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 0xfcf4537fc092097e086736d04024728b21d3e7e8d4fa09639fa60468e3c602fd. 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/17aa3988-29b7-498f-a122-53367f99e5d5.json and https://artists.proofprofile.net/proofs/artist/17aa3988-29b7-498f-a122-53367f99e5d5.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 0xc4cdcf63bf28031984bee43f9d90f6ab87bf8a70a168a80d1bf2406173704083. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/EESM11900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c254319f04feaac4e89d149292e5552db30a22659087b138d1b2095cd6d452. 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/EESM11900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ed79274931a9ad4b1d27d8201df310ba5a539d51c66c6d5aa4f549c334437. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/EESM11900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355820096d10b4324960841ec468408b4627207e2e73825f5a72597d1efd3e99. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/EESM11900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2e862ed147f11e2c803feea45d8ce23adcd8f433d70a7415b932afb25f95af. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/EESM11900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c5b54bcef5b5f23159c7ef177aedcf349e30bb3f69b84416371babe1b8b841. 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/EESM11900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c85275e49e68bb573cbe21c76c2b04443aca9fdc98a1995204a563ceb2a1687. 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/EEFC10203301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6f39263cdd61494c7153dcb4b6ceae2fece02291f4413dfc0dacd7d5ee44b. 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/EEFC10203302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df97835f5bc8575cc63e68c73569cce576c5ab16465b13e6c7edc050470e9a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEZC62115600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee845d042003ba03bc694d6245b0392fa33a1a24cf9a646ce4fcba616bdda296. 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/EESM12200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a23604c419f4a0381dcc2c70402d791d562ffee4aa4a0c41783ded0559905. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EESM11100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee845d042003ba03bc694d6245b0392fa33a1a24cf9a646ce4fcba616bdda296. 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/EESM12200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b339fa1f84049488286c1752f104af2b188286bdb300eb6581dcec90691f74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/EESM12200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fdeb3052662becece3d3aa601ae81f86a4452eee7dcf3ddfeade8265b5871. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/EESM12200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a23604c419f4a0381dcc2c70402d791d562ffee4aa4a0c41783ded0559905. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/EESM11100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ac1d2d5ef2eb0599b38d50648be819661e3982b3791900e3fdaf9bd760566. 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/EESM12200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8248f69e55ca1abee54678096e6f6094bba3596ec95f16349077924d58dcc0. 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/EESM12200104.