN92347031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b964c7400e34e5d858879dd5723d19d1188cb4b9c9c571a2e72bc139740661e. 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/QZFZ32362711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce9d337a36d398fb37454524f583231898e7bc4a7a9f96c0f81ce48fd7c6e29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLS2230031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ce0ace463d63e93f9992943d8a3d166f4f8598561b0189677b4d5534ed013. 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/QZMEN2001380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bebbd3d3db7778e2ce20095b397f332fe45600d84855465223a762527a26362. 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/QZWDD2369870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c5a0d28e31d685e0991735f1c4456327a7e2aa1cae7b2a7aee7a93b674a24c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWDD2369887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffccd2de379d8ed026761166e2bf6af8f4d380e39614f553e39dfd2ea2b04399. 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/QZWDD2370235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb64a4ef0b2211e97cc1a32b5de3ed1df1232d7b399612882297eea63c8dd64a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDD2370290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7e3ce8f0aef6bc02b0f6b1fc114e0be6ecf6e92d8ea4c87de7bac413e9de4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDD2370294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f267ccb5fe2e3697829d0b2388944e2752502dc652047dcef3d18394be56b. 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/QZZ7L2410677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac5c675cb817449f558e69b2b249b32f7c40f4f71d5982d579fbdfcd049609a. 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/QZWFX2487314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa044c1c51f0fb8224c32b75ab7c1738f01cda5fd3db87903e1e30c1cf856febe. 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/QZGXC2400598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc84cd29fa8ab8b7fca8d643c15d3dd9943d3ac3c6e969beef75496e65dee66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7L2488379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4d6d97c1a009e94b5f294d6e4bae200c01bd8f820f9a68536862178ac4ed7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFG2403199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b11f66ec9dbc2faf80546e523b67e1b9e5fa3a24026e7cd38d9cdb13b0ece. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7L2488381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c6e9d6a402a5ce17ec517d33664dd953bc9f5ff2ce4dd44e0877c12cdfb1e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFH2438617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e162a9aef58ee595f3973b29918458fcf37693d67bcf9faa1c9cbbd05b6736c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFX2461882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f267ccb5fe2e3697829d0b2388944e2752502dc652047dcef3d18394be56b. 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/QZZ7L2410677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc304eab3a9601c3b91fbf58aa98ac4c84676555ba89226dddf43ae475c0887. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN52438973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47787aeeef60125de05e4e7118699318989078c766f5ba146d2592ae5a0df73c. 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/QZHN52438975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670ffb7e509008b6569c0547ae950617e9129c681c8cc9b9d1c03496c0aae3cc. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHN52438976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8f24c3a52b07d2ceb1bf243c5098218746bf45020b531ee0902b448b815ebf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN52438977.