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 0xa5369b3666b1fedecbe7036fd58dbe83eaeeb9e8305f2e74b1daa73e4e6a6240. 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/f032cd03-0a19-4805-b801-6aa54829deef.json and https://artists.proofprofile.net/proofs/artist/f032cd03-0a19-4805-b801-6aa54829deef.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 0x5c13f0a77dbb03e523665edbd9939da137ec37c3258e9ded7f67abeeea139ac1. 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/USE830969803.
Moment to Midnight (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d175c5b38208c207b45e7c51e55c1bc2a5ac66782bef327384ae338f567c53. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGWX2135526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be35190533bf94f2fc0a17cc2036303839251d2e9c5b11ecb15f3b641476241. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTV32432124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b307a74be335349dbdb05371638e10e0a958f07503a1ce0f0556a3e072d1b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTV32432129.
Sunshine Heavy Industries (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1a48f6a9fc56f1a518dd2c5c761f2b268722f9807a2e02519f55eae62b3a53. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZPJ32103024.
Minecraft: Trails & Tales (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fb5e16d8965b64178a188bc8c20267aea2d02f4236cb5b309851955c07db9a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2338829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9735c3a45236e5c8e9792634cebe5f5cac29b14bdb87f674254410b0b5f56. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2338835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25d0fc58a25b8297e6f6ccca3d61c3c75c4b033e55e81c0e87d283922d62dc0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2338842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6482c4a1f51dcf96235517af58dd16a90d7ec61d046f8dbb8c2d56a2d3ce6b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2338845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d5cdbca2ec801d27f032ef723c32981b3cb4179592a576e67355b290d4bddb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2338847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b0abdbf6da35d8c01a050c132b94dfe8047f6a2ed5212cd65c5fbcc62a162e. 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/QZZ8A2338852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f16348af03c5f326d1a39793ca31005c76228826714ba98c247080d4c40e56. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ8A2338859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dab29aba884e9c13f8d29c0e5c306a38813ec3e1a7104f0dfc88ee50788508. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ8A2338864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9532d77629b78f428d23229c768eb9755c9e82b2e37ae4d6e93a5e3cb3387303. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ8A2338865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d424c8e18b5691cc0cf8bc9a040cd348f74be1fbbb54ff3e0ce0dc780c12dd2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZZ8A2338868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e270e593093e1eead6299b8f5e55623eeeb0868ee68eb4485eca85818fb6149. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8A2338873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87d29db55c008ef3efe5e6aa9384431673672d88d2037f7ee91505ff819b31. 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/QZ5FN2511456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe78462ebdf7592d765d1936e3d5a8c0d2c2ab7266304b3cbcdf76248be31ab5. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZ5FN2511458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c395b42b3d11caaf61fb5a00b9211f4ab135241c4a08ae240bc4252515f79. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ5FN2511459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e3294f1bfd5fdd8abd1af5ddf06743e22f85bd24c77ed136230184bc60421. 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/QZ5FN2511462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85fa68eefbc45a1fe856a54fe6a9f69260e03cbc5b9587b094286df62cbfac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5FN2511463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc87ea84723e4befc6300d5b1a29736cfd928d0d2a6df7faaf62948fefe63a92. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTV32572848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e3b6a270294b1b14b2f929afee98d713eb0f126898448787e9011f93f4134a. 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/QZTV32572849.