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 0xfd6902ac8666e2b6deeca1d7d4b04776362904883ed608282241633d29c2a6b1. 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/82e59f18-bc7a-4add-b1cb-a8ade844c528.json and https://artists.proofprofile.net/proofs/artist/82e59f18-bc7a-4add-b1cb-a8ade844c528.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 0x31043bb3760defdcacdbd0135a441fe399ae6251cfba6d2087e8fdfbc0260724. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6G2582240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d131cd56783689b8ec920a81a07e1af1cee26b99a63bdb9dbb367c7e92336e0. 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/MXA3V2431238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3191e0e011e51d7bb9989da4c020d97684504ec36a8d5b909bfb3469fc3c35. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/MXA3V2431239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdaa32f527be8524267a0d40ee858921b2f4c3d42746bd343c7e21c8f09e282. 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/MXA3V2431240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce9b9ca7346f081ac3a6c3282f1860ed33f0832a6672e0efe7357182966b53f. 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/MXA3V2431241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ca79b63e58e9db9b59359b30d9c6a81af7ee4579568033403a086b206df35. 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/MXA3V2433717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab7180a460cd4decf5956fecbe913c41f987c0de2de05148e587ebeb9b935ad. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/MXA3V2433718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97984d6eb029b8b0c6dae61384f5c8b044d2c4837d5f5e357d6f6f230121c61c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MXA3V2433719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0198bb2f7012b761c98528a4e9a041e8e3768a21ad3541a35580619214b100b6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/MXA3V2433720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db10bd29ec6a3347171f36d51430641a8952f38b266dbbf8994cb0731470cfb. 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/SGW502502877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a74e74c64812dd3ed5456e3a41b00196568d77d6ba46b435a71d8a831d958ab. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SGW502507367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4a68436ee23c3ed4f45e9be26d1f1dcbe2d52ea33b1bde6d44a47c82fa5433. 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/QZWDW2564323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8290cec0e0b1531816687796e73feef20f57f07904407a0709818c7dda53bc2c. 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/DE1ET2383656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5066f2db85aab400a84eb0f438dcc8c15fcc0e481fdc62c50fc63ca9609cf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GXBAV2123334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2002254ac59d76275bc3c2e7ff873a773c9210c626cf79f88eb7a37fdd8c2453. 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/GXBAV2195023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f3d8e71fe217f03cf9b5ee55d537cf5905919bc4f09137fdfb76a189d2434. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GXBAV2111881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf56c081fc6fcbefd41dcff72da57d8a496b9d946c9c95914d2d1f1c3688b2. 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/GXBAV2104192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ba1144ca5a2eedb652f1322286018814c9c7a256c9a6642dc24e16e69baf0. 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/GXBAV2136164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf82bc2364cfe34789ff221feef9919c12e5abf6831ce238c1b856152d77f28. 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/GXBAV2122957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b790c70adadfb55c6b7e56d4cea65fb63ce2258b674b6e8e0c4117298c91937. 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/USUYG1743449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8260b02ab79fc6f4da3269bd5822e807fd4b91c8e8c03ce940318be8cd4548a5. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USUYG1743454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcfc0cd33077f27f1967e5302bc83b19b8e6d1a837ce6fd4ab7da7c4f6fce55. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CA5KR2543828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ef7cb0add2f377553890afef9373b4a12a5cd3676c66a431d203580ecbd029. 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/US3DF2599548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e4e082222963a6c9d2d312e9a623eb324b337af8e0021bdeb0fc9afcd38a5. 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/AEA3A2076635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f641d6f92e7dd5d0d04c233bd5957deb8bec2503e3721cc427dd7ca5e8ad79. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT5M22520520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67810f99407a832e59ba4376b855f339636b339797094bdb1b8b58b59d452d89. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFME2541815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c055d25e43305c9dc68ac7272e1cfc71db52d8e08934e4c7315309bca256dd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMFME2541817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8583b55be59c01a2da55f027a1ead9df90096d2071389d505dd3f96eb0c2f99a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMFME2541816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac5778e5d4c599e9b14eea82b3ed6abb3671dd0aa99057560aebdf187efc7ff. 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/QMFME2541818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6723142fb5e251f195b4dfbc76db39475851c5b094074335ff0127a0c65a1ea2. 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/QT5M42559863.