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 0x813ef100787254ed09f3e22301d06624c3c9e5468e6a0e0a9ab0543e6c114fdd. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de43eca6-75ae-494d-ae81-cdb4d509e826.json and https://artists.proofprofile.net/proofs/artist/de43eca6-75ae-494d-ae81-cdb4d509e826.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 0xe8f516ef493d8e77cb70d75e235069655951dcc04661fdbd62e20fa6307724d4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE2FY1400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c4eeb2fafe33f9cc5a259a204eaf39c4540484bf005903a2271eed886fefb7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE2FY1400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b5eb5ee2ea6518edd1ff394dafa9fc4a78a95474b954d01e5e0537d78823d6. 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/SE2FY1400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e79735becccbae65b6bb40a024ff900f290d839d56e68479841a280a696a3ed. 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/SE2FY1400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82237da840f26780f46d84049598d35c5a9c23be11284be0a3f697935cc461. 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/SE2FY1400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831c07a8c03e71f170e158186f4e27bd872e359017217a2cdc7270a763b75cd2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE2FY1400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3e309d40001140ff78be58c359909fc730e12add10010bf59627054539a09e. 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/SE2FY1400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4e53db58b47940de3aca6b04194f1bcf48754696406c2ab21a2904c49b22b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE2FY1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95baa26765fcd4ed048cf6079baf9f449370d97baa89b9f16a80a118c5b7d919. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE2FY1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3aaeed9e0a09d715436aeb582c6887b8e2c528b27f8da50847d956eb405eb0. 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/SE2FY1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b69d3e4cec8f22d268e0db95959bc38a5544c626434afdd09cf87e726f6f0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE2FY1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26de5e09c44c1edce552945e0c3a6f74ec44e35d67507c0a3213b2da4a1addc0. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/SE2FY1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ac090f7314d92d66bdb46d8ea1f66ea673bffe8dc109fb238c27fec5d5c0f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE2FY1900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de1ed6ea215303cb8f9a8136a33a54d4f8eb3308b39275b166b9ee17eda74f. 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/SE2FY1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e90a7243dde147ae59d382e755df7df693cb107479b40f0a74eccca1b7dc1. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/SE2FY1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093cd25f9fe5641e029c56ead213ed39b1101877b382a79de39d6342d608ec83. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/SE2FY1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58b214797437642995651104d545e0fe71757e14551e625498813bbaa0d35f6. 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/SE2FY1700111.