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 0x56b42830a1bc1bda64a2d485fd651b5ea1ad78921fb2849f072070f81539f1a7. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b195fea1-303a-415e-9550-48e8a8790f51.json and https://artists.proofprofile.net/proofs/artist/b195fea1-303a-415e-9550-48e8a8790f51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
And in Those Days Men Shall Seek Death...
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 0x01c0876eb1f8cbd5b5c239993067bddc61611d66c99a02b77d07ee864792aea9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCGH1923973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13390a28f56ff4da48c232993470b50110bf3eaf875e30547ef384b2f190fd60. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FIKOL1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3babf488a77979605d97424d4e8cd3dcaa0d9acc3709df3db3b3fa24550efc. 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/FIKOL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7436145462fc72950094bab092aa9b770014edb271dad539a31743e23a5ea4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FIKOL2200003.
(Bitch) That's What Life Is [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1f74c49f9ddff6943369c4547c2ea4bf371f5b7c9d0233252b19c6f3d0f900. 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/FIKOL2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004a368e729a794dfa402b90de6a6659f606e34e5a7af4ef7c83ee36e22d7039. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIKOL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd189303b5d42882999f0fb8acc661c8fe5c1583ec7ac425dee7334bc4e098121. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FIKOL2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040fe5c3776b8c3e5f0cc65def13e74bd3373d56c5c4e61371436ae5e2258c13. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FIKOL2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424918678c500ba26acafe7b3ec3065d4f9ae21cabd06a6004f0b9ea8a1ba5fe. 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/USHM22380630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38233a46c736e9f9b739095347099aeda413ad2da93d1acff31be0af81302b18. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USL4R2466129.