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 0x9e4892bc8e9452c25ddf44b1c7da1d10e48712d6bec16dabd47ebf7d490d6d59. 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/1b4b8705-3b1c-4f4c-9529-bb61d798593c.json and https://artists.proofprofile.net/proofs/artist/1b4b8705-3b1c-4f4c-9529-bb61d798593c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Week of Aborted Bike Rides and Broken Pac-Man
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 0x9ed504bc13f13fa93b407a12184776407a78b29a5898dcb768d9f779e16eab80. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USMH92386127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9582fdcdc1bcc081b4a01f32cfaa39396758cd164b80b803a6cfe5ed79234. 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/USMH92386128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0329220ad7bc4a88d8220148c909fb5341c18924e3756a0a7920a6a37354bcb3. 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/USMH92386129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec93c01e9a23040773d98165c12cda45039997713d9e9e1543737a93437c609e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USMH92386130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ea38bc6fa9166f6438f5ffb143a266b417ed2f49690f864a83778df5e99aa. 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/USMH92386131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ca80a777f6b1da3fcd291c1bfdffa56b48c0d505cfd40bc03a80434125951. 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/USMH92386132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7127aeea7a2215f5b742926664c94b7667b5a1f8ca2e7b257f92c4020eafd393. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USMH92386133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eba73fea158193ede90f7ac3f62a4ccd101838735dbea13bfd5c83c8020996. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USMH92386134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468e24603ea5da1cfb56bb18892b35a7d88d306e0a220ef1791452657bb31a68. 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/USMH92386135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500232c5851e42c5b151b31b1543500f3c36888a249dbc0b3e9b5e2b81cf4cf. 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/USMH92386136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d421caca534e2579a7bd9165c82ee25d7994ab67760833f357d59de0eba88c0. 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/USMH92386137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4542fb94063c162f628c5fc7075b578601ebd9bb54650413e406d74b6902ac86. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USMH92386138.