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 0xbcae91b1aff503c6794ac2aa1b85a4c63b16258931636f07b5ae07d3b150687f. 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/b44e724a-6e41-4f10-8baa-94834e3a172a.json and https://artists.proofprofile.net/proofs/artist/b44e724a-6e41-4f10-8baa-94834e3a172a.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 0x61ac2269afc5a12177a5a068a018676a132eb111a98912c4d6ef637a01f7069d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:57:06Z), 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/FR10S1414959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259559babb3b587b5d7f788231d852d69245742622278b0f0389eea05bce3d4. 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/FR10S1414960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af32ba9e24d591b459d7a9e845daffcef644edc1a98b2a31c4c026d56beb5fa. 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/FR10S1414964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d0cf348ef641e53b2220390299321d410274590c328a0a15dedf47f8ac733. 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/FR10S1414962.
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 0xef75ab69f002ce2991b772a3614f437d8025a222b5f805b68c92827d44292f32. 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/FR6V82540063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1bc9ddc3c4709a0a6e87382c1b00f73ed34caf7ffc03809aefccec456919df. 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/FR6V82540066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb2747cadb0cae4412d8c5664ba19247436d3793e8380487e3f1eea558d55b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR6V82540068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f28b3f064d7d3df0fe830105c6ef759ba97e917cf55e54f1b983b327e7387. 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/FR6V82539403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba72ef4b7ce9113f7958c2aad11036a06651ae114d151a9462d546301a7f0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V82539410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acb63b05f4afee2dc74b04886cd206c80e3abc56ba97b1fedded6b67ce20c9. 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/FR6V82539404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df161975bbb6eaa669a880ad3246fc97da0088d83a20f68e4a1e57a860539a5. 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/FR6V82539405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01121e9d785a7959d237408cd489506a6dec97d18652afdb9d7ddf1b720e9f9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR6V82539406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4552e94359a9ac7f8255e413e6c38b086012dc7805e952db29323884b789fcba. 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/FR6V82539407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5448f977b97ed574f4f37aa39d1cf59dc165c58282b747e4a2636a7bea99ece. 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/FR6V82539408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e2751b143511eed5df18fbc9ad8676d7f304de1b47e5d844943bb1c6a1430. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR6V82539409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab5ebdef30200ee0592947e28c6e7602d9a98ad48f5ac9c44c83da0bacdf2b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V82540055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8477b9f8305d10042649b70f02764b00940ca4dc51e0f850e86dd38222029. 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/FR6V82540060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a4d04141e22cd06ec8dab45e3b89fb5a8dc4155a49d9a8e1519cf6f5071f57. 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/FR6V82702164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc488b6a8fdece16284d3ed1bc88f3bd1751ae1809cd5a691b7b27144287e59b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR10S1414917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae659b20ceeecdb0d5b55707e25a3d7c3a63a1fd05f14a348bfeddc03238f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR10S1414909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20982a23383392e3c0a5eee29b6f8079c15375f2d49a20f9573776d8587b506f. 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/FR10S1414915.