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 0x0f0667dab77e0c59163682f4a8477c5b8e4f681895e260d1e7966ad834672ba3. 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/37bc70ce-448b-4f06-8e26-efcf607c718f.json and https://artists.proofprofile.net/proofs/artist/37bc70ce-448b-4f06-8e26-efcf607c718f.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 0xaedc2ce733052cbc8edd66aa42d4ef8edf3dc9e036d76d75637516d732c16e38. 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/QZHN72334925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe848923798da7ab4bf66c72a139cadd73a675bea06d3ad9a3e81f35da17658ee. 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/QZHN72334926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b51ffed62a876fdfccf02c24be30bb2bd1270c6541efc010284beca34c4a49c. 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/QZHN72334927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e89cb82616b6b27a254ec6936279ab03390b7990f1c986517429d67f592ce. 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/QZHN72334928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a9a206eb6a6d517db9b20e76fdabf152651d9aad92ab972946b91354272dc. 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/QZHN72334929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb41af991c4fbd6468b49a6fbba7e1af46c657a5fca1d8538f2b3d7e4337d5. 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/QZHN72334930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e645445e560ca6dfae5003e10d487d55e7fb9be467888741c5173a709fd9283. 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/QZHN72334931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2444b85dc737d3f3d09633b66ab88ef95df95062e9a8057e09f6e371185bf07c. 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/QZHN72334932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2d5276a26a514c1579b11237e10ac1d5eb9a6fd65ec9b7b586ec36a43b960. 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/QZHN72334933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878ca2847353d03b5bd422a2b634bc26c8209601f3f279c658c6bd6828025d1. 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/QZHN72334934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0656382e76202ae193849a591c10ce086146d288de21f776350d83bd1745724c. 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/QZHN72334935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d5383927d72d0ce3c5b9be8a16a957f383fc588ee3bfd3b39777b639286d38. 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/QZHN72334936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc171921493665a089111505be224a6d00dd918b7edeb06d43bf07731cfb3eb. 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/QZHN72334937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70635914417da301ce7400228d03f511283294a7c362395e8ad2d7c567eb9a61. 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/QZHN72334938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5766722ace089d2d29d775ca74fe149b4853ea6fa9afc4bd35a039f1e169e. 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/QZHN72334939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d32fa304aff0fdfcc3bfe3c6c9a400aae4361d4bffd10b94335a33e552679. 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/QZHN72334940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fda8da02dcb1d84db9751a30f1e4aa44c3003a7179eeb19f182073735b697. 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/QZHN72334941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7756d7db9e1ea2a465d091c7dc5d1beef3768732539afc98ad56e80798bd5a. 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/QZHN72334942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70ac96b4844e2e6bd8b67ad024fcbbcf061280ed80923a80d41b7f3dffeddf2. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZK6L2314743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48974e29fc383022b79b774f70f2a88518b3d2a50ffe38619921e5a0ce52a3d. 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/QZK6J2549962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcb58f50bd61768fc39baac5f4890148759a0e32543d0045ad873f5a190a11f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTAU2453406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdee630843141e0709f1609a867367dc066f67329e23936b0c5d434ffb099a7. 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/QZNWQ2409794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5330fcca279cbf98cbc1aca9aea0f90b62ba8c8bd4f8d47a83c97391e216d430. 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/QZTBA2330827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39844c483f2d9ffed956c2d58b7ae3ecc4fcf1c9a406ebbcd07db99f6441b4. 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/QZTB52338218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6346c6e683118139c423ca0c243e1ea3eda0f59870dd231281ccfc3eb4db334f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTBA2330828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e9f37cfaee8c8691091da246783f283026cde8e9402f9e94e04a99ab09f47. 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/QZTAW2314422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b4a1e3eda40eb97525d3f8b125ad8d5d1ce80edc79495fd0ca022b0d6480b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6F2385993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee3e9c977ca0e76abbd96501a89a1bf48a0a3b249a19851a87659007893509c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6K2368306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e9669d92f05e6238859852c9f94e6848b1c46ce6db66bfc90216eab3b7db0d. 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/FRDKW2209306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487365c5530184c096c1621a723165fd334c34e1779714427b18be6a275ad488. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRDKW2202473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66cf50c253e58de8508f9910fe827d024d93ee6d3fac4acffd08ad0c7247213. 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/FRDKW2202472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e8c5fdeb1085ae09077d2eb7437278e59745e77af1c0bfc782e07e4c746e0. 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/QZK6J2459215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef85dcdce8aff31213edc9e3f4c1077a863c6774b1339defb6de83961640f0. 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/QZK6J2459216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce262dfb867ce7aea6122991c43c8f9acd33033f2c6cfb6e49d5683829c8697. 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/QZK6J2459217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33dc54ea0ddb59d60c96fcdaceecb20e806f00c91d292d57725e978078e0132. 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/QZK6J2459218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4124ab1f0e528902cb1147f146bcdd803afa01321579d5939bbd44dd8a1a3. 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/QZDA62432242.