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 0x406228c06ea5ad64c9d0ac0073a4fa8f90f7de3dc34dd2178e1d15c5fc511cff. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4355448-39b5-4901-ba1a-39c3a1acf99b.json and https://artists.proofprofile.net/proofs/artist/b4355448-39b5-4901-ba1a-39c3a1acf99b.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 0x986aa022240b028cf54b973c8d47ff6891e6b7c164c60ef6f6aecf3fd2444bc4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ22288031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db9b78d3d056848d885d51f6e54a142d5898ec792fef99682002fe3caa832a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42303057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b65e365bad1d31a53b8fd5d31d24cc9f6b29bd466825833562cb286d9b084. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBE2384074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9310813b94b7f3251323343dd44e1d7bdfd71d30c208c496834802630bf5be2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFW2410185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac7d8966c9f5b1b0a21dc02894f063a86ac95acea446ecd396943f370dd190a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7X2475972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc9e0386a721e4080039acd056fc1294509d32464254178a4ccb4ec083b12b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72504924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de0cee143fdd200a48453bfc1c2e9329d2f7dcbb4cb32640bea026a78389b04. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZFZ72504925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbb8332f4af58305f2f8f6fa190fea01805a7c7598a43e93c02ca89772a1ba7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:53Z), 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/QZFZ72504927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452b0dc938497066dd57987bc5f5597fff56e304964282fe9423fddabd9932de. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ72504928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1823c4d561fd14fbccb5447d87dfa3781819b5dfe727d0d273b5be9802716. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2548396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104324e36d9b7d093023db19adc0fd086ac40ac3e2c521af86225885efdb0315. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWQ2535856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872d88d1af3f0273812ec04c8981e91d8fee4856ceb838ed1fccba96debcc087. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB32511750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc417749779b5f70c05b9230d6f3c9f0550ebf8d6f94407f5a5f001a4013edb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB32511751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4254eb32c6af2e66181b651d46ca1968b007377434415393852118df44a798f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB32511753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddcda45a8914eeccf473d075e72e93cebb71c09c44088ccac8bc91b354484e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB32511754.