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 0x60887a8819917b08c8af4abe2cc8a9ceacc2ee745d57c06f3b774b97734be095. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fd0e02f-59a5-4313-9599-547f30c47960.json and https://artists.proofprofile.net/proofs/artist/6fd0e02f-59a5-4313-9599-547f30c47960.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 0xe7644638652d40a9fac56fd71250d0bb391720d0b5f17464cf15ccc7c079e6ce. 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/SE66N2358891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90a2a3e82cb7fdf72d1e8ac6a583eb68ac8871b7c55495a108b1b04206e261. 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/SE6XW2324375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa7ed1dfb3367cf721c8219a3a0431655393e12d00a861d136b20490273af4a. 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/ESUM72302279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06678064d7f894ec84d2af20f4519f7bdaeec1c10c77194dee7f2d10a2a96fb. 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/ESUM72301896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f93e2927bc981ff17238f9690e27408340c98a47374becd1a6065b3749855a2. 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/ESUM72301591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd903559825e178eaf0c9aeb982a1bb02a054c45ca538eadfba0849651a93a090. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESUM72301389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1d2260c4bdd46a6cc6d5f6e0cfd242959291ab58b1625e29cd9625af59491b. 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/ESUM72300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995a60a5063db6d0bf125d8bb0dc07d9ad2f112eca7e3894940a87dda399837f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6QE2238830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f96c67daf256ebded9a2aa31b50e49dba6ecafa20c82bd87505030cb8154194. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5752493516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc5a2ae907cef3c2d351b2473571b82ca4fda3382f1db193ab8d936a6c1bcf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6QE2420307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8c206018201f5da0bc77ed7e5ad1b01af8f22ff2d5c04f43228f80ed6b626. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMF2465207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1630abf2774255caddfac7d29ed8da9ffe90b288fd7af9ea06e26431a9a1349b. 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/QMFMF2465153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849b781443678153a785c914c3eb82491680e80b6796aeec426363c029d7f6eb. 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/QMFMF2465191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81928e7581c89191df086e83d940d0699f7f3f7e69f1dcc27bcb761551812166. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFMF2465125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279447532cb976393416bd7f94632aa561c99c7b2fff51b06e0131564449a1a6. 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/QMDA72489585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b23450ffee85b58cab2f7d41e1f641633d21c29579e59e7a780a579b6078aa5. 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/SE6SA2410123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a27411dc121b7a320ba142398f2dbcf096c0548ebc20e18b806327625581c. 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/SE6QE2436364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01adec5a63afc5f426651bed3e7c0f69a01451d655a01bf2c269738b648adfbb. 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/QZW9K2415086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55eaae460f5d0464b81d862a39610bc9bdbb3faf985daea9dfbc66307e98196. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZW9K2415088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de1ce9466988bdb3d8ff7e61c5304177d106a1fb2a476f226242201e5c9669. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZW9K2415084.
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 0x938cedefdd707428c3dc660d2c833f2124b5375ab1c435c8af943736aaf6e899. 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/SE6XX2503005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac3cb1576de92c793fcbd3ab43e80b6b25f34ecbd0672dc56bb72a1b079e22. 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/BK4DA2513984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3402d52a8f0571f672563f23fb1fff7dde08366d770078da7675ea51567f019. 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/QZGLS2571848.