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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d4f8a16ec0122dbd9980b13dd323c155a209af10488b732e63329f0f8f6ad. 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/1a206ac9-80ee-41f4-9050-e04dd5d009ec.json and https://artists.proofprofile.net/proofs/artist/1a206ac9-80ee-41f4-9050-e04dd5d009ec.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e364685d42e1ab21ea00bb91dbea68b18a35103efb50788087c4a7cc9be7c. 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/ES65E2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1f36b5ac24ff56f05c9d572c56529c37edbea71bcec2115f4cf3054b81e59b. 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/QM7282343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb16d30f99b9a2e242f006fcdcb8e8a0cab173ae2a59991bea0c11b9f061ee8. 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/ES64E2312802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff28cada252b9ad877a9e98eca53a08ffdcc26245117e1df2fc96766b961ef0. 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/ES64E2309936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b63f14a9d24660521bcc174bf544ccec0f293a8aa1086c5bad04600cdc7dad8. 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/ES64E2303233.
Mario Los Códigos: The Room Studios, Vol. 14
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18519d1fe6df5d44c5079673f7041f4dae0432ec846b39f64b5c9f6b377e83f1. 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/ES64E2301703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b3ece055ed4fbc092d18ffca567451d9b12b1f97e48a1962c8b7153345e137. 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/ES64E2300725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696d544784f87c99052079174d49abe2bfe1c94ca3e9d0e31a02cdfff5af6c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES64E2204673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29501b0194e5012ebe8e2f830965b4da6a50466df78e20364e6f4c605e9f0617. 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/ES64E2203413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c4e7b18312c055ce5d9146907717c29e1fa86263a80a75cf65f1249b4c2ac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES65E2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091aaebb10d138327419f7820f19a1f0885dc6a422197cc9d9604d7dafef0d22. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWY2112130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b5034b77f0bd8352444f6e8994497fac4e6c235e6cfb528c5c912cf9932dc8. 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/QZK6Q2170100.
Reality: The Room Studios, Vol. 7 (feat. Reality)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72664b8210af1710c6a388f3f55474cfe8288af7636388cb12af5c3d420d25. 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/QZHN62157050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7767a354441d6a13f04562229988f9deb88d63dd098580fc24dca8834e2dbe. 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/QZES72139508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7767a354441d6a13f04562229988f9deb88d63dd098580fc24dca8834e2dbe. 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/QZES72139508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c09b0f7257fd705da16bd69c04f58a75570663fbcb98ba0f7e6184295fd4184. 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/QZFZ52154177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097846d59c830211f176b8a5e9b3de746c5963f4f7f9d26fcbab681b64660277. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYX2199667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80beef4511b3e3a0df6f69c96caec9d97e9c4f2b87e9772ba728ede85fc9de6b. 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/ES65E2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091aaebb10d138327419f7820f19a1f0885dc6a422197cc9d9604d7dafef0d22. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/QZNWY2112130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7868d45f7075a257956143426078180b20c1060fbbafd80547080ac061fd2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES64E2200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00235c7a939080001be50e30348cd7edbc699c94c1e633aad139aa38d5fbc19f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES64E2204674.