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 0x2929413328f44280e6a82ed18d762ed28cf92dce1d5717710adfa635ea2e4f90. 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/bcf2eb90-24ff-4111-b0be-48e1eb30ab30.json and https://artists.proofprofile.net/proofs/artist/bcf2eb90-24ff-4111-b0be-48e1eb30ab30.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 0x5110756ba4fe1bc7be9b2c40b66aecf38030358f9a2c3462d3dfe58768a7e4ea. 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/QZFZ61951133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9916eaeeaf522d22cffbfce0e8feed464ea8582ce384165b4e6ea0051f33e7. 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/QZK6Q1993638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cadd6b8408fbbdccb7ee6637a21464b1fb4db3a7034bd956d9263f78eab75b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6Q1993639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7479558d4bc2f7468102276002367fd0d04969bf187f18d3514e6f086a9ee1b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6Q1993640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc9f5b7affe148c5f3eb207085cc5f6b038130719ff60182571e6120bae0b59. 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/QZK6Q1993641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7231845ae77b8fe5a4df2570b489f9988fef0988c0dc1a291b7b129250143f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6Q1993642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4b5ba5d45d86c01575bcf63df6aededa71fcf3460f25edddcf7d533e8471f8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:28Z), 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/QZK6Q1993644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de57aaed1839def04581670c3d740c1309cd8a70b4469c4bed7fa3caec4ac1f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:27:51Z), 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/QZK6Q1993646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b38a66390236146b75ecd4a306374275723e73a93273f1f2e2efc7a027253ad. 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/QZK6Q1993651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab10e6b8fde6a68a59836f98e7b30734afe4bd6e9a0f7c1d3b198450706a1a2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA62275589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914aa251f0a5eb6987230b92427015f621c3d3042c595eeeb649304d03b63a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA62275598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037a9882744e014c8b8e6ee555df4d6bd387798e21e837c9a71200ba0747010. 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/QZNWT2218144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f073b7a9aa522dc6225fceff8e102973f88b986de0a7a175c05fbc95a3fcc2. 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/QZK6M2497564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf95b8277917f361a88b098cc948b4e3ee0ce3aaa1f3b51858d0d4bba8780ab8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:04:31Z), 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/QZTAX2316177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297a9e23b9632705b5b800252721e0ed3ba9bf1c7e16dae9af584a887555cc0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:20Z), 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/QZK6M2497565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce68b63269e9a43528df2467021edbfdc0929f465f38f6ccb6b2cecae6989a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZDA62424637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f47f7f6cb4b998a72ac67e25fd5bd070e092329b1311b2acda526ffbf8928b9. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:40Z), 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/QZK6M2497567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76371ec90fca575bf8ec4525bb39f081d84a93bf5fd2f69594558bd17324cb9a. 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/QZK6M2497568.