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 0x938d880eda5f619b145cf13f34002a735ad921c81928e6b707f8c9f533d21b4d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fde5ad73-85fb-4550-aae9-6157d7756385.json and https://artists.proofprofile.net/proofs/artist/fde5ad73-85fb-4550-aae9-6157d7756385.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 0x10a92c5ddb6b70c0b81c1a36455260ad7c13dbdacc3b5ec387d8ded20281f15b. 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/QZFZ32228578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bb62d4f22a5d53b908eaa546cbb0874cd771bc669211b73562234fd8ad60c8. 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/QZFZ62249032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277b8b49afe3aafb88db06137c60c514d5fca4270e4e37ba113590fc8a11bfa. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:23:11Z), 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/QZHNA2287169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29349d4d263e072cede7852d25fac71598759de33792f2d7b87d0d54c6f2e6e2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:56Z), 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/QZK6F2325197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054ff57e52364d2e69a78ae6be53a1f88b2b5b3e86bb0ad9059d4c43ee297f7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:38:31Z), 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/QZNWX2376588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cda257b84a286b3759dff9f845287a28cee1a6eafea861001ee17f9312a2c9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES72444341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8fa163215f38da015b374d33b9077da84311aa709da81d26a28478cdaa262. 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/QZTB52446384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd1802a1f3eac1c2d5310f0a28cd475b0aceb305533462323f85cef31fb3ba2. 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/QZZ7S2458792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235ab6923002391384a15bfd3602c0fb9a5941a7d788850f98864490ff4a413. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMER2515659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b514d5b2d61e3c20dd3bb1f60eccd57c3411279e6bf6aa9e98283f860bb6451. 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/QZWFW2506982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be0c8dcdde3b29cf3b9e5399fde2442e51399b266ba9ec6fcc72c450faa8328. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFW2506983.