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 0x4167bea6eeb09ffe6bc9880f26017dff3a628c7892e84b92c031fe51cf06dd43. 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/59c3b179-1ec7-4599-87fe-5e24ddaacf50.json and https://artists.proofprofile.net/proofs/artist/59c3b179-1ec7-4599-87fe-5e24ddaacf50.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 0x889b8c06f24bcaf9277adc427375bc5308be95ff8fb18e7c9849a42f816c3a28. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLCK41400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332d11e270ac216f2dca9e3f432fe0ac854ff0efab563efb06791410f24db2a. 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/NLCK41400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e41ce0eb5a2277d21f317aa8c48676c50e3afa3570285dbc01d4e9e845e2ee5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLCK41400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2c26559271d172bcd767d53461bb4e93679b9c3cfa812ebc7b2f0992a988f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GBLV61634777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dba52cc1ee2ea7ab2385d247258097c18cac95502c921233220bf3476be7b3. 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/GBKQU1700578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074396e268741f0226031a3fca7027c7dcf1a825878f0b1c4191adb8b6903f9. 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/GBKQU1700581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0631bf29710d39c702305caf3bf069facc9122c4d02c3fa8f6485988fa3a2bb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBKQU1826405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f70d30e1e2a51b2c859513554c07073778434684eddf3d74416f48727d313. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBKQU1826406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f12ebba0df74e165b610561af515344ab8b277ad67249795c334405bb9fdf50. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR1808755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb17ac343abbc24b4fe3ece36a4d1be41915043b617ae32e6eea1f7d6e33ffe1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKACT1913714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87218c41c66406ccd0891a5dbedbe1a7cabbb9bd069dac051506974b2b6e4f9a. 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/UKACT1913715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104dd359a658e8c74214afbe65988ebf2c2641b13a1bfea60a6df984a0e101e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITB842000552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30fe89a021f58af5d1b628fc36b31dd624c6d2467e5b7a209febe929a699419. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITB842000553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb2b78839282bf1e7c9d106b5e1a3e6aac82c152a5390960e08dac5f0d83051. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/IEHDF2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3233ac25dbb4996f8f26223525e258c679a1f3cead4c94a808e64a9f046f1cd3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/IEHDF2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a43ce71af5023d7be73f70949389d84aab834462b0544131ce1c73cd26b2e1. 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/UKR6V2076215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ba5f55b402ec8815c89681435fc8c96ec3954727216e159e2d208a00b73d9b. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/UKR6V2076216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b04745a4fef59a6259cba9b2d16e80f736dcd005d539386fc363d9bee07d2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEUD42016256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6527d6015ce985fe7a36f37c9bb61220f0d4e70f309e0a474487cb745149b809. 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/GBKQU2179287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7ed30ad150e8d6cadbcf306ac72f548be4b43002a1ee2d59ee55dbecccc3f2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/UKU932144658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de57ea9dd8c2334d1181fcb6584b28f6efac09b8d9e6bbc67f7af5fbc66242. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CA5KR0030634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f035f764b81075c4dc29a5faaa2a332375bb1609620052e0d60840774a1f3e7. 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/CA5KR0030635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f0411ccad06c9b0f384fc90019322634826a77b83a229ac4837412c7a76e2. 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/UKU932246365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957f1fd44461023cb9629bb6c6e6300bf5f37084e6ad2e30d2d403e754d91bb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UKU932249246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a850e3d38f61495d3de5666ee30bda0e0ece22338c6b2812df5736314f401b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/UKU932252144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c121d508261ed24bf18d3cae22f7cd13e051a45b3200f99a43672331ee9f601. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKU932257146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3212c8ed9070343a628e933c01ddd1d38855d30f7ac8b488a5567067b3e8356. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBJX32266840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f0411ccad06c9b0f384fc90019322634826a77b83a229ac4837412c7a76e2. 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/UKU932246365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1a56a216ec33413f75bd2c8879db45bad5254b44bde3925e1b0f0c51023cb. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/UKU932246367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957f1fd44461023cb9629bb6c6e6300bf5f37084e6ad2e30d2d403e754d91bb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKU932249246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c121d508261ed24bf18d3cae22f7cd13e051a45b3200f99a43672331ee9f601. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKU932257146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4409c8ed8b974072ae215ab13f19301cd0777421cd57aece8954e1a6f075ee97. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKR6V2240357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9245c8bf2c0cb6db3571ef9249e779d98f25176ec46c2d121ba88722728057. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLRD52257478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5142c4bbfc12314b2eaf8369c22823f5e368daeda4bdcf2df94fb7f5561d72. 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/NLRD52257479.