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 0xe8b1a590869b6cf105296c71b7a40e508a9afcf1970e989acf36cf4e3f568827. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35fb6e5e-c0e3-4fb7-a8cf-96e74277a66d.json and https://artists.proofprofile.net/proofs/artist/35fb6e5e-c0e3-4fb7-a8cf-96e74277a66d.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 0x286b12c7a6666c5edec16a9f76b25ff567407e4ae9d0bc89ff1e34017d040d9c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDHM1826391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361de0255a998977ba6a5bdcf42ecb3802b02e8d74defcf181de624904050936. 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/USDHM1826392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca4ee2215d1b51c10c36eeb8025be50f59ef11fa184de3478111e0777528f84. 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/USDHM1826393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a865c199a2c3264ed21feef4a6f8ffc335967f5477e286c10b32cfb21d154. 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/USDHM1826394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936d93e4f17e56190c08f380711cbe4b6b70f848b09593409942f4d367f3c5f. 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/USDHM1826395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce7460058e7efb7ede984734f66329f98f942ece7a1f0e1f8c0841d5622cf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1826396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a42d8ac594ed8d46ad61c09e844b9ad57e496719b8007d65454530bde7342. 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/USDHM1826397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6cbb4766bece51484b165237d287c9dd50d6d5a27b14a5885738b9749194f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDHM1826398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a2b8952637e5f2700265a0296f935c3841547ff8bed398c768dbcda8d7712. 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/USDHM1826399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241953122093c7d43d1a088c1bdbffb4e5f0a6baf5e4718e6a225c130a729a6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDHM1826401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf076b5f7f62696a45deff4c8b7e34b0640d78e7c41903d14a4963359413800f. 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/USDHM1826402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f94bc58c85db8a0e41bda0155b52a072c5f38518904ef84b798a78e9f80d6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USDHM1826403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b633f029a18bd728181ff1eca267e643859244279deec6ee23a3ae51ae3e5d. 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/USDHM1826404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921236703c54bca4ce060c93029a6a3066255319c7fb58dde7422bc4ddb88862. 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/USDHM1826405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3137a9c426d1d71714150cdc98c539feb486e48b3b9f798ad379531076ab47. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USDHM1826406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b047b5458391576e04a5afe2164d5a3348c7922bd52266e744202cb3936171. 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/QM4TW2037718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc584a30c4db567f399acfc11fd81f224f280e93aa6b8b1743f5731c3459c333e. 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/QM4TW2037722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bda0696586845f4dddc859dc8828aa1ab018f3646e42a5cb8b292388ab77bb. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QM4TW2037725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d45990b9b87d47e4b6a00a07a6b347bf0eccbd4cf809eccfca3846d155205c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW2037729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114763bc25100c39e13b873d91bc175388704358d1dd4fe55fbf10870bfd2cc8. 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/QM4TW2037731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494092a609a7a8c691e5d5c51538c3383c9e592c0720d70c76c283f495c22ec2. 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/USDHM2407602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024ca077f4b37bf0c7c85ac8d8e3429595b624a09eb77bef296e68647cb365e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDHM2407603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b25e96fe4ed4cc52df3c948b7dc946015355905d6e71cfbf898ecb71ce7cf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHZ32244695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025953e9be3e5c7f0abfaa7d58814bf25f4b46ec90e80e8290c80a308624c8e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZHZ32244696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33beda34e55fe5d46508588652875b77575312b864053dbf15c4095f77740281. 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/US7VG1904538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3acc74b1d71ed8ff3e722c8569b2265029e7fdb7168a35119ee389f910ebca5. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZNJY2442075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073c2dab40d659c16a50cebd291bd5299cfe83890e1aff032e4e316228e699d4. 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/GBWUL2415666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08a7ddabd2ee0a75a9a3c7040da5bfd2c84d417f59f9d41703483e04a35a22. 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/QZTPX2300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec35948f9849e17a00e105f983a3cc731a7180eba337164ec8049f679b3e8ac. 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/QZGLS2085199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d868f559d479f1db76b2b9bb8e4e072f7f1b1c8c1f62b8cd7b2923f0d58a65b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG1829636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8029dfb62d5ea48d4422cf89f02578527b57612171042e68fa6c21d95894c9c. 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/GBSMU4207982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c2f98fdbbdbe70c8db5dcdd211e15df8b530e0c86cc3874ea8ac107b36df9. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM7281988942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc8ec59e0b41397ec3b9f30b978786c540dd396dbd7d63831d2b6af6610d11. 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/USLZJ2292462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9908664b6fd4c1a26b10bc47b7c0b9408ca5f7aa0ec3d104e2308798139f7815. 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/USDHM1717155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7bf7b1832aa1f291e92d2aa96f8492790193154c4499a10d2402f81693b557. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDHM1717164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c92d87fc8d28e081456fc9b44e16da2f89b468defef07f43559dfa39ebdca8. 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/QZES52255305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc144e432fcfb4cb38dd4e36a4832a09ceaa8c826f03c67c0c0295ee0b7eb9d. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZTVM2125871.