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 0xde284a3e8ed896349355c26e2c693092f0b7e8c9b507c9995527c8d123fd8070. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5ed2289-6062-456c-854e-beed63ee6ccc.json and https://artists.proofprofile.net/proofs/artist/e5ed2289-6062-456c-854e-beed63ee6ccc.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 0x4508847b07ba09433ba9b20c8d81b429f399d6520b5da6af8baec96d1527af10. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:57Z), 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/USHM21842785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978545d1b28d74aac10f93c4e02e4192bf4fc8a987d9fc1b9acf508a5f2e88f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21842786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a00e25bec3a3db799bb53f80598f6657cdc1446b3cd52d04fd3b53fa16149. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM21842787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972ef91ccd3ae044059d25d57c9ea7b16c1146c348ad2e5e85e921f96b1fb2b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21842788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fccc0af2598bf2d7e2e1edc28196ff003484280a5bd7f45a852fb766c4076e4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21842789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0008f46cc6c1c9c0a771c723e9dc90f1cedd8f6f9dc0cb20db3aad06be286e0b. 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/USHM21842790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8080fd1905f44614f3f2672213ddf6e5265616e7a50ece25305752482fd5c540. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21842791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88aa874347064e63572998fac35d1231694cb37f430d36669e4b73f103baa58. 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/USHM21842792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac76b37b3026554f62852a395c1f330001e5f5c51b5fa64093de58511b3b9c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:16Z), 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/USHM21842793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea140521d7e37fe08a7d74304de705dd6726d7edc381326eccd7674b4fb6048. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USHM21842796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1917f61389da8e7c687e091311dc793f033d5c2a9a6cc8ca3ceb50db4d46ff7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM21842797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c1d4e97c203fbcd4c0c8a4ee63970b9fffa13511b1c0ff8c7112d14a62051. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:06:19Z), 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/USHM21842798.