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 0x457b6840ea50ffcb8a640ecdf35116262268f1cc45c2f614b921124e3993e7f1. 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/921a2e82-d5ba-4b87-a949-ed0f544b62e2.json and https://artists.proofprofile.net/proofs/artist/921a2e82-d5ba-4b87-a949-ed0f544b62e2.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 0x7abb886494bf007b7fcf54aa01e847e5cd0a159b645d19514416733826b40a1e. 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/TCAEZ2082820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b068a9c4bb4c0ece62434687ce28b13e8636eb70c4bf7e9fb2816e9071785. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/UK6BP2200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651edbee5f1c493a80253088d040d76f02eea0a8524cbfffe58c04c0747e6baa. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/UK6BP2100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b068a9c4bb4c0ece62434687ce28b13e8636eb70c4bf7e9fb2816e9071785. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UK6BP2200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20d6624ec6cf10739469179b25a59e1b657928e852e6a4dbaf730c196ff13ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK6BP2200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521c565781e6f32218af68524b802ad6d8ed789dedf04ca0999165b0df02af31. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/UK6BP2400548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40206d1d146b8513e0b985b7607aa5c8f71f8f51532871ee7718eac5f4ad2212. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK6BP2400549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7cd4d9addadf1a6da42d4d69a053c31bb2d6708090e781119e51bf6aa51d1e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UK6BP2400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3313d09adaa177a11d4180be21c1d705a2119753c78a177cd6e2d9b7738acdc. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/UK6BP2400551.
Between The Sheets (feat. Selina Albright)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87257d2650c3b2a09d252e0cd4be60e1c432be60dab73e3fb817b5dfee0357. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/UK6BP2400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e84bfd86a8b61ff0ddbb0ee4e2dd6ef5a2d77efaca02927538b891596078ba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK6BP2400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521c565781e6f32218af68524b802ad6d8ed789dedf04ca0999165b0df02af31. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UK6BP2400548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40206d1d146b8513e0b985b7607aa5c8f71f8f51532871ee7718eac5f4ad2212. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK6BP2400549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e84bfd86a8b61ff0ddbb0ee4e2dd6ef5a2d77efaca02927538b891596078ba. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/UK6BP2400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64a47ad044732b3173d26e6898311d4753290f7d73734445ba89bd7ed549e27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UK6BP2500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154c7585eb7242e8996afc57c590cc3008644c04287964b406b2076fa222781a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK6BP2500661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154c7585eb7242e8996afc57c590cc3008644c04287964b406b2076fa222781a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK6BP2500661.