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 0x20a66028d81ac8708043e2d245e1f373825d899149a32f73f5848aaa0b95f2a3. 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/c4d9267a-0287-4452-84c4-c9f87cff8e27.json and https://artists.proofprofile.net/proofs/artist/c4d9267a-0287-4452-84c4-c9f87cff8e27.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 0x9a1a53c350f4e0d69ef150b95609a22286dcb62326b393d88aa5d960a22e87c1. 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/NLK071600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a466afb952286f24a37a5d47a45a3a1dd58517a7df7a5d7b519b6cbe1f07ff5. 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/NLK071600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b3f7072fad4d8375bcc17b46a6f7715d67deb251d21db340c7e02f62d749fd. 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/NLK071600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dfc6bf53480c4c9fd983dbb36e45c9a030cb926095d8f57779155bd0064686. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL3AD1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187de1bb2237376316bb23e957686e18b504e662c6e33e88af5959d2baf192fc. 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/NL3AD1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f848cb550628cee64b6173b9ec8ec63c7ff2dd2c7b55ed5931aa9c8068d0a3. 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/NL3AD1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53654de4fd50c63b9ae4ecbc36507db50145f1187de226d67aacfc9e48fcf65b. 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/NL3AD1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50248236c23a082f7b52112443f7f2d47b6c22e4036523d36f841597679eb7e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/NL3AD1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5518b3352ed912ce18d28efd1ee9b3e9d77a450ef7612af1cc6868323b9df30d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL4WT2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3aee1e28a668623bd93d4903916cdc0b389a67df871deb5308b00f6896be2a. 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/NL4WT2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6ccb46eef611dbe26bd74f38e6a0eabee2c012db4e6689dc3cc3e2b281c093. 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/NL3AD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0a3f9252399c57b6fa822a76fce4523bc6fac1a0a81378b2a1a6bf3bf8d8f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NL3AD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64342a3010e76d5d764a199b002a34afc1998d4bc7fd5d1d6d6ad3e85d34f710. 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/NL3AD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d6f2d64c8e1159f5606376b6513acc694b37268021e4975e210d3600313e5. 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/NL3AD2500001.
Peaceful Piano Moods "Afternoon" (Peaceful Piano Moods, Volume 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9573200275397f455315c5c9c1abfaa0c42e555ab6887fe5ecc3e716608b4d. 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/NLUM71200174.