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 0xae7885566a15bffa3be628e99250841ce622d2afd548b0abae77759e8f8fa33b. 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/f547c69f-b47b-47d5-87bc-7f7eef10b1b4.json and https://artists.proofprofile.net/proofs/artist/f547c69f-b47b-47d5-87bc-7f7eef10b1b4.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 0xbc3863f17e9ca67112a08e1ea462731c816eff5a21775506e8024de2e8e70fb5. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/LTC370100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e1684d35cdd8d7fee8642aeceb8aa1debc68a44bc26b23cdbb6bf94f23c86b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/LTC370200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9b841ae295b9dc1d03d5bae4660788f80e18c57ed4a17752ef32766bcf6b3. 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/LTC370200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fffa7fb5f2e5273a487fa6dedbb05487bb6edbb3694a1e0a30146d22bd2985. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/LTC370200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e236beb3a4c7e5cf6c8faa5f507feb3f77df2ec83a2f0b0e91641833c7666. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/LTC370400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3480da69c545c2bf78ca0bbe06cc47c1151c6aa8c9036466e794deb7c6b765fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/LTC370400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58523705c36d7b57502894e87955940b10b93eacd7364321369bc97bf472778. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/LTC370800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e333e17536e8f7002fffeedf0f4e2b475bd814dca67dc0d7fa9bcb1502cff. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/LTC371300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d4b7492a0a6685c89dc9d17cd2031c33b3f3f5d30ad459b8745b9b7ec902f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/LTC371300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7340c189a6e2d8d743eefcecebeaf3a8cd8642b545e61ca8aa9a18e1ded8ccec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/LTC371300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968f28a3848aebd1ee301a86fa2e3ef8cc15552f80eb96dce009d49e17c971b. 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/LTC371300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdcbc1e10752cf316a9d8d6c05ae91aee165afe478bb92c6292219351a9e66e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/LTC371300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859dc52a09f91a2648f91481e7630582bb9ee11736e12d15871991848d4ae234. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/LTC371300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac8142e8e13a04085c333c593be6fb13e0863c0aa73cdca2d6d315e40ee45f6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/LTC371900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bb0ac23fd0d08b5cd04adee9b28efb0a027986fd57c196c79ab250b2f2416. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/LTC371900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a583bdaefc52cbd87999592d42415192af711774c73c14575cefedc08c9f16. 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/LTC372100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccafedde64e0c38ea1ef2a9a4ef8b6550d521b2333b5678ad9aac9c34f5ff6fa. 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/LTC372100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2a1703d9afbcac68917f2012949c7ffbb982c034b6cc9f9ee1252dee4fc92. 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/LTC372200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5eeb459f110a8bf17db342868fad548804695ed38d4811bb521cd3c0b417d6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/LTC372200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e485581248396638bc69ab253cc7614939dd00e7cd9970902d833050cb2d509. 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/LTC371800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946b204cfbee2367570c682a4595113697157d74b658a63cf0b416e8078a7af6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/LTC370700017.