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 0x504a0fad71d74fa4b5378806df5675de15848d0d672a445c395db10fa95177ab. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/638036f7-474c-45ec-8e4b-41956ed78559.json and https://artists.proofprofile.net/proofs/artist/638036f7-474c-45ec-8e4b-41956ed78559.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 0x8c26136ea6d200db1e7db63aafe07e40579ba7ff191abe5ba3d599740d2789be. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBSMU8088014.
Cold Drink in One Hand Book in The Other
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9812c7f10d48e3f4fdcb35beb55afd903a6a855275cc7a35c03c19d0b5512def. 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/GBSMU8088015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60928d64cc5647a83d30be11b9f907d2351321a92d2b294111ba232070ba07e8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GBSMU8088016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc826f3306b6c9b8e42b42518919352b9ac0f61a307264d52da33027db9396. 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/GBSMU8088017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e7d6e768c199f60265a85e88432369a3665060d4c9d1221b7e837081ca6736. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:28Z), 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/GBSMU8088018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6cb6f603f2bee535f7fd9d1bb999bb77e85b8b57e34fa42af2ca7de7ebe353. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBSMU8088019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd65066f04e9a4c9ffd570ea67fac923b4f9d990ff547984081aa535f6ccc58. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:10Z), 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/GBSMU8088022.