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 0xb7fe1a3fa6ed29d5bb5d12194cdb0e149a10fb12255d72816e1335091b57b2fc. 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/82ad2377-b067-4df7-b137-0dd17c4cec8e.json and https://artists.proofprofile.net/proofs/artist/82ad2377-b067-4df7-b137-0dd17c4cec8e.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 0x8961d8d551c502d4433586848f2055326426a0f7c7f697526d09e844fe09357b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USANG2242233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9652249f88d82bf5c6ee5363e0e3d627b1c9b2cf1cb3799bedde2ff5077cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2242231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7573b74a50e5870fe8324ca66dd13245dd0dda9b1e93ebe809886273c3bff. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USANG2242235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67799fc66676169667b1eb1a5be4f6f6d3e342aecc2d793f6fc67a930d80649f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USANG2242230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6394bc023eb463afbaa51732e3b52781bfe678b853e2b4d69b5068889924a2a6. 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/QM3DF2206449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cb9825ecf93ff2823c58f471ad20d392ed3e6727232d765c4a676c9c965ae3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM3DF2219453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1098fc283d11f1e9709433c63ec8901cfa6e4183ea5121c49a618513ca3bed5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2220885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29dd8f66a9f153bbc51cf1cf525c859d595353d9aab76a451514b17ad105d1d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2220887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bcab60ad4107b5c8dac37c2c0c54e518bab06cdf1d87583bf2535e86193232. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CH7812351566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861ed6bdac42fbfc102cafaae3dd00de8face4c52e53a02ee9467252ac51bfa4. 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/QM3DF2211156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041b816dd9b4b955f6f4814716dbd8df92a792ad9b4e44b467eed300641f452. 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/QM3DF2288901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cde3ea335a8bcde3ca10d321361f9bbf4c23cfe9bc70d48185e19a4410ca0c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2453212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b5ba587c56a37662c2158ba0fc8ae9b9b0179d4c85ede963d032b082b4a8b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USANG2493713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789bffaacb6b22059ce99cdf4ec9768d1120671eebee3fca433647f00ec28151. 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/QM3DF2422553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d6a7e4817e79562268b252eec3c80123bda7e8d4079e16af1ca4e6fcefd291. 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/DGA0Q2413459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0cb7acd590e58ec92f4f301126d1df55a5aac6e48663030984678bf7d77850. 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/US3DF2536543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0020130e4cb4d570f910bc368dad8b0108ea62bb5c092d858c40bb209226a9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US3DF2578612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924d12cb438263888d9d2f1723db3f513723ff63491518fb6838a1e20ee243d7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/US3DF2579442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716e55adf626ee3398f781f843fe2e1f78530c5fbcbe7aea0de7ae10210dc53. 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/USANG2505878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec3cfd11349930a7d3a8270921b81a9a5ee964ae23044659703596ef31ebc0. 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/FRX872582821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33ca200f6e2f32280d7cef95fd680fe49f70f39869edee4d00a038935a7fb8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USANG2531387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffde51c5def8062be90b6603f711aa566a560f610ae031d27fbe04aa3bd3201. 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/NL4YD2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f418281123013101f655c554f9be06760e3f12eabf111835de8d5b7df83e5f0. 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/US3DF2499801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d29496ee37592827b2ec31501ed2ee315d9d4737bf456abd34bd7225f93c5ba. 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/USANG2244252.