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 0x5638e58479691074514954e3dfcf283cfc57b13c4bd00e31c771fe50725be87a. 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/acd181fb-75c0-4ab1-b583-5299e7e29a12.json and https://artists.proofprofile.net/proofs/artist/acd181fb-75c0-4ab1-b583-5299e7e29a12.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 0x97242416f43f4fd3a568d4d488ec48622409905ea4a2ed2e160eecf0e18ae3e9. 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/QZHN72357850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c460fca0435f7106ae253f52806fb24e047f0da155bf828d73c8b2156fc63. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN72357852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b995ac9ea5a1cbb9d14682d0cdfc50e05ff527a434cbe697d94a2a49688011. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN72357856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72952a06543bbd056ec33ac685ead147e1b42aefe38cbae52e1d3d7ae29e6745. 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/QZHN72357858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6380057bc7fa092081b43fb6363e75d274dd31e2e0319075381e019878064c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN72357861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d47185422fc35e44a77c4e5a77fb84c185e54bb3ec839ae2bee8f9684b683. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:11:14Z), 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/QZWFM2307374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb5fe0b0701ec6be13894f0f6194199b3ab6ff190e8125402e1bf074f159e30. 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/QZHN72434134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eda41479749b59031b06cc10a91884e7de85590e9a15fb7f30b8cd29c64be0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:52:39Z), 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/QZHN72434135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf05f97ac8ce8f68deb980572a325fc2dac78dec72fb35a2f5d322a99d92e5fb. 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/QZHN72434136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a16825c3455dec9e616360c94913d8bd208d9299934db14a6ea8e1effc2a92. 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/QZHN72434138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4addd9397545002ec3205e1c83b2d8806ed9d8a08dda48b87151214d2b8c29b. 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/QZHN72434140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd921f587e75fa290498249291635f552de59fb2366b0a248079f88a7952ef5fa. 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/QZHN72434142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354e96fee97388c6794f21fc07083e375ffc0d5cdcbf52d220c42b4953a9ef2b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:01Z), 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/QZHN72434145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d054b59859421f0209414d2a9c787bdcf85ed78f64b4e57cb1518440c9e8b12. 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/QZHN72434146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73b2a444c77194ecb791c86f98f8ec649bc1df7dbe4ae6059cc4adb00ad3adb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN72434147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f5c6807ea60d16562afcb0840a2751768f2ef95e310836485996536b6988a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZWFT2456350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd27a72233ba32d6e9193f71661a5eedde7ce60eef9a0f42cecb977c0a6f43d. 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/QZWFT2456351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc268ff42213094619c315d49b521ea974d7ea69cfc00d1da49223846195810dd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:55Z), 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/QZWFT2456352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bf12fada7899bb5ec3acab3fbf688090cdf03aad28448057c144a7e18f70ce. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFT2456353.