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 0x361aeb6d0be4475295c37b576e9998f4e714cd1cf24c4a62ad9d3469732eeb86. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a41c2076-b533-4991-9714-ed33aa0926cf.json and https://artists.proofprofile.net/proofs/artist/a41c2076-b533-4991-9714-ed33aa0926cf.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 0xcd997c5d8894151bd2932f6177b5617efe2cb556540f1032f4768183ebfa08fa. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEMO31920004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1a1093381bf8d6b3e700a41143b736c25602a7a4d8c9e87dfe7c7f7ff5ed63. 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/DEMO32020015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39117f9dcf7ce6902ae4ed75bd796c8f4e410e1ddccbbe59bb0200af7668e5fd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEMO31920001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0081e6a5834e57d7328d3466641259add161328bddefaa35577a85953e0eb506. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:25:18Z), 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/DEMO31920007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3636bc99c7f9be824c9b7cfb20180067580ce600ae87076e4365c439ab747d6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:40Z), 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/DEMO32020017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca625fd9898464353b82373732bcadbb501418b9f62b7224dee7c3d51b8191d9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEMO32120024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e802716050cfb9ec503cb886bf2ea376cc65f0f989ebc052d381690b61526a. 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/DEMO32320042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f07ca3e14ae8d2e50ebde6af6ba685fee579ff72cd4ac99ffab0315216cb75. 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/DEMO32320045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b04ed8f7de1200c6c7e3ce23e4894b1487a773b063188e0ff4f724d301ca766. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM6N22537060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f9ebd827c2e99ee42f20d16cd0048d6e920767aef9a8a7bc4638226bb0bb66. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMBZ92557020.