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 0xf1a444c4ef4fbaac0ad05f71c3b5531fa0cdf5f384f6acf8ff1fc7d809b7e0d7. 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/b78da79b-0c54-4fdf-9e97-4c3183e365ea.json and https://artists.proofprofile.net/proofs/artist/b78da79b-0c54-4fdf-9e97-4c3183e365ea.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 0xdee35bcd60add09ac488c9a94eab525f80285ce328d973ef64909d1ae6bb188b. 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/SE4RG1919203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734497280faada43d0100889c44f4407b97a012d1ccb5ca5f68eed2ffcac6bc3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE4RG1922401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a64ef65501b0db394e436581d564f118cc67dcd12847deb0911208f3204f3f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:37Z), 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/SE4RG1932001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed84dcda3de38d7f1f9d2071d2c0e9dc495813b91659c38f1df1e2b7c6509cc. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:28:28Z), 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/SE4RG1932004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b403436927e91706355205e4ca2094c9a85e90de76e64f7e36fe7de228e6d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SE4RG2073003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e3c9150214c3fcc288fa0aa00f2b18903a25007dc8355658f40ba3cef8bbb. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:55:46Z), 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/SE6X32125401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20696c985e098a5601e1149d61302659d00fa06d602b101b42612cb25df577f2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6ZX2167802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39b908e4792d77ed09ee38b11a9f149e3c3bb9317bb2cb62c9f8ff1aecd95f1. 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/SE6RB2202281.