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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18bf2beea68ffb0131c5a7385152c407c178236b0b82751f73b1e2ad9f9666a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16c0cf8d-ec7f-4194-ba49-9f0c4200eb98.json and https://artists.proofprofile.net/proofs/artist/16c0cf8d-ec7f-4194-ba49-9f0c4200eb98.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551eb28fb14def79f8c87efb49c29b9aec3348d25274c0836c2b5fd324616529. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBYMS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348c036186ae493ba4b70d7fb58c8fdaac1bd097e68ad244e6af6621aca18b1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBYMS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe58c8c3d367703f0b8de935216c7ed211ae34e90f631f7678bacc0722013c2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBKQU2416955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb112be96aabf45fb8b50ba30aba62db5b82c3995b60be4995d1d03c288d4a75b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2416957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc2f157586745e609dd4e88caada2f485ed36fccb0a887f0507a698ec28843. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2404722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564455d1ead27f85a46570f746a4be47868e3b784a77396538a89a226c258302. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2404723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e3d00d03ea18e0cd1a37aa02869e5b053022461f26c9a084aff5da9025a9f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2471262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a0178cf5ca0ebb4dd16a09dc9cbe821d1da7afec4cf5ffd52164dd550b6970. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2403634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4fbb9c8abfc0ae1cbdbe0559e8429788fa41ebdd730885a84559ce31db8e5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GB8KE2403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae789fc52299608ae92569c31d1f275e9543966dc771c2c06e14d677cac98fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2403636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd7e4f7e77cd3d695e9b793ae5494017c19b93c416ebc3e2316808809fb7c2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2403637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60a293e7830fb5da44e5f6cc36fa1aba8aad468cef495ccc60fd777129cdc1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU2395352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3bf3c640baf71ae76345ac78f06bdbbe3399e696b4245fc0234ab2ef2e925. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2395355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eef5ffdfb7fcf91641ec80e010644ab396cb3e4fdeeb4d87a08198eb0d5d7b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2201595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e13d61a90528459a3c991b3a5102ce8d742a404c03a1b84c859a25fea17647. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLV62132725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc45af574f44b3d015676a28ccfadc252c87dad493aec1e52d61a0bb0291dd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b1fc11641587ba184dc2a162f28a4fa1f89d901b536dc800770926088415b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB8KE2151766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8c80970e0e1d49cb734fe2f441d4fca51a5d70343f5b0d34d339f0cb655c44. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GB8KE2151767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd2e8dd2b15d3b9d46f5afc90384a5ee6083c8dc5be03e45af14c83f129c3cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK2053083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce8a79d5ccb65897e3d28002aff34b8b321106977a14159262dfd71e11f444a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKBP51500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e62411cc27268119466e86f57b1acaaf71dab267efbc763ae846a5ac247a5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKBP51500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a828c4e28b029574081b1016f2fe5e5389217c68f76c7ae793460540451b6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKBP51500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48bc5d28d9ae967846fbf7a57da8e67851de106d4f339e5933f9c569a37b19. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2053300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ae7a329c13220cf22dbb0fcc87e210d0c52c96e51188a2f252523c9b3f8f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB8KE2053301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b0bbcf1a5910c8b69833d6d19e54d84a7700611ca91ba6f8a60afd23aa9e6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2053302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202608d2b831f15abc38c381c7a87b24686940b11487797a9d6b368a889b3316. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLCK41056512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce09116f7313d2f2ff73b1a8753ab7afa4b52f0123c80fe775d91beecf7a8d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKCAH1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56498dbaf0665c1d7bb2794243bcc86c41ffa2c294b833194f1fd1bdffca9ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1878089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f887ac1a3c34017242f0db7e911d37e061f5a1b820072de892a239ca8cfc4b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLFP1857616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db71501bd802605e4fa71cfc289ac4e9f15325bfa897df1014002506508c8f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2576074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21bfdaf14801c7bd7ee8c7ecf83b7d2f455aff67d2462f92c2123bf0dc1627. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62409609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97deeba3e7b5090642cf11cf1f3201e511d822963098a2d210a3b0ef80c42fa1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB8KE2427043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df0841663a1791ee809657fafe1abfff76bfd3869b5db7e46207368887eabf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62400897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f439a1a0961c9fb7564af674f4a0502dfb5a4a2f350180f43bdca31c5ad7ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62400899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5812c4a7de5d5220db5a383e6db87c0971d4dec7d723947149680c56ccd62488. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBLV62400900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d9622f6728403b6bf5b4b174629d9fb86792e5dffc06f97b41afce6ed467cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US3CS0900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ce73a303d7b0edb4c4b0fedf89c160710809fc02c98ca9c93a9d16748a0cf0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3CS0900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dc3e632c7d1c3fbc2d3ea34bab6bb3ed8a95478dd35b187857c086f184ce93. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3CS0900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7db12cce3f9bd5e7818efc47c706a2d1fce6e2a0d014bfa13fc62bf5736bd3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3CS0900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b4fd3ffde4d6e17e012451e4d1b76f91a725bcaee8df36d5767900df92eb45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2495652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea778818a7c724552b4b42952ae4b785b6596b574ff02ca4e51bc3473539c509. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWDE2495654.