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 0x1a4aa24ed39975757a4ef8c0ffd1f3196b52495dfdba69642f20731137c0981c. 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/e948c89f-1284-4f38-b1db-d467f519ec9c.json and https://artists.proofprofile.net/proofs/artist/e948c89f-1284-4f38-b1db-d467f519ec9c.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 0x4fc334ec003015d8d131efe8b4123f075eae567fbe79b5af51813864184e0543. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZLL92396428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11be6ffebc1def4df580218802c69106be9319302b54de72a9cb61cbc5891acf. 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/QZNMX2312338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe1497959e6e85d45830d5d69cc23a5709893f5acd6208f3482e215bbfdb24e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNMX2312340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13ae0ba6a4dd7d3339fd62459e264bf97e89a1550166d0df537af33b1bc322. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNMX2312341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f938aa2ed79c022df7dfae4d7a4c798631ad1e0a712964edf1120ee8764d5. 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/QZNMX2312356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774db788e299bc645c234a7a6f77bbd399679f557384f0812f781be486556c55. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:53Z), 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/QZL382447437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc54758e6229be425fc2b0b84f7f332c6ac69dd241722cf3f4ffc0a5ce4071. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZL382447442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34c1c98ccb6dab2f05bda25b8cbb66e59ece87399b1f64406db0707799937f5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNMU2402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02ff40e283183bebba588726d8a68c900ae2950d71f9a10e0fe8992381fe673. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:50Z), 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/QZNMU2402276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1050e91dd71c4f7d640e497f76c21c1acaffa6d55bb08c2b8b369e1e73a1b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMU2402282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82180f7848b4221d8df68f361753d3fb5ba9b9dff4bffc2a43d149c64f749005. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNMY2467151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ce4ad7d075532dbd0ba7418201678c6f1b25bf85bf43d2f098e98f79e9d84. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZL382570134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be543a3896dbd37956cfc1fd95f471ac86cc12cfe8949608fe375609dc31a7e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:41:28Z), 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/QZL382570135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96955c262b4c837e8743cec806998dade624188ea11629fb37b466f8e504a3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZL382570137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28acd5bc27413fe8ac9af08ff92ac764ea4ca2eac84d0f654d0ef766e98507fb. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZL382570138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e71eaf55c538504d711cf9fbe3a878525209fe17cc3e0bcef7e7d3346df92. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZL382570139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33f7a4ec478e89d606cf9760d60afbed35cd588b019c5c4e62d8622adfa9c3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZL382570140.