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 0x5e0eaef7eaadf4e064da38a4fd057566e6976a8968c7031a91f650200e136aa2. 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/7ded3973-d5e9-4ffc-b5d6-aa909c7b820c.json and https://artists.proofprofile.net/proofs/artist/7ded3973-d5e9-4ffc-b5d6-aa909c7b820c.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 0x31a62370fbb5c107a2676f76fb11cfa6fccf59ffc42d6ddc75e8d02889561d27. 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/QZTB82501719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc30d35a472df31cbe5f32806254471a7c783b6005c094e97aafbfc97178d030. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB92529571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd127de509a1174819778a59f369eb109297fce988afaa7b87d1fd1f71480912f. 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/QZTB92529572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6ec715fe017670f12d25be5e4f6f9bdf3a2e4b765aae92cb40d6f111cf658. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB92529573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb89a67cfe1392acb35caac5caef221032f345186f800cb87944246b5a9ddfb. 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/QZTB92529574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1360b3cee4679b47bcb190e9c4239af742981577e876eda0fbfacc669e4eebc. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:39:47Z), 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/QZTB92529575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf5f5e948f8643d1b017e2b5798fb309480eb717158fafcbea9737debd4cd3d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB92529576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8dc36b500f2df4b7830f7cd07602681462161497ad6d819d122f9aba98cb9a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB92529577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c2d2ffaf26008668343b8141d149d09413ce1af184f3c5a7826ee6baacb883. 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/QZTB92529578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1432560ad6d23effe928bb21a5bed9d03159b27263bcaa18f48da5d4aee1d9d. 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/QZTB92529579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fae467fd9cfa7d8dc548f7581ac4f9a7b03badf05f7c3c1c95ffe7edac59b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB92529580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8d523e52fa8ae13f4703236f685588efd7cfc246e1ddf668abc0b97a826d9d. 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/QZTB92529581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4065b591d355bf174a0607be58ef9d2d587c6e5b5a7f14c0cfe93612b182d5f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB92529582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e55ded2561eaf9d9dd906aa8fb610ab85b1808498500171ededbc5389f998da. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB92529583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f41c8b04bdb6b127a9096a622bd19b1a1582f9c071f10302fe7ae529db69d3. 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/QZTBA2568078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6884160119231dfecdb3fc7bbfbe790bcd51f30901c4a3990249470260047f21. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBA2568079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1f655429c33628102d213e89b95f6afed13865cbfff718426430a41f90ce4. 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/QZTBA2568080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b1473cd2c776ae33a70a93528c98a6c88185da3631518b59b2f0053b5ecb70. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBA2568081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00cc0ff40afcba99eaa263cb1c0f8ac8283bb13e1a17668c25d99f7c50166f. 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/QZTBA2568082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f677ab8d7e6d0e2f5179e25be8068edb6145aabe1a2b91e1cdf10a64d1409. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:09Z), 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/QZTBA2568083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb7af8e5195d32bb84f67a15260897604ea8ea3fecbc830f4ff61f29b1494bc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBA2568084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d210f1a057800edc64e046fcf7af26b54e90e6a9be9f1f2f0b814ecfc0362. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBA2568085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c682c44dbcc1274461ffd049249baf817dacca7004737cd1347ce5a4e11e21. 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/QZTBA2568086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a1dc264d0553f1b23ffeab6bac2991871b8ba65367047657c9fe4ad8d9493. 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/QZTBA2568087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e1714ab1369a12a5008590a2ac96f11e59d2707cec31a50d821e5802a794da. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTBA2568088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a64ddf4156287f57610a5bcf1bebe26450299cf9e278a6c79a201adbbf5400. 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/QZTBA2568089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22089212a489754409a694b9f10064a7b8ee1bbd592c4807de9dfc6e570a6ec9. 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/QZTBA2568090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b18781905e74a439fc3eab8d1d360ba661936f4a2c327a935df22d6062ea22. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBA2568091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f06d04db0f869069374c87dfeeb65537a3df8bd0a01916931a41da18031f5d4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBA2568092.