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 0xeeeb4add9a1549a37ba0f2c23c03906cf7636d6ccfa536d3d69c47d939784bb8. 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/7dadaba2-40ce-415f-a0db-b1a6d6c24b2e.json and https://artists.proofprofile.net/proofs/artist/7dadaba2-40ce-415f-a0db-b1a6d6c24b2e.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 0x69e409481e74a7e98b8fc2b972fa4bb33ee407f1ab8a4ebd621ade92ddac8f18. 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/TCAGQ2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284c42ee3642d003ba229e84d2240648a3aa386ef80a8b6b0b97d17695e31c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS2379566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad18dd61a0fad9f57f4c6667ed0f47c931f5d0a9b7420a9a8e0111532335e71. 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/QZGLS2379577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bf157d0be90e73d7d762281e96d5ca77c8a360bbb2c36debd243b4600d4f36. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZDQH2396288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9452eb5e287709d3e4d14f1b94b5978cbeeab650c48b350eb2da591ecfbadae. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDQH2414874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef5581fc72443a769816b5f1490189627d3a19dcdc8bc02d2529e839edc1c1e. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:05Z), 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/QZDQH2414875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6214f183e0a70f01db499471eea77a28c99175ccc2d36e9f7156057d781cd0c8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2503894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a4601d2186ec5f6ac14cf11dd36a2fec33aef74fb2b29e8ea9fa2ed4f5bb9b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDQH2509687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51ec503eda5d86a9398dee39cac5ce9b196ccdc51c9ee1aa9ab056cb716cf1d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:02Z), 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/QT4C62500636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367a4ac1821cb6b15daf38ab832501ecbba7503e735feade54fe40264406cda. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT4C62500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcde271000f52c0ac6031e018419f1bb1869fb154f1249dc319529f91ec4275. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:39Z), 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/QT4C62500639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9e4822d05a932165004d7549b8a6e30fb32fcb61b4f861043f43d2ead4e631. 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/QZDQH2387480.