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 0x0ac45050b1bf456270b5b56db1dce42a90661170a05f5b3c04369714371619ec. 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/a769d74a-fd6e-4d81-bca1-22b92ffd0ded.json and https://artists.proofprofile.net/proofs/artist/a769d74a-fd6e-4d81-bca1-22b92ffd0ded.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 0x90d33f9108e9997536d647b530996277e73e527777adae2382549f5de8e66573. 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/QZWFM2461090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d707a30a1121ad819bdbf6471331c43f21b2c4456c955ab857bef766884cfd. 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/QZZ7Q2403503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188def14ba2a1ed675af9eb4d64fa5a9acec082bbf6764bda96cfc7f7896cbe. 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/QZZ7Q2416625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33866adf570e4a19cec6eb0400a1d7f45985d0b9d1074f8c8e77c65044a3c709. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZZ7Q2416626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7935196714735b9168d32376aa6e620e2fe677311f45785c0befea72f36508. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7Q2416627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3672420a01a5c8d98b7d8b18d0ce619d1a29307a981f32b6aa1789247d09d0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7Q2416628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e39c2ef797c3b88eb40e274d385d9a17bbb47f2b6e9bc6451d8227c61b17ca6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7Q2416629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939d696211731677ff68d3c2c7c30e2b0c9827a4b66cdfce5ffc8ab82f456e4f. 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/QZZ7Q2416630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b86e37cb249e4a79db7d447c0f0d33ba604b25fe47c211aae89921fe44d4048. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZZ7Q2416631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04322d61eeae212edd7f5726255823786be45023230d0a77b11e10e62357097. 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/QZZ7Q2416632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b3ba178a235b7913edb8cf3ec256c5f41dde83405135dbb178a5e8fbc01ccf. 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/QZZ7Q2416633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edb71f94cbac83ec13f085c687152a1f1c0b64f918dd94336c078977cccbe06. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZZ7Q2416634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f82f24bd988cbbd71f9a5785cc2ce18de5be2fe67685a2a0ded5640d04962. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZZ7Q2416635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bbef8839e82a38f8400ece07675709480c2e1d788bea4cd9f4b6162e8cc2ad. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7Q2416636.
Happy Chinese New Year - Chillstep Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4eedf92a82f3d73d0357a8791b3edca0f837ef06798a2d82e3d5c8cd77a041. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QT3F42453666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028cdd7fb40f5efa0b0c54b6f15274515144d5e3e5f223f3503e0edba255c43. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6Q2506358.