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 0x755c4baa8d87fec23e3116dbe0b9d11bda1281360043f341142a4fa24f1ce6af. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1c5a808-5329-48e0-8b9f-b1970c76294b.json and https://artists.proofprofile.net/proofs/artist/c1c5a808-5329-48e0-8b9f-b1970c76294b.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 0x15786b941a525e0c37146bef2ab0e65eadc0bd8bf5e4a58e3a6b4c17347b7410. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/PL90K2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eca30dd272adc8bd99759469803f05d8dd59884b82f853aaecb15897fdc61e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PL77Z2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b324b1683c82dce4cc5ce0a966803d9b5b629fa48dc6a207a058b0f8e3170. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PLX322400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c73c95c9ba4e936c418fee645c82fcc7e7e46d2263e4f6ae7345501d4fd88af. 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/PLX322400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58ce7334fa8748887773d00355c1aa9b5bc37cf68c5ac924e75abbfd9375f28. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:35:58Z), 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/PLX322400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9167e1bd0683b36ce92984133cd318dc8ab9d341ba36ea7ae4b5ab155093d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLX322400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76c46d5353815ae2e3b10a8e545a772f97d4ad8b83138b55308abdbfaaec48. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PLX322400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfbbe0c0ae94e6667282b0bebf3c9a0d5396b35a2e1827a461080cf9970c9f9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:48Z), 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/PLX322400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfef924005b842d7bfe39a82ba76ac40fe7b3286db8b03107c2ba347b167bfb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLX322400024.