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 0xdddb6917f8879aac83f82add0d87e0d0a1f68ce607c4007e02e63eb6d17a0d71. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c295033-f7f4-4205-93ad-4c2effe6cbae.json and https://artists.proofprofile.net/proofs/artist/9c295033-f7f4-4205-93ad-4c2effe6cbae.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 0xdefff51d653d685bc419c364207f389513ed0824b65a9cbccdcd5889636c7822. 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/QM7282008388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882cccc340245e9c2db847f8a2f3f8919bced59d26d3b6d72cb3a4ed40143a24. 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/QM7282008390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302433a9f439dba7e1ad01dfb0fde8295a31b7d8442b212871a2f70296e725cb. 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/DKDH70900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11cf2d3f93361329ea76ea792ef4a90434c32668aa2cca0e4a438043df27beb. 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/DKDH70900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0a55c7890b2a9310f7b037a70040cd91b08a4810e3bdb9c95c08b793378dea. 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/DKDH70900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abec8fb08707ea849db1883ba0e499eaddebf2773166c4536e91d53b332f15a. 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/DKDH70900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ab1e8de2e8b737b02d51e830b5f14dd59f3fb91f77a12bf2db0b55b64912db. 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/NOBZY0501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609abbe742f04c47f33fc8ddaddca3df2b2808228d35af7a605ebbd1d17986bc. 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/NOBZY0501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27675d585aa0ebdf6c050b2cce2725feb7ccda3e97d51f0ea954880e6eb4fef. 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/NOBZY0501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b76dcb33189241af60391cc5350874c64a67af88b49ce226b23c345db7b790. 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/NOBZY0501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a51cf41b8fa9a7e5ae9c40f5a44b3ae642a09d28a7838b9f1c46a5a16d3ea9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKHU71000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5158c439087571a92273b3f26c4d5d11eb17a6c12fc9a421f93aee7272ad38b. 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/DKHU71000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de17394739c06839bb3275530fcee9fb2b8afc4451b142640fe794de5b468d6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DKHU71000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ef47fcb9536fc3e0424061e42524961b96d731189992f2a23d62424a4fc87. 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/DKHU71000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738f967429773034da7e7403b964e3e8d590eca823dbca1fc0f2cc07d27c1fd. 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/DKHU71000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ea64759be66f32a47d8c652454c3e85601ca973e1fcf24c9ccaa658d681688. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKHU71000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe31b652cc6e821e2b83b335b19d80814f187293fba3111bb3051415f7851fc. 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/DKHU71000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b129d7ca1918dc8da9331ab0cacf77014d7a40a10a2b6868bfae5c1f97d4c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DKDH71500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e1738047a0e3432031802ebbdece4be4c4e2f8fc5d49a551b0d2f6cb2356c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DKDH71500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb97fa3e36a8c7327778357e336096d74a9fab4cadbf2a3002f736b1e3112958. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKDH71500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c9e6b82919e1cbceb5eb680e56f356fcacf5a644af6d889b121e2b4961de9. 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/DKDH71500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce13ccd4c71f1b602abb7d369cd2be4edd35b67c5e3d64e69f136f13cd8a77f7. 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/DKDH71500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136d1138573c44ae0d51da2dcf11487c82f5c379a95dda79d3caaece658891f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKDH71500310.