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 0x54b88eac6f6f638bdeef015bbf0f92620c9e3b4b6fa7ded8a828dd5f18ac021e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92ea72c7-ca3c-4aff-bf7d-107b90a25071.json and https://artists.proofprofile.net/proofs/artist/92ea72c7-ca3c-4aff-bf7d-107b90a25071.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 0xf677d29e4faa6ad1ae6347197a31fddf27fcd49f6365e2d65ad65dd1d4d705de. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZN882567125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639899e0da7b1af09c4a7daa31fafbaf25bb598b4ce87bbfe7213daa8ad31477. 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/QZN882567126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd5157a2d9c67db62331d2c979a5d70ab38a2e2f1c572b866bfecdca051961. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZN882578472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3104dc852a62d0704285a7f08915c8ff7b4a6f050aad2d0ee72ab1fdec58078. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZN882578475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bebd32cb1c1be190b7b07baf21419a0e7358ff9775e6b9a2b9764e8900be70a. 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/QZN882578484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a7f4263e88ae300b8072fbd84c161feacc6f84ed4ff7eda9bad4144ac91bf1. 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/QZN882578469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855e6362293963b1e0cbdc39fbb71da02a6a16c821671029a335b2181c48e85. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZN882578468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ce259171028a406745d2afcd65042531127e21452d6170b40b04c3caef1219. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZN882578492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288fac513273d5e8a1cb804481596611a0eb478ebb2e2a245c2d4451e45ded43. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZN882578466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839bc0163bca52d7c51f051309bc5da3509d32742d41a41506fc6a222e1abc7e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZN882578487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515c45d73960888141ddfc89c62f9feed276008877aa30c8bec628a55335583e. 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/QZN882578449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1859c189722bd2f197093393742c41f5fc30492270b074a003e03d342d5f84. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZN882578491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9760ccb76cf3daaa2486173e0d386706d06120e86522eef9df12238677d87e7c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZN882578485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e2c500692243289c5ceccfb29ba20de2f7dddf1202eb49cb5248ef0a46331b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDW2518775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec611545ae838169f85852c9065330abc911293363acd49cd200676ae6f2eee. 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/QZWDW2518422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446278fc9f8aa0ded2fb9f41a6d73afe5f3711761d8a4084a353d51374b30b3d. 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/QZWDW2534250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c2b556dca4800723e70c07e13fd7b6c6298eb3d7ed69b8556e250de726c3ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2306862.