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 0x3facf1466f2984d49eeca953e2fd53b836e50b13077712fa32fd40c0b05f887f. 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/37d0fe40-bc95-4257-98a2-8b48c89bdfd2.json and https://artists.proofprofile.net/proofs/artist/37d0fe40-bc95-4257-98a2-8b48c89bdfd2.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 0xe0bebc5d7dfe26bd0668c82a80cd4464e10e144c7ea3f25a0fc19e4ad6bb0507. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMPU51273841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18edc9ff80b7ff69c73c66993a460cc44d9eeaf50472f0e5151240ec9384a47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMPU51634483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26db45e589f04acb277e3f64187b8e9d58032bbcb66e6bffca9fa7a7154b06. 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/QMPU51634491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b250dbacbc39e5671f31c06bb5c38864afdec5a3688a0e3fded0e3b5b141e. 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/QMPU51634489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14b7caa5c26469279f6f57e14c3ff7bd44a24fc69e505209cec37acf9f9073. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMPU51634495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaceb3cb3accb2928c46c4dd259fd5438439bda429f3a5d77b0cd329eb4a8137. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:53Z), 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/QMPU51634485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb95e39d54dd2b423e4733cbbdc60e562a458076a30a8abd4d4f609f414f85a. 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/QMPU51630651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b7768998d84da8ad8ba85d9dde00e02995192447441c56fe0b21f694b5049. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:00Z), 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/USCGJ2009084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879eca1375c7c6e2ac9db0d1d9cab41a54ad726db09995ae505ef8859a652d41. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USHM92073830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30290404cc17b5de378cc1accb38a3dbd64f67c6ede06e61655886ea05fe569f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:45Z), 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/USHM92073832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ced14daacd28b17b8a5d4c1331af25dbcf56eb633d7722bfc5f00e681a8aa0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM92073834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5398f82f9d6335425cc06e4c7ff8a45144603bdd2c9e039b0fa732ab8f3cad59. 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/BYA0M2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a14c90c8de97b0f6ef90d9c62f84f7ffd166275e8d525078578f7ce4e7520. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/BYA0M2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4327df52fe502670b0b5d0a8eae4de874e31517df0ab18e7c0ebcbdd42c06d6. 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/BYA0M2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf40e06b27e930083dd97bc5e64285d5650ffb5f7db0ad430b756834512bc7. 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/SMRUS0074454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba2339848caed13ee2b42573e203377d79a2702be3a82b9e53efdf021aef4e. 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/SMRUS0074459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d5642294b217e5097af318f8a388961e3b9dc5e8da712b720e08042c67ea7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:49Z), 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/RUA1D2591881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9ae316e0ee9ab30934cb666fcf075090ffbf716e7786955b2240c3102554a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUUM71901033.