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 0x79404cc8756a808c474ed8089176ebc8e9416f558c9ed167f45d35786377c200. 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/01fba565-3a2a-4af9-85ab-c268bc3984ae.json and https://artists.proofprofile.net/proofs/artist/01fba565-3a2a-4af9-85ab-c268bc3984ae.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 0x0289ef3d8f9732b121a65500a69f11a29f834f65529cc0d65196d4319b3db1e8. 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/GX8LE2332187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abba96cd601e1dee75c57ec9bb98909c8b9eef72d79c33db07f0c68011cd3e0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:00:00Z), 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/GX8LE2384046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc1b97d44dc2d05cb36cad2b7000802dc461d48b166158087664cf291f158ea. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX8LE2375215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a9203cba0ced1b2d04981f286c4d608545646e0fa3bb79f9430d27d467ad1e. 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/GX8LE2351951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060bda73dfe3244ab0c70c4c47944db1859699e0123b23b7f24a881844ccd50f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GX8LE2371384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174f185b4c7bb8baeb4b5c56b1c447091925f47becc7bb266e100d8533a7f8a3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX38U2398612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8d3acac348aa9ec504acc790b2cf53211ceea4f0d3b9a9a1597b0a0c62cfe0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GX38U2347178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22da208d4fc957c47787e231643a8773ddeb5f09f3644bfa2a8af73cbea26a. 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/GX38U2397227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122ed7e50fdd55c6daf6885e2450b2da6ac4cf005a3988f8dc0d74381a48dd9. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GX3HH2305705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73f87175dfe473b2dde717d3373d7ffaf3245c83a71cd59c0a728a18929aa72. 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/GX3HH2380957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011d79931291f197d4d128955cbd127e336324ec7916e5e9fd22b95e329ad18. 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/GX3HH2301717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8593094a184f26a892a4c1a39102bc0a844fb63f3f2efd8a6c1931a9988d5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXBDS2313490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562dab9b0749f0caf288dc9fe86b9d37de669970a54bd97a4bc6562dfe698c76. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/GXBDS2376218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162869e716d5ddffd9de415049938b5e41295f1485454bd0dd5f4ede5d5f81a8. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GXBDS2398475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa7297b1434e167de099c52acb8836d875068151fc47bab33473f9421f3e3c. 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/GX8KD2489981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a734b3ee53aa3a831ccd6e4b1a4179bb962fee0b3e7643de56e4678f1f66eb6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GXF972449992.
Hear Me Now (Techno) [Alok, Bruno Martini, Zeeba]