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 0xfca978efbf1e2827c9bdd563e7bf0f97586b877aab761ba629ef6358510477c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/285596d1-a15d-4dce-aa56-f356ec31794c.json and https://artists.proofprofile.net/proofs/artist/285596d1-a15d-4dce-aa56-f356ec31794c.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 0x15acf0766795ed0d463d3f72cb39379301e5b71817c7ad9f6dc61f717e025516. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NZHM12000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc716e7582719321fdb3ee08610c40f284c25b95a5eb2ce3e8e89246673d65. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:33Z), 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/QZNWR2141082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c70e0ac946421f5191c48419742c6450d3c5db1acc884622f49fe9118888124. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDA52255704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f50c351991c99e928a9e4eb9bde89b84a1e0d13033d8649dfa5ab8d53b3d00. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6F2219737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272946fc0da7e0a6513cf8ed61cc741f2627b925ffd5caa417718b1fb0e7317c. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/QZTAU2272522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aed1014ec511e68d1ed16c45dc9ce8a46c28c2e086f7520bf29f96ee54c51a. 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/QZFZ62374546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a693465972ebd5df8549861518ad8afbd3c67e8038affd7d1c15e0973c3da38. 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/QZHNB2364987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9bea706e510d5b7f8d2bfd91947e9b90bc7a9ae8ee14b3918e5fad196ba2e8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:27Z), 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/QZK6L2309942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585855abd04824c90c0a22ac3b11a0afb1a21a460112e95359737f78dad607f2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6L2309948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c3740ea04cf9fb66d8af56d6ef5f84fe2fff3e1f7ba308743f5ccaeb648ebf. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6L2309954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8388b408e2e25066cbe206d6f34d22aca6c578469c2ce119f8050bbaf003f4b8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:08Z), 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/QZWFM2352067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef03366afb4af0c5d96c4f501ed2555182f2618fe18678b80cf5dfb752b0d92. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52453233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977eaa515aeb4276d8bfebb17b92eac60c261bebb5780c6c4844c2bafce5d545. 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/NZPB12403268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbf0103ac82884c8d706fc530bf6b3db40938900fef9d556a027059cd7ff05e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NZPB12501653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83871ae60d3d14537dd4ce17044ada72b3bcc65f88d9ca13bc50f34c2c4155be. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:28Z), 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/NZPB12500660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55074b626c7af3a78aec4463eac3dc19af69567ec315089e7c5dd554e761439d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NZPB12501928.