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 0xf71d03bad240f5f53194ef44573986de2e9d310c8a42d1638672058c6542f756. 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/a57646d1-690b-46f4-8904-42566ca9a158.json and https://artists.proofprofile.net/proofs/artist/a57646d1-690b-46f4-8904-42566ca9a158.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 0x1d61162a3b2ab1d80255132d10fcda97b899a0a0668fbddabe9cdc81ec0b81c6. 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/TCAEH1957739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b3baa5413f72f2d14df19cb012d93f689fbd99488d761ebd349b4734768b5c. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TCAEH1994435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c76e797b324e3956e724cc9a3fb3042f82985818096cbaa7ef12a58c456c48. 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/TCAEP2038763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc52012ec3ee1950ce460db1d9461359500de429ed606e0431134ae2dc9a5094. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:44Z), 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/TCAES2032061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc21ba15950aea4a9a482e63c3cf0e67d5e6ad87ae44b0bd68a73ec719d844. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6A92000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935571ca54fb1e7e47b61085bc0942a361c2ead28a280c39a242e1408f595f8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:18:50Z), 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/SE6A92000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13cee6c4c21b2fd0cba4a24add26a04fcd20216f0ab458dd5f97ec6ab6de90f. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:09:52Z), 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/SE6A92000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c397b651951c71945b15519c6aca3611dc9ef0b0bd599fbbd41fdbd23c02df. 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/SE6QE2184003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e9b5da747a8b0d5abb18c4601d211954b2dabd4f8c2799c7632599a8d927e1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SE6XW2122295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabcfc30bd30fdf3c8a30c59b60a1a7a8c3e1ec785135a61f12783cfc2d5d0c0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE5BU2258778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e32c369e49bb2a94d76dbf5c6d91fcf05f06f201b96794d2cdd1d411ff3c6f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6HN2340758.