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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 0xc7d55edcb01e19ee4c95ab42265107e7125b799110aba019b705f6603cb53a0e. 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/dfda814e-797f-42a8-9a30-9c147d44140f.json and https://artists.proofprofile.net/proofs/artist/dfda814e-797f-42a8-9a30-9c147d44140f.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 0xc2d94c82329aec1511cb929a247f261b20233f09368bde0d782c3987a396058b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DKQ4A1101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c104b8bb3a79008625c5f1ad583f17e99e8513a18e7e49de16337de1c091eea. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DKQ4A1101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852df4a44adc6b76c26119f2e09af8fd500aafffaa6df9d6cac92bb9b3b4f5c. 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/DKQ4A1101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e15ae034a0cc20b58a447c9b083a92e760e04e89735d40efa9ce1d7572a9d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DKQ4A1101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55f856f46428a9aa29a17984c11c52658c82c0df7ae454ef145e904b4a720c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DKQ4A1101205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2997679dd842a33fa6f629a85eb616ad3c4363136525523cc953d14681682696. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DKQ4A1101207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db012611357ce3d6fc4cdcdccb9b100c0ac8ad5a3dd84827034879af3b9bbe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DKQ4A1101209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1bd565665cdd948ef6df898012535c9a96a00e2bd2af5b42241644ddaf100b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FIUM70800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ba09d9e33a79b5a73fd925d4e88306e325db258b3c37a6ce8a1be403579c1. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FISFS0500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a27f58b3e046247b1ee58a5e57b642a72b3410f713435f75d47f66d21aad1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FIUM70800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8b73d7c8977317b7ef7a69b878c36a15fc78897ab65dd50899f30e6aa8f4c5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FIUM70800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88b9e161b00341812efb59b6bf6872944557dbbe7294365dd28ca446aa1917f. 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/FIUM70800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdb4bd771978689a117e51604836298286df5c0eeaea506e2184b7cbef38322. 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/FIUM70800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348bad780bac741d1d215b3512653978910d30ce3f2fc202248ca771224c300b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FIUM70800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88856169971277f00929979a473edd385a0908ff0c02c842eb263e6cc36719. 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/FIUM70800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ee831a7535b333b62fd02494602eddf1eae4b3ce6b54d0e0f70d7ee71e417. 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/FIUM70800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085fdb2ee392290504cfa86e2e88cb0e1aaaf630a15aff62787dddd9d80d35d0. 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/FIUM70800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62103d2654f707492f326b464d3df12e127b925d7d3c3be81e4bebc2837e7db. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FIUM71000735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a5b0160b423ac987c08e4663134dc6488d93da19335cdb3735113dafe1ee1a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FIUM71000753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc0b6aa3145a8114f741cb7a0fa05bc52b6db23557e21c3aadd99b5ff6f052e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FIUM71000736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4451702d65296ee5852e867b2b2f90d4cde1b462496a8bead8d018d4ecffb20a. 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/FIUM71000722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5aaf520b26b4762b69a4028b203032649c4b9fbdb629c82462ba86b6156533. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/FIUM71000737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8e908fb20db46e9ee77819001c1647e245c7e171107b495e2cfe711895e94. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIUM71000724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66932d53f3d03e9fe96b5673e305cc7ce64978f7eb24cd11ba2b420ca09ce029. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FIUM71000739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac6421fc3a619bb88f4f374e4aaceee8895200eaa3ff0935ba9c8c3f2a78194. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FIUM71000754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0797f4f76cfae571471c7fc09c53bd121b7026683093b14d77e2e0cf0240b37. 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/FIUM71000725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eabd15097b9ad23349e33b75b9da559f731ce0788ce96f58ff35da9c2b24d5d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FIUM71000726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0522a60f63aaeeef41904150e54ba3e12a422f0159bd373267a8b9332b7542. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FIUM71000757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788fe0ffa285b18d188c59fdda6a4f1753bde5ceb5120a273f2197287abfda51. 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/FIUM71000731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5240a4619e96951b504b099183aa1326cf7329ab0ae58401e710f5fa507fcd4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FIUM71001156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a85535d02af0ee5c382370e148ffdbb51bcbeb15c00dec96bd35a9fcbb6f7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FIUM71001159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb216b731b516c00db5ea48aa474d3ba834c97aedd314ac8770cb59de4ab3ee. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FIUM71001161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819e3b27fe782c14243aeb2e54798034af26a2fed1748c1366c8ed491f6963b. 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/FIUM71001170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bec6122f51a968e02e320479a445f61ce594b70a4749b2e145be48d1622c62. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FIUM71001171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3036e4fec9a94bd07d85e1d071ab92fba0386cc37cec9dfbe4d5d82eac4fae. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FIUM71100687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3938fee4d11ed9546b0e0654ff54f34d593edca1c1f57d7be4901f34f48502. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FIUM71100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10b705db571932753cfb9e7f9b15a338c385b2db13320104a8cb252ab04e9d2. 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/FIUM71100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f88c6de41c883f609a9840e73b5c17497841f117c476ec855170fca315d7fad. 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/FIUM71100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda315d474d1f61d1075dc3b3c2a7663513fdceadb9dcfaadb51a6eddf7c9a416. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FIUM71100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6495c499e07ce5f6bc5017be863466e51ed1eb8723ccbeeacf8df068e48d4f6e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FIUM71100697.