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 0x7d0d7fb2c244470c5cd30dc657293be89e440b9d9faeb0899a54f6e38334c1f4. 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/c13a4223-7452-401a-b5ad-05234717b98e.json and https://artists.proofprofile.net/proofs/artist/c13a4223-7452-401a-b5ad-05234717b98e.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 0x72c42159f063a4c0c3bd6e3726bcf6255621d64b611054bec8d6a236f3c26565. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMHN2377799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01497367e501745c3441fd73c6a621c531cc3cb998a057426c21be5d805cd265. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:38Z), 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/QZMHK2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb798b1c7648ac73fd6ae97c5423966d95804a889abafb0946d4d72e7f21b3d60. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM42K2367559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aa5a3fc56ef484b43775e2155f64076b332eda707ddc8824dbeb19a8513ceb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMHN2341779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a788cb35fac86d90e4f83a42b79cf331aa0cf819bf5959106c20fda747823e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZMHL2307163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd857d47ba65b4acbbca1e3e87bdc3b193a44d99a3a28b4959d9cb1f1e0bc8792. 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/QZS652371320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148cbf933e175cf27662dd9597293434e499e4f208147eb334603aafcba1d32. 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/QZS642372610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d5acc513c0adc1053a2a2eb5a6031a4bfd68e8172ea50119b439e5ddab4bc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:02Z), 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/QZMHM2392729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73221c2a4c6e5f9fbefc521c20dbf9cf0cea2f3198b31fd1ca9761ed6c44461d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:49Z), 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/QM42K2316445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426e5ab953efa439a757e3d509e25137c8252b1dc02968fbf1e88f0663c4987. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMHM2343742.