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 0x32a7b5a78d40260bb587d5f6808a6afdd3721ae049a4cb1159e91468b01b6bc2. 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/70dd6638-41a5-47c8-876d-14d410cacb1b.json and https://artists.proofprofile.net/proofs/artist/70dd6638-41a5-47c8-876d-14d410cacb1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Camelot (Original Motion Picture Sound Track)
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 0xd420072e84dd095ed73aff89782a4cb2e2a2d04c968fc4ef0be41da1cdff8ec5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901601.
I Wonder What the King Is Doing Tonight - King Arthur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b2ca42878b010b7de4b281cd8aac6ca8ecaf1942478244218f4974c758081. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901602.
The Simple Joys of Maidenhood - Guenevere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b409ec7039c807f1923ffc5d1d05bb216b5d16e4ab789c1917efd9b158f4c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8c51cb39d36f63201eaa389894449ad1516cf900d5ce519ff0b0ecf89cacd6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWB19901604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df8f6034f7ef4c2fcec8a12201c23b9b4f241d57ff6832537b2eb47b6064f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c4489174fa9b49837b71d1a74f0f52e33f4f7cd8f809a27c469bac4870ad2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee88f0e70beb43da750ceb593bfdb42e1634ccef54f15eea5d6f5fbfd560c2f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c24d2f9416c2213d93a71210de6143e5e5c42bd75ebb8e5ecfed1984bfb633. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901608.
Take Me to the Fair - Guenevere and the 3 Knights
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3812c86f91195d3c960ea2d502784a53f2e493cc0f7e75c86aa35e4463184. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901609.
If Ever I Would Leave You - Love Montage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5058c07df44acdf0c29adf0983e74a87a748567edb3c6bb13fff3dca177f9663. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWB19901610.
What Do the Simple Folk Do? - King Arthur and Guenevere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2cbf559f57acd5e82b37c5ca2e7009d38dcfb18665faf179b53540ecc6feb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901611.
I Loved You Once in Silence - Guenevere and Lancelot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d505f3510c66e7891b6b7302461011e6c93834ffb3eb519490e24b8402e4ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27948eb3f1b1191ef44e2ca03936d6bc2fcd700fbe89f15965ee7b34e664bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USWB19901613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86daf2898c4c5e9a9e33882f0621f2217f6ef4b1055755d83913aa1191bea704. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901614.