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 0x4a0e3ba5c91eaae0602a0bf33142a48c915ee4b21be4f43660b4a443fea772b6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f92fb59-6fe6-4250-add4-c5d8e3a35952.json and https://artists.proofprofile.net/proofs/artist/5f92fb59-6fe6-4250-add4-c5d8e3a35952.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 0x42601a0d8a20cbba9526c4c62f9c5d1dabc0338e75f2f54517a0a0b1e82f8d0f. 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/FRX452168820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce59bce3e33faf9122b3997dc5fbd52cd9aec96a8abfc054de1d062eb3b8cb6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX282120625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9469cbfd97a8accd84ace63e30048e406472cf06454651239d6c144f0c8d7b3. 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/CH7812359813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e34699f2badc536296611d7e9b137f42bb48744ef7726288468e6e77c59d7. 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/CH7812359814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad485984b8f7d82be47c2663eaf41a61a8daf81850496a7129c619e7a5b52b7f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CH7812359815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244f8f4b447385d6c739043a95a7b6ae17318637a9ea4160ca6e42e1e063f82. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH7812359820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989d04110cf48b958cfd96301f6d84060e0e92cd7429ad0b908876c9d8f64e9c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH7812359821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9300e65e3c82e0a995bec851909a47c9bb8b17dad4bc979a4c2b6e8b9c4e75. 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/CH7812359823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e091a6236fae5046c43637e67c7f82f2ac9a1e51dacdfa8a8e1c92e5e580b9. 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/CH7812359827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598f9e8211496c678d911a650d3aff7dbd4f550677ce0b48abd3b1dbeec2e64. 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/QZFYW2016032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c75405dd6a424c4905373e57368a562017bf231961b46a1ec44cfd210604d5. 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/QZFYW2016035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d51aa0c198dca292645d16042f931e5c19b4da9350da16d66f34ee5c9a38c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZFYW2016036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95e531fdc1e59a0a6559fe663bb3e1802c4fd651ca256fe5820c5fc5ade4516. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFYW2016037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e03258a5db3d11c226b8a2b3d840dc37261e71e0e88faf5c899ca16c4a7dc7. 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/CH7812069983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd005f29870ef41c9239dbfc33cb02f933f07c86807adee3b931621429c7cf262. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH7812062546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150890a3a407162d2c1f43de3020b42fbd42c09e387f6d567c328bb7c69e532b. 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/CH7812062547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6746ec6ba56a422e2e3e6366db7cccdaaf3a551947b94c52f92df78fe189d392. 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/CH7812062548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be96709d88697530a61180237840ecfb971d06c56948292938fa6ca39478b2. 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/CH7812062549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccfd2fac80657c14bdd857cdee94cd8acbc3138682db84b815684b3c10c4133. 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/CH7812062550.