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 0x92744283ef89b06379b70c5021de3bfbf207f913355cc7e0e0dce49b40df74ee. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad5f0fbf-e81a-4aa7-b5fe-bcdc04aacde8.json and https://artists.proofprofile.net/proofs/artist/ad5f0fbf-e81a-4aa7-b5fe-bcdc04aacde8.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 0xd96c8fca046eb504fde2658eef07bd93ccb7797beb363e9f46c2799db8762e3f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:12Z), 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/QZDA42547223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b26ec1d072eb7505b6743871a123591ee7b7640a418bb5e79fe785f010214. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA42547224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f7319f09627a796c0252bc8cf5db6d656cec0ad481833e494eb8184047855a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:57:24Z), 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/QZDA42547225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cd6442a56a5a5aed3aa8af408e2a1f5f17740bab4331760ac25f3b98991d2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA42547226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f8607a304476e2bdf7a839c0858c03554c47fa29d7eca415fd132d9b288c97. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA42547227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a69a3b42304ee1e4dca127b5e15e6b8214a6c6b63f39aea7c20056c8108f29. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:54:22Z), 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/QZDA42547228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06138b3d91fab06f2e66c15dfcf534bd1ce109d74933e7a74f938ed75901c4c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA42547229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4167b36836edc3e9e0dfa7bd1164b76550c8bcde1620739d9fc7db03c6fa7ed5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA42547230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7770632e5fac5204045abd59616d257aeb0b52014290da7a3dc98757cd05114a. 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/QZDA42547231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0356d3df4597693c473072801b935acdcace7606e01d63786cd326fbcafec015. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EX2577643.