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 0x6eb8dbe5d48976825118a15b3e17e5421d3c5ef9b665f71c4df781beb11bb7ea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07993c51-d273-4594-958f-04cabc210ac1.json and https://artists.proofprofile.net/proofs/artist/07993c51-d273-4594-958f-04cabc210ac1.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 0xee402fd38da69314f3c29d28d933b40c1c6c3167073f57dd34c4339ca0880188. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB32496210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1adfa214035645107689efe51f41623d9f821dbc22bfefe21cdc6c9643ca153. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAZ2403373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1fb71b20329f98552d7afd3a99b6a7149d2f37b57b21f0e27f39688238e354. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES82434275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3562ceccce9df3952e1857c7778ebf51d74363bef5d0a425134e3aefc0007. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2320309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aa980f741734070a654bd9f47807b7ae1cb3cbe37f45d794363987ffce7a9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA72391700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5a2041ef0f1890358df18631650ca39d2fc458cd9171b58f89c386e894d7b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2308111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe732a333b91ce11cfaed5c679ecff250877b51c243cbe10141799e4e335b08e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX2308112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bebdb5e561b7b6a56794dbf59ff018148c34446190bc6430093a86089d33d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62252549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dbd1d6e6e5c2772fa2628fb9294d7973e5cb0c8ae1499cbc9353f9f29a47ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62252550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54154a46690e502435740aebac9c09889d6777409c1db1b7c50dc6cc7104a309. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES62252551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5eba16f6ce3793c1d2f1bcd09e92a845cc29f9e3005a5dc773487e348e2f8e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62252552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4a685351507ad9730fc21593389ff2f3dbcc1b274f9bde1fc707feb3e04cb9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62252553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fff6ebc7e6d08f3d935391b8505df0d43b64a0031ea00ee38d5b634966e1a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2008750.