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 0x203d2bd2e2c32ec9e2ba9df53df3eaa3469461469601a17eb10cd90ba6977c4b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcb90d97-32f5-43a7-a7ad-0039daf3e7ab.json and https://artists.proofprofile.net/proofs/artist/fcb90d97-32f5-43a7-a7ad-0039daf3e7ab.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 0x22cb5346c195a334efe23de58df0e83cc384b228a6dc7aa8af2a1e2bfd88c9cb. 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/QZMHK2366332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e172d070b7115f35675fe0ac92399227988974988582d0390f1a3f3c8de97. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLCK41061930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b06e824a25dbec4c8f67f78f592f98bd6c40677fb3655c9d4418cd53309a8d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLCK41061931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52304c56ea92ff9720602a19f059ae6a72bb2456e5757f6a168c8bb5392fa724. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLCK41061932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b34169cdec522ce2bf711b9f803e736236b9d41da059d9babb29a2b4498df2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLCK41061936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29070159475d335dee3cc77eda0e58758d67e5ade7d8b3cd00d3e5bf853c5a5. 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/NLCK41061942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d89130d19da96a27cfe88d3e723ed4cb0c01cbc57e72728d3223290bb1da4c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NLCK41061943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229cb04bb8b8c6620361ff72514c47db1c187a9b00e679a6eeaeb890fc345026. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLCK41061945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af384714a55df4367ee2763ad5179ba66cfcd5206cc87fea016b55dd69c938. 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/NLCK41065258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3653b5c09cac6f4aae5d6a8b921c600e6ccd394d673402d381d2ce641d77dda. 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/NLCK41065262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda22e3119aa5ad0c63c6d378cd8ee704e356827f820530fa2517862ba2d54e2d. 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/NLCK42421787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de83fc7a61c7b8433e611a2b0fe205c39dfd98e68849c9bd0e6de45be4b3c73. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W12444274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f15dd8dd41eaaf4bcfb95f5fa72c92f1202e572542a99c7e55313d1cb5dd7a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR9W12444276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986c8cdc0ce6fd7a53eaf22be4117afa8ba887cbd6b8fe706dbf1eb8986e622b. 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/QM8DG2430118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a698c284a84545a6edfa40559fdf5cc82e640d356d79f824b4b6ff76011bb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM8DG2430127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a4ce0d316351469ca7be6c46b19e091ce148acc44052687a89e0614a229f26. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZFP52417070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b792eb88cc70edc03a06fe96fb09bbed9bc3502bfd06af229b7155e0928a1dd. 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/FR9W12108959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55096e207e70b835b4cc76159d21110710e14ca632cd09b16930c6dbc2eca96. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR9W12108960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19790837247db6d269f3557c2fb3a24d9ed0b90d0a130117f9dc2942c9e771c1. 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/FR9W12108961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc9c27c1dbc908104059e778d19f0f53d2ebc3a91f730a34ce30cd4a2dcf61. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6M2276536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf85fc096bcdffd2174365de365ee8078987645f34345a7e45ba39c88b0b188. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W11929066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb6fc1064fb7978e75c7957f335a254a80f27001ea9bf93df74baeecef7c078. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR9W11929067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ad7641021df7b0301603b5f69ef1edc183b936db4da37c477cccbc3de56c7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USA2P2476103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217ebe2c18000c10988257b2f12dad6d0d25f76039231c3b6a72b33dfa8d0373. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA2P2476104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f1f494f210603c1b8d4d0b102edd66728e573f3314fa5eb88f69ec58d984a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA2P2476105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d4d29e6bdd71add38c305544d124306b5c80713944136f84e4d2c044a1986. 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/USA2P2476106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60db56d6a187549655f3a148b25e00231ea058ac17b496fa57797a6177ea4c73. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USA2P2476107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48aa8a029efc8988f867627ea7e5b3554d94d7f580c9597aec0ec04a81cbaf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P2476108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7069437ed42c6b85a53d9ece18de41b4a425d2925f218c04bdb40170a8af27e7. 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/USA2P2476109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed98f7a84157130806fdb1d1a99bc0cac712dff3d368053f5c4a20427834c3a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2P2476110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0160899bd08a5393fd8c491c18548969c8e335e1a359ef3e407269647bb1ce7d. 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/USA2P2476111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2532fce19ef845d30ff15600ee694dc00b318dc24528a4bac568d6d40873baf. 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/USA2P2476112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22c57f836f76dc6214ab9d467c9870c2df9d4ea4f1cae2ea3aa53731316c43. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USA2P2476113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538da40c8e29863daa3d2f795f45e58666caf3b8ca50bd0ce2472ae0e919491. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2P2476114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dae416320fb12f872eb8a8074d6462a89f8e18b046f91407667c1d8ef9c8e7. 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/USA2P2476115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94558563be2c2726d023543d40b2c3e0e8256f65d3b96e2501eaa948a2dadf17. 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/NLCK42341444.
Household Freedom - ILLNURSE End Of The Curse Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e5e05e3742ebec53e4c88e6c03e211fefa7e0e7974be9f8ee5e711639c255. 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/UKDRT2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f558ef449cc57da5c90d82023b394f7e5106d33039363e9b83d3590e2501cfc. 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/QZHN72261027.
All Buttons In (Inc. Makornik and ZNZL Remix)