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 0x754d724d855a9890ef0e077472caa9595ae5a959cee68128261acc381267ae03. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39c5e21a-1d50-43dc-8204-0c280e3b0a7b.json and https://artists.proofprofile.net/proofs/artist/39c5e21a-1d50-43dc-8204-0c280e3b0a7b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482807bad94416dcf4a49131297c01aae690fc3d6475d2a1179dba28496d39b0. 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/USUYG1498263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320fd6a4b7f709d567ba8c886436011b58f8c3c07e35870b370a64b1bb913bd. 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/USUYG1498265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5af3bcfbeaa359641878274752df2d27b4d3e88c69d34a2a3697bd6aba4bb7. 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/USUYG1498266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8bef14c73589046e9e2cf4234f88209f88bccbf446403324d015054da0bcc4. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USUYG1498268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55907f0e660ac78dfceb1dfe6c6713f3ba42c737df5bacfcb085d545dfc65378. 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/USUYG1498269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaff6281982fda8c0bdaf1660a2a82dac003ad956e5cb25ea6fc3d0786e6808e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUYG1498271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dfe1dec0c67601e2c74ee712d5083ac545b51ecc7d43dc62524fc67f8d6c7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2467683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdce749ea2cd1aff6c5615726dcea8bf9ea5ca28f1fda1df9e0b090aed82021. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AUBEC2467682.
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 0x474b532d332ae35773195b86835e628295aa37fdd913c677bf970035a2660f9f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUBEC2467685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6bf631a4d190f81080fd65d296eadcfdec317c2f08361e858ba1f32d57a486. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUBEC2467684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7182d2748d39bc3d1261b59ffd24c5db81fe53be9fd3ed3247f47d6f7417275. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUBEC2454934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc10a91ca194b2dfe0b23258c02d9fd3f177257daa89a6a9bd9323e3bc2362a. 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/QZK6P2379030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b50cffcc80ff80a4dbe7992614cfdb2da3565f09a6fed53c385a9f17b203cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2314067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471b2cffca750d4e5a5a851755b5b66e6284f0b486d14d2b33c61e5eb362b0a. 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/USCGH2323551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a044df16b4d9cbca2d80edbd337b169f6762218a0bfc7e77800e40f100c350f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USL4Q2228971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe58f500875cc65d92d08792accadf3ec8081ea6d11a72131b690524cce3ee. 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/AUBEC2227855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ea99af15ae35e4ce14902689a928edf8c40ab83253c49f4d5703f3ed3a977. 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/QZMER2172156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c56534902207c177109988325be007e9e442a9654444fceac109c80b4e3d22. 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/USUYG1561076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002d49f65194a55c5520d98cffb0ec344abe4d277f9073dcbab2c884fa44a5f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1561077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36714fba28f1ba49bc0a9a0f8c1f18961755d34fb9fb8000aefb10e83e718f7. 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/USUYG1561078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb25b4e1bf496e7b2509be3ae5eba16880c406e02dbb869f4963a9ddfa95c6f. 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/USUYG1561079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c9216aecf00178613fe7c35321c8b24f3a76845241cc6a07a3896fe00175e7. 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/USUYG1561080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03db96b14b4f1d596ebc6bd98eee87ff7b85a932bf6312d9956e582b3c144d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82098458.