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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c3dac998572eb32f83d2b32fd92fa474c5e5b61b74ee790f9facf2f54fa78. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00284b09-b578-451f-a96e-4716000656bf.json and https://artists.proofprofile.net/proofs/artist/00284b09-b578-451f-a96e-4716000656bf.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b423dbaab2cf95f7313885236dd9e4b9686da595a26045623c981acd852a6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FRX762393837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd6a59bd1141af5a3742b5f8ec66f87f7347a49029a913f7ae364a1ef051567. 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/FRX762393839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1efa97b5c875bd3451f1a598d587a07011868d87274f499c7769cbc96d5d4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DGA0Q2350099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc2381195d428b3dbf53bdbc7a718888a2fc3a7cd07c11c17537da5831ecbcf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRX452430342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e788baa07a126ee38a2f61e2afff06a99f6ab58b0b4a5d8c29944ed00b84227. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FRX452446761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c74daae5e1c9d665345a9594c95b6305ed7d29158a26075df60df5d1f7d77e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FRX452430343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c76750eb01774c3691a1d63620da1c9acfa0bb9275d8e322828e91b0498cf67. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FRX452446765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed8da01ba4f5db58c0d0f14a09757f6ea25423734489b21f63abc7d10b91260. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRX452446770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edd71caf0b097ef1d6658d0a72abe14553d8224da13d02b4f1634ac7d732cf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX872430854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda283100c6530870982ce4d400ae1592a96708b560b4fae4512c0dd1acba14b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX872430943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b4af5cc3c7efbc33d1dfc4682532d7b166101a45275031353f956ac1d30678. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX872465387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24ef0a156dde955c768179ec47182690a94d245f44b5803eef4a1e7db576f6. 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/FRX872465386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e389539791d5f113436ccb30e774578c318b42e4a1fdc2ba5e8c347ed547a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FRX872437966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dcd2fe5800679473ef379c198a9ac76779c3914b946cb9a74934323e241bdf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/FRX872437968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e8767b063cb5dda9c6264f53cc820d25bce4dd5f7868dbe518dbf27dd30af. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FRX872444211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd401ef92e8ec27d3050188ac2c4be3632eca4734991417591847eac1fee8cc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FRX872444208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2687b9e2b73db9e00f8944b9a2d7da63cb98b8ba5e9f1ef96c790244680443a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX202511340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d388c73af22dc51995c2795622985c593a01b1d3a207b531217f3ec6a33c609. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX202511341.