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 0xfc624d060c6ecc2be31c99548f8030ecc839b9576700ed8ba7fe4775cee71bc6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4b9c718-8e75-4f91-a9e8-54d8520c293a.json and https://artists.proofprofile.net/proofs/artist/c4b9c718-8e75-4f91-a9e8-54d8520c293a.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 0x968f5eb803abf92f3246b837ed04a3b8df6e5a7301d78ab94a0d9b7447f0d71b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA092432224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968f5eb803abf92f3246b837ed04a3b8df6e5a7301d78ab94a0d9b7447f0d71b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA092432224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb89fa72b17490e0e47f3269a81af9c5051e510969f017a803ec2fb1438bf568. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA082427072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2826281699f406282e8634ec9adbf2ce3e9776fa60e23f20b1b2725cc81237. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA092432226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b224a5b64f1ab99f8897e42bd6094b260f6a2d4b85ba060746df14a8e2370ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA092432231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d4b8992c36e82c2da816e9b24bf1d7589103da2b22e721f9091fc6bad10e98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA092432232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d3f476ae46ace42414be05292223f3377fea9100e64296c8f4c95692643d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA092432233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ab6b598c57352ab1f967df38d7e4509be91b8a896991da3c091f6e6d35c4be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA092432235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30fca6af2c4ee6a92c8a27e0b6d34d438cf8957f8b729c4c98e9c664dbd00d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA092432237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ab6b598c57352ab1f967df38d7e4509be91b8a896991da3c091f6e6d35c4be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA092432235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d3f476ae46ace42414be05292223f3377fea9100e64296c8f4c95692643d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA092432233.