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 0x0ee34753b34279d06b3f277182a4147a170c7c86758ac9e28de371d4865c97f8. 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/806c0798-813f-4859-8816-6147d6a97de2.json and https://artists.proofprofile.net/proofs/artist/806c0798-813f-4859-8816-6147d6a97de2.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 0xa56362a6e50e3b566fd7544923303b17183fbaf35d1aacd7b98ac4b771341ea9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZNMU2287535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b76fd9b495d0280e88ab4f82d572de9a9e9a01fecb3807e0ea4ed14fc614995. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTAY2244095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe2dbaa9b33ecd82650be660b566bb2490e8b5ff9fefdb8d22e45d2469545a1. 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/QZJRB2206635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc32976a6232575a1f1b12eade3f720638321088bb7fed77060438be1939153. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTAY2244097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e09bc9d737f94e25db9194516de11672e408f0827cba7ac0121fb8de6141f1. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USLD91749235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f598ec37548e3ba96b66edff9b3079fb564c27812e97e317f1e23120e6fcd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLFP2223685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d134105a03b17ad74f4d2c646898b31a1bfd49da6206d410ff6f792d96c36c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/USLD91757041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6e4397a1308e431cf63c62705b90a2113ab8d3df03a8610aa64bc0df1640ec. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USLD91757043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20ffe65b857763852b61b19c40da5ce2051657a97966da24f0ec572ea66bc96. 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/USLD91757046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9410eb47b2184582e414863357ebfddfcba90896e6878b5158b814622e3fe1. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USLD91757047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc2e50b7ddbb834d35e66a0a06d1bc0191ba27d2d016110478b55fb61579b89. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZLL92588253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ba873861e10b121af31aca05b2fbed16519b2aa80a5cd23566f454438d9e2f. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZLL92588255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7f23fe6027d2ea608d85f057e4065ea930c537da89b5a37f03c7b98f1a83d3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZLL92588256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef89c7d87bed2bfbe7140e92db16135fb6ddc822369af451a1da6ab2a8b0da9e. 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/QZLL92588257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ba9e21cdcea85fa82d496da6f12e7ef134dbfc9e67ffd76e57bb0bcad3ca36. 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/QZLL92588258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb5a216e99982341a3ce1de71cf8147b32218e016226a6ea7171a451bf4f3b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZLL92588259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8cfe965c79315ca1bd91cd199b0ef05df1de529f6d7620afb03acbabc13ce0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZLL92588260.