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 0x208890414d41eceaa5603d6d1dc130cf29e0ea9b603306d99de676a861d86e79. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86084839-7897-49e6-857b-4d24d75c29b3.json and https://artists.proofprofile.net/proofs/artist/86084839-7897-49e6-857b-4d24d75c29b3.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 0x4617f04ba9e1d1f8fd2538c28c70b5f3ea1e1ceb2044322febfeddd00be788b4. 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/QZFZ22547754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd208ba35968a6120b1210a9ab4a1ef1094093a5c43f790d46dfbdb1434af6. 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/QZFZ62520453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e793c18883777d683cc3e1b48a494defb0b9d1cd95fd60ed4048ab4b5d08b. 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/QZDA72561334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee469dd2dfb59abaf6acdad86f7306fdf5e2b45354932e6c91f4fe8ca3fedb91. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN42580626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25451fb73b9df6e679ad9739281c672e6c65aab8a9528584ce8ba6bbf6f8b3c5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN72554400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1b4632676caa44cf4a0cca53f9ca91e362c4656068162daa773b062b823b25. 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/QZHNC2599034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500844018a4affff9269745684a369abd93a897ff91b49d6a164eab2c90f905. 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/QZK6N2592865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb38511f6a0e9c0106da94594a15bbd2b739b4afa1e6a4c329c94b1cd2ec6d0e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6K2562041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee659bdd9226feb24bc9498c89e86a3c87d8106fafd0c701c92d4a34c00c923. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:40Z), 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/QZK6G2553632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36793ed310fd9211084e7aeb4ae20b68e7e40542442d8cc6cf42681a1f6c9034. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEN2522737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501a655d0f76d2166218f3b13be9125c6cb75096e96466c24e05c613b4cf33cf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWY2529686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261fe6565c940ecd45c31fc82f4595e4ded274a4bbed12ba1f0858ecdc60d2d2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAW2519227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7523a037dbc3fc2fed9ead44d742b44fdf476c7c8b06848b1bae3e968054bb9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2549384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65139ff939420fa051dafd5e253ecb6f3dade7da7394ae4a6f2a39f1b2244938. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:48:13Z), 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/QZTB42590785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde40eae93b4e0ca81bf6f64390ab9e0817f36191757b49289d12d6a73d3dccaf. 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/QZTBA2593426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f0bb29f3dce24e0bed12131b17bc18ef48ebf0fa30cccfec97e3d49fd89ef. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:30:39Z), 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/QT6EA2569247.