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 0xba0ff7dd31a745d7dbfdd1c9af385b4e617764456a469c6f451f6fd0b74b15d7. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/056634a3-5814-4a03-904a-d180593e0165.json and https://artists.proofprofile.net/proofs/artist/056634a3-5814-4a03-904a-d180593e0165.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 0x89426934f05e1b04e16f795ca20dc5e39d778317e496ad7227a503b349343389. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR6YG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8007ce90f7baec4538da3c875af10603d379c95425337fc05737c6fdbf93018. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BR6YG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa3a9b2cbe859444218d193cc4118920f99822ad0cbc5f2d13dd50b43324e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR6YG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031a3c6a83748699f2b06a694294d720f965b8a7771f68edb38a6d5c39a5df4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR6YG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ed34daf5a57fbec17fe809615bc06f2b3ef7517e13618e00039de0a3475cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR6YG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd4b958809a040e08d2b3076091072b3ce40e56d593a343828595fbcd83069. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR6YG2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0b745ed2cf8dc43e32a0609d80a0ac2db726454e9fb36ad435f499a601863. 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/BR6YG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477d15f42334f71f8c1f8bf2ae89d5b7d8789f77294d3c5e8fcbe77fe071bbb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR6YG2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848894fe41e70fc1b26cee6081f57fcef8e3a50857d8bf42b7681c39fb97aa00. 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/BR6YG2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860f881ec620802a5624f4bce21e741f05307a7a193759fdade09e3410fe471. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BR6YG2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52de7a1eb56fc64e50493a0366a6a3d29b4053b213427eff298f9e6a4255f71. 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/BR6YG2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52da583a3e679e22049b6b296b7994de23ba60547b38d42f20a689a528fd1c94. 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/BR6YG2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2787329d26ad0fc764d98c23bd62d5f316f4c6d9389442043555b4df7a60b8c0. 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/BR6YG2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f93b5d2b5d8a1ee968d3af18a827fdf66ef2a9d8b00ed82ec12e43828e053b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR6YG2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9669231f1b63bb3a1d22b23a768a0dc11ccce1d92486ed8d556f45e7295afd3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BR6YG2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70626ecaa4295c3dca2038a6a0c9f22916a100518bdd624d2e31f66957160d. 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/BR6YG2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a20a8076197c123a7927db5dac9b59d7af5ab4c34782945fbbe53b1d697619. 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/BR6YG2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333ff1d667792aa19944fd84535f0535f6bfcad434d42dec55551d4a752b2b0. 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/BR6YG2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cfd8260da5f8e7bbd83fb9725418db3333a6a811b220bb2666b3ac909364bc. 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/BR6YG2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55d225945ff4dbffe69eb805c6eb36d5ee0277b580d19585437a35819b24f90. 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/BR6YG2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017dc266ab6aebf4723f7d961ec9427471ea92f9d0a03514cb8eb5de32e70d25. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR6YG2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43cfdcf1eb13bf83076a3b2bf73c97da152cb2beedc795d5b52b64c1e11d3f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:10Z), 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/BR6YG2400002.
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 0x1b9ebe65ecea0be889b593ff3f8bd0ccfb68aecfc6913d070545780ac4c9e8d5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BR6YG2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec22fe69236b1525591e43c8e6643877d8cdc2bf9e1e3646f9cbdca4017c9d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR6YG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab581140e1ff8f1b88df9c41cc27c7acc9c6a3d8a6637a7a714d856f8dd745f0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR6YG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6986eb9f24d62d544590cab7dd5a99896ba865ddc2a117cc299445b3197f623a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BR6YG2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade85162966f769e3d96eb4cdc05433da3169897849a3cab4bb387227ad0c1d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BR6YG2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb99eff91dd2cd10d701c552a13b399245061d29e3b816b8fbf83aeb4c4dba. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BR6YG2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbad4b57fec631a2b9cbb33567eebec565b0892647c5cd9ae1d69267b75b1e8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BR6YG2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065355b845a85113830dc42ed2c564b043136d486c71e63de2676dc8d04dbbe8. 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/BR6YG2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc569b20a7e5ea9955b2295666ecfc295a82c3239823865d0c72ab6de1b7113d0. 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/BR6YG2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e696c3f7874b1aa3b0dde1ea5868c029ac51b26338d399f1f88edb27db7c5. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BR6YG2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b21c8c8a94a4358db4022aa56cf8400313b65994bcc72a55d11ae1d306ea2c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BR6YG2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a280e757037bc7e8a0ec0ca05fbba5f40a16372f691121ef23dec975f063bf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BR6YG2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e7b27d87d12e4beb232a45c5307e0dd4c3e81ba84d40840b6ac9f6c296a78. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BR6YG2400035.