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 0xece0f398b945ae03dac7752a4aa6facbafff1e0475b75d109a8e06b471769c90. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e87f46f-06ad-44a0-ba07-68be96d9c6a1.json and https://artists.proofprofile.net/proofs/artist/9e87f46f-06ad-44a0-ba07-68be96d9c6a1.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 0x25c1fb11ad4a5b5b8dbfadab2cb031b1c8d91a6202008686076b88a3b33faf32. 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/QZHN72494936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b8a00ffcc6e07d331f08eab4c0c1f4aefb5e9740edc133ebda1c2f1cd07aa. 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/QZHN72494937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082bb55eb391a8122f6e8b14e6d63fea5d650c268ef1a910dce9b4234215267c. 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/QZHN72494938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5bc4a51850d34ec8de3b15974e81f561d8c87cb7c043c8fe709872d29a36c. 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/QZHN62454018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98f14d0369d293d9e1fafc3a1bcfe0fc26f24fedd165ebd47d2bc4a89315278. 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/USMH92370282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2160f6f6d690a91d3c4a7a6858b66e706ad84f664a4e1a34d322c36eee85fd56. 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/USMH92370283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878f633a7d8c8706b54e85b079a8bd02dc2e3883e9b0abe78794d17adfa65bec. 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/USMH92370284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ed4dd791045e9ac027fd9ef47a5274f469f77420c276380c8566109697c2a. 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/USMH92370285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2930ca4f5bd4996d536d3d3f973b042e561f59c92ef3a38f1afc7fa8e16e53. 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/USMH92370286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb4a7052ba872326dcc0fb40be2a04a92aac2b00532e35cc3ec896501d2d41. 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/USMH92370287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26587b4c04761903e1bbd06c16ac55780a5c54df3fd3bb9f179177b5f307dd6f. 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/USMH92370288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded3ddd8a1f6bb9e1b7722d4acd22d8ffb15994b8cfb106045a44f06a70effa. 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/USMH92370289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc34b69d666740e9e678238d79693223c18a1d7571015569dba0d28fede2e67. 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/QZQAY2466086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c91e3987c71130d532c6319660ab70db1bce933e9eef1525dcb8ac921ec864. 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/QZQAY2492994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6599ab821d352e9ef4546a013545d82df6cd28b1b5e86d47e52bd776a32985d. 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/USL4Q2236061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602869773f6208ca09f8185cb9c6fca7df53f2369041e1458e465f57d1482f41. 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/USCGH2271835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4722bc4b400dde69fd13a691e31c85ce94232d3199b926741cbb343221aa716b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USCGH2271836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33207f268c9a89f8a24be2868dcabf2b748e8251d4b53df70ec07bf20cd753f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4R2110576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6429b9d9e42e304e18eb047a00deaf760d8ef2cdbd58a6fbf2cdffc0ddfc53e. 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/USL4R2110577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30cc7559a354081886488256cf9d2d8e231e71046c7658cf33be69e6cf27d0e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USL4R2110578.
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 0x9ee5bbf05bd48839cce23b05ff1928d5ee7ac511efd18a3b16dcc67c98f6e66c. 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/QZTAW2434637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a3ca7abdfcbb5c7acb5f24af72e4ec670d5e7c608ce4c607dda2e993c5ac71. 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/USCGH2489990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae676977f9245e03605beae1df31d97a051d7b90b7ba2b5c3c81ee945c037ff. 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/USCGH2489992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bed38791fe28f3dff053592012322547e18a3d752af8eefc7411fbe139513b6. 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/USCGH2489993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a3c644ddeacdec9e6e200521713ec385e240a5d0787d2b8eca56a952a9a47. 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/USCGH2489994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded7d10dd277dbb18ce7bc7a0579b2ed3ff20466b40a20131a591349919e75c. 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/USCGH2489995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce10b6075afac0da852d8ae555bb45e2e5861640df5f98abc0fa4f224d64d4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGH2489991.