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 0xb34e27a7566ac0be4ae68d5b5ea5e194404e4eb35c09e5b9aa4305223c64d0f0. 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/204dfd0b-5258-4b60-9d86-455dabf391f4.json and https://artists.proofprofile.net/proofs/artist/204dfd0b-5258-4b60-9d86-455dabf391f4.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 0x5474b905c9375b039387c8ecf2bc584588060adc969ff5e08db2ddd35b4098a4. 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/QZWFP2357077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58fb62dbac49843041099f3f237db62e7717d7f26aeae32b77fe8e78f622aa2. 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/QZWFP2357078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ad49e1c997be9b3d00a26e176cc45f22370eaadbb05d8253593ba111ef46e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFP2357079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbf7c9bd20249a9585005936532881bf1535c9e57736de86fc8d9b977abf03. 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/QZWFP2357080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dada5d7b5fc0958b8f086ac222b14580c82b31d14e5a9725b826fc93f4dde87. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMEP2473767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa54e48f25fd2952568f97d331752d589af4dee7afff7c4605a99e21835f80. 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/QZMEP2473768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42477436392c332802a26f24decf48ba7c0d9cffe2b43eb0ef4f38074787836. 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/QZMEP2473769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607417f6e5b385263861327e354f1461249da15945622c4366649cd45796379. 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/QZMEP2473770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09110dd6ecf51e63852418ffd59528a1ff70ecead7da49cff1eef4f6df95562. 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/QZMEP2473771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241fdcba01120c2e04c2cbdf0305eaa995ac84327866af385199033cce3a7cf2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZMEP2473772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ef5208f064ee5f1f3bce9c8923205fe07b4b543f742e80d17275def6cede57. 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/QZMEP2473774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f52d841b0329a6c86de9d1e1ea37d2085614dc2a1a91dd27928d79033e95177. 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/QZMEP2473776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d190111ab8a4f76800f8ff39e678909c4663e5c2418535365abc9a825284b. 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/QZZ762492495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14700030d40bc42f5b752236d87b9c407701a15e10ff4ed9d46959332420bf11. 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/QZZ762492497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebced82954b93ff9d2ad5e15915968d663947c333c9831d0df98e018bba2a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZZ762492498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17ea3ea721b2f7dc0fcb9fc846e4b383505b007ea832bccf43c37463535408a. 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/QZZ762492500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6c6e6a89f68dd5b17cae6815f12598a9fa1792d4c8ff3f31315e59158c7d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN62500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367480eb2e010c7782286be66a9841296f74008bcd5fd2656453f84d70bb8b4b. 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/QZMEP2542203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f8e14e785147a70329e50bf449562d7e522d2b236d443cce47b61a6db26a3. 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/QZMEP2542204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119e15ba56a9705b4f3828f85dc46ab3e4cb695e3a70401ee49cb7347d8e13bd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZMEP2542205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6c6e6a89f68dd5b17cae6815f12598a9fa1792d4c8ff3f31315e59158c7d0. 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/QZHN62500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395868afea9a7598834670224b7d7c2e3abf66fd11babfd8badd41b2ffaa377. 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/QZK6H2299111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eb5bdff8e2a23aa81507625e3a358cda08e8d6e8d1bbb8399c7cf7147b5379. 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/QT3EY2476718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4fed9a50f84e3b10ff3d3fff5614e4c0d645714bb82fbb53566ec67f507571. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QT3EY2476728.