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 0xc20ec93e9d87d60a3b4ef003765aa57eb0c7b3ba8061ecd8a28eb69f905ff42a. 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/363a6a21-881a-4e91-b2ee-aa80207db167.json and https://artists.proofprofile.net/proofs/artist/363a6a21-881a-4e91-b2ee-aa80207db167.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 0x128f818df88e3d05eff47470ccbb5c446db055326266feecc720e6d5afff993c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:32Z), 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/QZFYZ2078414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c529c9980d106ab72c5e57561484154d95d4bb141f32efe60a721384b722c3d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:54Z), 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/QZFYZ2078415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10897cd96b55f1f771003a0b6eab452fc6bf52a20cfc1581556f552233a994a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYZ2078416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796aff3c0b60993649d464aa4f4e94397562ece5760566c849177da83dab6a94. 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/QZFYZ2078418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92627ddf4f742738dc7fd32017cb22f4492aa09060783809aad5d3a039182270. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYZ2078423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46326982d832dabe4404f49889db1de9e80abf793011ab6631595fe5b721c698. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2078424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003f2ee1b73452f96d8e7aa6b2e037eac0dd01532b8c758ffa136e493d091b59. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:56Z), 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/QZFYZ2078425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11859c531660ac6347af0942ac1c01ac249098fdc28822d320fa75e074a927bc. 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/QZFYZ2078426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe754d5c1e3dae5353a963990bdabbc4c28696d5e26b504d1ba36f84d9d8f1c7c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFYZ2078427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb80fd27891a86e63b7324d22e71b79c4ff1217d7244fe1863b325512afb4f6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFYZ2078428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2a8f7c5e324101a84acbf9792ab48cb44e4ffac102bf5a5628a85eb8bd1f34. 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/QZFYZ2078429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93aa8448b938abb4c2ff66d7499fe23720782153c04bf865b76c2896a69cb3c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFZ2114433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ad996362c538fd8d54ccfa3856dcf2bff19473ccf20889c70116daad84d89. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFZ2114562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e49b015ac2a2857ccbbd3c0a43beb8f7453d572816bfff4c0e7ec3ece7afe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFZ2114571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964fc8a8f0c3e506449209edf40f891a538b6fa4b65c25efb1f4f08cc03bcfaf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB42329095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94723a900082c48549d8aba1081cc93fec4e91cd99d1815bd513cf16f214602. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB42329096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faa44a603bbc707958324c752c466d001f3838c9da0bc6df714fc4df287afba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB42329098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4846e0701bcc6c72a32cfbbd0834f53b0269bb9cb00405b3ed72ada0b7add7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:48Z), 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/QZTB42329099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3d25de6fcf0e782650387666c449c785742fbcb9f127581f18b64beff1a594. 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/QZTB42329100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee09996dfeb3b6cb3d3bbb323aff1d0b67bc8b7f4a8e4341fe616c8ef72e769. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTB42329101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79d3b71a351713fa23c8f5e47ac5d0e9c9af84be662269109d52ffe5141b7f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAT2356243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50caed97501f18cbcd98743b87dc7d961f27cb3b76951ee554b27d02948872cb. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZTB42329106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9843b02c49c90238abfa79d64d70cf91c6f4679dea45d6e687c440e4541e700. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:43Z), 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/QZWFM2469648.