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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d687b6adc434bca21f9dead7220910a12de91b7981513ee01094d6a48d7cdd5. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e9bc3df-4b2d-4c15-ae0b-68d95cf69732.json and https://artists.proofprofile.net/proofs/artist/0e9bc3df-4b2d-4c15-ae0b-68d95cf69732.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777df30c1a6c20e02faf20c8df35d6d9403fc818eb5ac76b855f1046f0c2a99f. 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/QZES52413726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b27728cd503293c9dcec41aef8f2a0562b68056fd3696458e214045d0938af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52413727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd347f274ee062632aa611681b725873c9b00b654ebe77cb378e9185697a84. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52413729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778485c75ae81d36ebc3a9b1c7dd799abebcf5ccea90979b967722c18b1a5118. 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/QZES52413730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50795337425d525aa86f2c1c47503fc87a9906ba0d4acb1d86fbfba260e36dbc. 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/QZES52413728.
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 0x93087c03825a01ba825436e2c59f1e424921ad65f2a7bdf28fec41bf3e00d001. 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/QZES52413731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752580e7a5162192891d68152e859fa8814de79f3d3b6d7e87452d1298035a1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52413732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d286ad9fae9f97aa8a3f7ace18bebd2bb9d80297cd634095a8fb24b818265. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES52413733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c8e1c0842d6f3c4ad601de2709f3b6741f71f46f255634703678b312ea5b1b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/AUGBT2446275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b9e14ed5227af17313cf29728ce2bb848188879b7f07698af893313bb6d5b. 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/QZMEM2386015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbcbb36139465aab24b418e4aff3d6df4ca746fcf161d493193dfc56cffbe37. 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/QT3F42441368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1874000d4f9af1471bd147beb38a2e4b172910aa4198d44de3ca58853958e5. 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/QZTB62290561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2219f44ac8d370bf52387228e7021958a057620fdab593d90cb8aaa149ea9171. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:31Z), 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/QZDA62398698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556b174a4b82364c9bd234fed780598cb21306a803701bab7eac44b25750a4eb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:24Z), 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/QZDA62398701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31c717d69f99afb6025d61a87131556e4cc60682d06f648d21e401387d8240d. 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/QZDA62398696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c39e9b47d2b157300632ff08227280cf3758e9cf921e01aef4f92a0c49f752. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA62398697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78f9b6fe3129338566033b21baf0e16dbb15edce754b4581b0b50c2c0ffee73. 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/QZDA62398699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc318f4eb3852d8b19694869322c8a7dc801b94b590d742e49b060a0ff5de4. 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/QZDA62398700.