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 0x266ba570ff52002125f603dd561fbc35a1b548954fccaabe0e349523414e4886. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e9269cd-53ab-46f8-8792-a615a072b942.json and https://artists.proofprofile.net/proofs/artist/8e9269cd-53ab-46f8-8792-a615a072b942.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 0x00f3d2f2e83f8a65c0f6aceba17cbc15b8a537e183ae22f65eeccc1122115c68. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:14Z), 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/MXG382100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ecedf9e8be0497a8dc6766be68f6afd7f8accbdc9e0260789beb1c677e8d5a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4R2360955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd606688ea11b6cbab1fdb9429e23b00a3e5f34614ed28a0773c6fba156b33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22495766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e744631b6ca1765553f1d94a969372a9990673be209db3be459d7a28f3f2b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM82414051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48a7842539f1178e3cd73166712dff516f83c8817c9d36e7c3ccec1c2ff1ac9. 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/USL4Q2449149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198ee2cd2030b2c40b6817f2ac3acba997b377ed28ae17c0716034ae23e7c223. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:38:11Z), 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/USL4R2470519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31b3c023420f74639bc1fc5eba23584c7bb6d3d072f04cb5b1c81aa4d2aa681. 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/USY242407916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cbf089bd1e6b7ba00b16976ea3d2c5c5031b529a47bf6677f405ff4c7af3ec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM92534802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b89a1494a8abed3728432846197e3c7858d0e947ba3935281ff625c4eea32. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4Q2540821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe870d5a8a6760b78736933974ebc82585b7f13f34a6882957779b9c3daa999e9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:13:06Z), 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/USL4R2515730.