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 0x7fc8819eb3d9f4c01c07f10287a55a17448d23ce597e8c56482f81b3133b384b. 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/674bf9c0-b437-4a47-841d-9b9bfb6cf289.json and https://artists.proofprofile.net/proofs/artist/674bf9c0-b437-4a47-841d-9b9bfb6cf289.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 0x76780ad3b3282e58cc7a47053e19bad68078265fbd6013af4cd762ca96db2c85. 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/GBKQU2459877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022a1bce78f26369ca9d6871c1e2221638378bda7ab62aed5414bc6c7b90c6d3. 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/GBKQU2459881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b3d8a156cb5867cc8a97b7ed2064eccce3163c34cfbca6c235bd8acbd7bc6. 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/QZTH92350170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d113506c41201a4ad9faa201a14b50b2217be71a07193d24b7a8eb3edeadee. 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/NLCK42232050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96138f4e174ccc0e188c188cb4c3d45fa22a56586ad4b10d0e7d60a9a89820ee. 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/NLCK42232051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d752f9f1387c29e55544bffa14fb21b15f6a12b4e3c250cdb3e057ee30c4ebe. 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/NLCK42232052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e691b545a9ac73520bd5d32aa2bac0859365ec37349727ac20cc2022aa5822. 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/NLCK42232053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138a944157a9b235c2c573885fc3ed3cac97956d32b8741ceaf22d0d06109b70. 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/NLCK42232054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0bbc2f2bbc216338a2db9f020202943e49e6bff49c79730880a83a4b2387f7. 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/NLCK42232055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc736a3540f7e4389a923816a41b97919b413168d6bd1453bf947e652163cd37. 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/NLCK42232056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a3aaf0d9b6a74fa537bdfaf205e065f5804f395df2d319a4db9b9b55b95955. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLCK42232057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae8c2b473dae167396c8aa323c423028845b4204b0ac8c92922d8b3770d2c4d. 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/NLCK42232058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82d536a1d316bcd391867f731cf8018227c205a43531aa7b172beddd30a9e1f. 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/NLCK42232059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe79e864480dbc9b404a0304d7a3e487e0f3a99440a734d83be39e623ef7df24. 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/QZTB32436388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8623a282067df884b78221f04671c24bd3aec7d29f57f2e5f9a33b8e399cf48. 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/QZTB32436389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7b96055874860c5999bd005c2ea3301b07afdd58c5f730891706aff43d573. 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/QZTB32436392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57da0d912893131c1d4abd913718542e1343528dd866db06bd3505ea87f9d4e. 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/QZS662486588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988ec271b4cab62d99417b0d58daddc076c610f1b3cc472e54c73abca8ba91f. 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/QZS662439987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc640767b247388b33cb2d12110ace9ac04b2ca02bca1f3542c257f05ab6eca3c. 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/DETB32302668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896ba20697365bd723be1c4069bcb8b68b46ff698a07c1abb9c2d4f94f2c3ce. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DETB32302669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896eee134caaa32864fb7daaf8049f8e5f2e6a97116163ec7d9f140689d83420. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DETB32302670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38934c612dd2854844981ecad9388c5f6d3f1ab90b4d05c51015d628b72c4138. 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/DETB32302671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1cedcab35bc741d8cc8f5e27a097775902fb1a6648de588c8c5ebce48b80e1. 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/DETB32302673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e69afed88a65ca810fab030494efd9cb402f34f1ad21c6de76b93f6ee2629. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZH5E2320803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563f86f30f01545394a8e1d7794c863a007acceb5356a8f4674a8d3f63216dd. 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/QZH5E2320808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4867f716f1a5c0369e85bde638f4e44d20ce91107bff5c47459c292c2ad9ffd6. 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/QZH5E2338558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f689dcd465de9872d886b2c2f30a49a61cf18be6482ed2fcf4406cb7de3a29. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:11Z), 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/QZMHP2390717.