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 0x5c078e59761d5b96be460cb33f929d467bdf817ac8c23d08baa43beb831403b9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8485ceea-643b-4cb5-8307-7c026ef10bb5.json and https://artists.proofprofile.net/proofs/artist/8485ceea-643b-4cb5-8307-7c026ef10bb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Massed Mounted Bands of the Household Cavalry
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 0xd3aeea40215a43ce6cda8207bf480e21a9bf460952a14cf3b6b1ad0527631ee3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWDL6014804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe9e338e878d06a792026a4ea75e095a1123f8c1b01cff59ad33efa694ec17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWDL6014806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbaca3f080657119240664c7569717fae0d5fa047122115500c0b3b847864d0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWDL6014807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a58c82bb6752d0e3c42be6672860d66ed2de5e1cd310ac0b1c7a602cb5d08. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:27Z), 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/SEWDL6014809.
The British Grenadiers / The National Anthem / Escort to the Colour / Grenadiers Slow March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229663f58d9dc224cd9218ed8e075f86b684707ba6a536acf43677b18259397e. 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/SEWDL6014810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c692f4428725ed32e3da0ac122a6115904b176a25ca8c89a0e52131666d6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWDL6014811.
Garb of Auld Gaul / Scipio / Men of Harlech / Figaro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9324a0d95fbd077977e4c03790bec542f3b8ddbd1242db0fcd2777876ec9c41. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEWDL6014813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf07a30833b34bfc4efdb2e544d7967fb2df2fac79f65bfd2a859e4c02680b1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEWDL6014815.
Hielan’ Laddie / British Grenadiers / Rising of the Lark / Milanollo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed2e9279d01679266190f55aa0590786dfad9ee5dd3a54178fd839e2d62c45e. 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/SEWDL6014816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ccc2a3330ac1d41e1b13d614f3f555661419ac13c10a6cc06d2b370c3aec9e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEWDL6014824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940fdec2cc33c069a73416ef8d41d8d6b59187a5f77dbeff1598a1053f1c1310. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEWDL6014817.
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