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 0x9dc9fa781fa27b213b7e798842a619fd899a5739a441c9febd2b3d2915a74706. 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/8a94a98c-ac88-4d63-901c-249eed147071.json and https://artists.proofprofile.net/proofs/artist/8a94a98c-ac88-4d63-901c-249eed147071.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 0xb20e62fabb7393cfb32d86efcd9b273284bd92e0a53fa7f16b3df9fdcb7f7e73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LD2431304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5748760f1521713fcc7f604de13a14a2b7db929af807c3f3b532abee8ef0dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3HH2350526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7c5f5fbe1934d8df6bd3309e9e786ada7f586785a76e8f24d59677d15f385. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBSMU8919276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663501578357356aad7bbb0e674ca71356c58f8c3a7251bd8ca33202a6c44e05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU8453414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5208472eb341c1235f5aa06fb11f9fdc71cb334d73ead834db2e230447126a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BEB682000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe11f51d1e14fe6faa96606c54e0b73c1fc88fd9b29e0e0a7389cfa0264ae5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2023054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b3b8b6a4a104966b0b9a24139128724c2b58b9ff2cd1dc96625b2bf3cf50da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU7233681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2bffac4a42dd53ab6f470b39ea2fb2b9ba5fc2b5b81eb1a70bb9c07184116d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1976754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f14bbd7a7c606f1793097da9c91b9c9d0be713ac552b46822a59a344b35903. 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/GBKQU1942508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d39a33fada9a9129da16111815259d465b001221dfc556a4f0284330b55d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU1901208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa480189f58801594af11ff780f3658d0b0e92fbcd21375adef39fbb06c6bd9f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBSMU5422941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f349994c61fe5a3747f7d15632d582b9684f9d417aa7edc83a23b04ed32125. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU5037079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec96e0ae5e5de964db8a213fa3cb5876d1377ff0679ad4448dfe17fa194c444. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS761700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f4dce06624ae0271e529564c7c8d31687d17da140dd93426670037e82b78e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLS761600313.