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 0x2c4cef17ba189e090f18155e876b820bb61045a3b9db92df0212b6daa74a6b53. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30332823-8876-471e-82a3-a6162ad95eb1.json and https://artists.proofprofile.net/proofs/artist/30332823-8876-471e-82a3-a6162ad95eb1.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 0x35a523020e3968afe452c29e57bba906175310a2ca3f0327853590ed65277ea6. 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/QZTB92368128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ab16c3e5d87e6851d7636a2bddc4a8544a504db1ed174307369ba28a041f4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZWFK2347475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f8bc93c161d7861d5599156c565b260b4ccbecd0335af5973fb3d760ed5b0b. 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/QZMEM2483865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb28ee44c799b5da462545dba9bce9b20f812757245b7294daa6ed71e2ee6c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWS2464355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d00b420955ff34036503b5643e10ee793971614cdae36838a816c96ff082431. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLS2418633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3678422d1606263006130321144354e0effa8e6b6e26d9ac7d5fcb6fee91ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFF2448177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308e6d779bf50f73d7518591314129101370d275a2f0108e34a10c4eca7587a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFX2410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84dd29397223410c6dfeb0821a07800710d5886d498da4432c63b7fbc0cd173. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7U2467684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9057f456f4d48b900a14e4f4748dd1581d4e422c43b5d7faba0aec418ab422ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72572181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f07776a03765e484f7b8e84f9dea7bbfb8fe0281e2e2b8ae2ccde057d2dd7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ62509026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a2f5048130ae88d980bf56e8938a6dbf71972d128a3cb912b50921cb4142e9. 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/QZNWR2513033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa226075c3c3c1c45ee8a73bc9b8aab0bf54b3c0054b4b378850c8cb474df5. 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/QZTB22552681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a9eb067eef6cd9df05620bfeae73968f9180b79f58d1fadffa7955b5378b3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:34Z), 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/QZZ7U2575813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d64b225b74f1ad5f9f07d5906c21bc824d3f1d1fc65e80b5f877585c8903b. 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/SE6QE2473070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f24061c7bc31eb397654cc625113b102acaa33928c09c9414da02607f91a86. 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/QZWFP2438499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78d09490f09612d2fc0032ccb5459ff0711a011f098b372baf2460891bbf70e. 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/QZDA42431532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24369081b53a14c8e21dd1f138b05b9a75d281a5d6ff87e0257bcfc7ddf78447. 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/QZWFK2318260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb98b1c7675df15f572d1e3e38bc7b2fa86c0316af9c8130c5d945f62dcc49. 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/TCAIU2450946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a46f40d075f535334c985a1f73b8ab46650c51f67176c933c0d1fd0ae56f07. 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/TCAJD2594664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b94918230ccfb3d04411e598b5508c610ec4443617a6a21752f88b0d27e147. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6M2455540.
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