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 0x39fa74eb626e406af8c1db85481d6b93922c0e1f9682cdd4f98b323797a8a767. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0958084-3435-42a4-9c78-6a58a85784b1.json and https://artists.proofprofile.net/proofs/artist/d0958084-3435-42a4-9c78-6a58a85784b1.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 0x70185b7686e80d450413721b100a31f622a1fda805b05df13eb3368317ec3b48. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82502477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a170950a6bac3e253854f5a6e46fd4cd5f5d5babe892d5b901c8bd2ff947f07. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82502482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e401ecf45488a5c3302f8f123e527ae0680bc2d0bc363032f2e5bb5f5c2238. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:40:38Z), 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/QZDA82502475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e6d54fe260750b022a328aa601ebfc0bfa9f8f2145867b9d0fe1a1fbae695. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA82502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9629d415a151e6532ea749554b5d74a63468433be01237448e66aca3b80e40aa. 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/QZDA82502474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2458c4bbc8e9c503768c4a25b9adcbe90790babb71ce985c8687a66c7bb569. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82502472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ce6420ccc9496cb4b80aaafe9e851bed173948fe188cbb3543f07ca7ed712. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:23:42Z), 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/QZDA82502510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d827926070322e2d9fde1079c56eba6ab674fa8b7c23ae221418d84ffb9b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA82502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848767bf5fee0c766e7af26504a7b342d96c5bbf3ab736a45b415167bbd915e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZDA82502488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d11c7622f90f0e71b36119dfe129ae9a763a34a6ea2deb8d142b7160d1c866. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZDA82502478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50919d5c34252998e01475ba79f7784f90fb3239a5ecae15ce15f851de70acb. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZDA82502464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9c7726ca20a7cb08cf9025a80a9f61ad1555218dc98641d4959b1ea71f7fe6. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:02:44Z), 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/QZDA82502459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb3cb4fcede16ff2e61c83063066fef7e20775f2c31a6281441f6d04e8a65da. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:23:28Z), 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/QZDA82502457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1992d9507e596a20ec0c322195c06de6cbe49ab6854fe3e6b73306ece585da76. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:24:01Z), 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/QZDA82502492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e53151df815840bc67fc9a8819125e2046fa91259b8ec8d2d30a093ac6dd64. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA82502484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1733dd9868b16107f6842882b95a77e74e684ca1c430e5ca11a4dea0d243f6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA82502461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45405be5e34cb59497651aa839f3321a15555f58384bf905c569c89ee94a6ed5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:29:53Z), 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/QZDA82502458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7487412a8671eb84ef4b7df2a93aad98ed7d232b17d0ffb2ade08b77149032c. 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/QZDA82502468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864eb013587c7dd2c52c6dd0f46784c311b090a3a678f783baa032a9f2c63534. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:35:32Z), 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/QZDA82502503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f1f1c5db17852e19023431315c3c5ed8b2e034dbf492163823ffd1f6f53577. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA82502460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ffbf3009637f4770aed69e3e4cab40dafa36f90c580a5225913061681c6744. 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/QZDA82502496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac91301a3c72bb6cffee19ce10b6efd8e8aad39acd2037553f17d88954de693. 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/QZDA82504049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2300347f4bce5932194eed7f756090753444e77e30b8ff8ebd1dc7db095d7. 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/QZDA82502466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb6066d829bae2ebadc52a4c087abb4c3181bd57a1c56942bbc3d92e6edb334. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA82502470.