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 0x14cecb779ceac86a287bde47a4620a9730f58a61db0853f4366c005aefe1491b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/799ae4bd-1a5a-4bf0-9ac8-d6cdfa1155bd.json and https://artists.proofprofile.net/proofs/artist/799ae4bd-1a5a-4bf0-9ac8-d6cdfa1155bd.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 0x599a6d04a19fd44c15ac7105398ed08ea9075c5411ee2d978077192c612635a7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB42465135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8c84ac4b0299ae50c6e40db8fcd1c15c4449f751693d48de6d4cc1b0324093. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB42465136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06165b526711951639366ffdfd1adc3ee707d5c34107edd76c747e6666353c2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDQH2502180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7128a5598e5487d693ecaeaf7173bdc6d974b69f5bba23d166e3d156cf068e2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDQH2502181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee5febdca54e240731e5051a514b5b6ad5ee92d73500aba861337d8997b6fb3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:54Z), 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/QZDQH2502182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd96e8e642aae44cf337067197b8dcdaa900a9ce4691998586c4fb56cc549a2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:08:01Z), 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/QZDQH2502183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e4f377ee51aabcaf36957ea815d334d3e17f26d660d7ecc5fe814008e6f6a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZDQH2502184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f099fcde430416deb699385c738a009a321075c2f666c6b8b1d51f8a16d7ff. 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/QZDQH2502185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d3898f8fdb2c1dd225dea13d4d5abf0342818f5eac0c03c775532d0fc4dbce. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDQH2502186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694602e25c8454dd56ea71117158f45fedea26faa59ad8b984f4e4ba3d7d4c4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:02Z), 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/QZDQH2509072.