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 0xa78ae8f6148cbee02a66428d3ca1d3ce4210e3a66833fe6f713eb719f2e8d1bf. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2934fd22-73c4-4f67-b461-d71da990059a.json and https://artists.proofprofile.net/proofs/artist/2934fd22-73c4-4f67-b461-d71da990059a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mediterranean Soul - Contemporary Greek, World Music
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 0x735e578fe49603471fae4cd29cc960a281f5e53be020246eaaa2ee327df04a68. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM90506376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27772434458899f8fb2c6dee2eb820eb80c6a33d0dcc75b4809afa6dde539b6c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM90506381.
Passion - Gypsy Kings, (Spanish) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc8d25999fa7a9d809078b22a7d36c6d2af99847e279666ab3e9684f060ff1. 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/USHM90506389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17abe5f297c87b3b8296edabc579514bfc2b49ffa5eb069aab3e87ed17b7aaa. 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/USHM90506391.
Mediterranean Soul, Vol. 2: Contemporary Greek / World Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8daddb3976fbb79b0f5485b8721b9c3fdfd9c824edb29d654596eb182f1218. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ARF412300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce569d829cdba0eb48e2fe88d05ba63dfc2f6498bf7ff54137bc2b243fa0ed. 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/ARF410400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b482d2eb5290dbbc2e4638d21b723847cd1222bf2f110bd66917880c15f36cd. 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/ARF412200229.
Chill N' Flamenco - Essential Flamenco Chill Out Moods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce569d829cdba0eb48e2fe88d05ba63dfc2f6498bf7ff54137bc2b243fa0ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARF410400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce569d829cdba0eb48e2fe88d05ba63dfc2f6498bf7ff54137bc2b243fa0ed. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ARF410400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce569d829cdba0eb48e2fe88d05ba63dfc2f6498bf7ff54137bc2b243fa0ed. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ARF410400006.