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 0xa49a37912b8d8f8c9b210beae4f62a8766cd2f69d085f38d91d4785fce98a7b3. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c322b82c-dc4f-415b-9487-2a49751c811e.json and https://artists.proofprofile.net/proofs/artist/c322b82c-dc4f-415b-9487-2a49751c811e.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 0x656e15a607d5d80e38b2ff45f7e7844d4355fbcdbada5fc9da64ce5ece839402. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPZ922104023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055536060db2c9044311e17bccf69e710fccc3cccdfe9c52d389de35e5809f1f. 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/JPZ922104024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505b2dd553c04401cef3b96793913eff97ca2dae8124e2694e08c80f6045014d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPZ922104025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10c77f006f04d5a624af0ea7a9343c473cc484a959a2c1b8dd2d1c53decda27. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPZ922104026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6d0a3ad82bd5e16188c174e9236714313d78385e6c2eef3e8ed6c5f29bc11f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPZ922104027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd22c8ff0720887cfa88466facce4c2df17dcc10c0facc5e28c68134ab754b65. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPZ922104028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac934b60072da6d155d68f7791a479322a72414db394a31ee7ede6f7c370c262. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM4TW2489042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64ce042021ef1d6151a09e8734d4e405a79df9640ce304f746e7d5dc35e7fe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM4TW2489043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0249cddae556b255517c1591b93f5ac9d268b6c0f3a78aa82afb395781396e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW2489044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8574f9713ed08fef61d4d6d24af1ecf1271be7c7e89cac1672b669769f7ad00. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6N22234180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982bf9122a55ec50c15692234a3ce89d4a446ec1c400e23d66c1c651ab83be0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6N22234181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d20f1b063b567b787dcfeef7a6769a285bdf4f1184c251bee63b8f714617ebe. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N22234182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c2cc638cf7192b8d355034ffdcef5989c023baae13b08b700e0547f9519ea. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6N22234183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710872edde33b3623198743a8f85ca8530d188600bbf546ce434f6a1986d0cec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22224313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055536060db2c9044311e17bccf69e710fccc3cccdfe9c52d389de35e5809f1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ922104024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9f397df118082ea3b99b862aa133608c121443a281619f349b47d001bca72e. 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/TCJPK1915748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b173e4b2fa839c00c829aa155a40621c776cbc87de05070c92e66413bbb01a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCJPK1915749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b66f419ab833fe91fabe5be4aa5fc0bc41faa5b3d787807c75c94ccd3090f74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPK1915751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe5ff466c0a98f7172823058190aaaebc6892a1f72175a65fb5fc14a7510d11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPK1915753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace81dcf2097d2204e95134d6ac908ace82b8b466a906012d11ddda79fffb6b. 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/TCJPK1915756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e33bb6fcee8e35bc71caea17b98a41dc930863489f9016c4a8e762f54c1b721. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCJPL2056763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80010a3b21e89e760c60837eacb473634ad501d63db11a69186cb16b82641093. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TCJPL2056769.