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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e24a1b779e94b3ac8c627b9347a37602d3c99fb80bbd53df3eb8dde1cf12b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa7fbc43-6a37-4097-9ac7-88c8c82c54da.json and https://artists.proofprofile.net/proofs/artist/fa7fbc43-6a37-4097-9ac7-88c8c82c54da.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95d82855e42f8c2dfcd93ea832a11b6e2b3480fc3951b9ac5417c47bd801d62. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:41Z), 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/QZTB32433907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c41f39355ca4fca6a963693ac27235666bfce3d1c9c715bba9a0693258f0d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ22305806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5074bd0803f130e55ecc7a3cf206104523b837a483ea4c6324ca9e6b2039777. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ22305807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7569fab3466251f211f85383e493c2c78735728ba071d0dd16e5c6f37089c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22305808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dc2a6fbcacb5abea13c11035c052c213bf413957a38db4ad08fe73e9b5d337. 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/QZFZ22305810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99499c4799418b47f4eacc81fb7b80f950ff6dd88f008ffaf5f17fd2f185da4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZNWV2186551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dcc0d486b92832985a7d4f38aea8764a7c788757c828b937c9e77fbd14d01e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZMER2304506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e3ea3d3c15bbe3d7f908caf5b1ac6a64e3a68b4539d71897bae2fb62c56fa. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZMER2304507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb777e14bfe676fa34085b0ebd1210c6d531824e8e025fb9d349c38bdebb8f61. 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/QZMER2304509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c6158baf4b84ddfe0efc4a76cc788f8cb27f62e76959608be73d3386187542. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFE2324300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dd50801c22e7ceaff50ce94ae386b6c8222ee1e6c510fce8ecf3d16ae6cb1f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZRP52421037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbaaa76475638b92b3a30f06912448d34b087032ddb729058f12915665993c8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6P2498472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb85e6df8193f8c9bda6a56aa6135dbeafc1a2305eed95a99d801869cd9a64. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52421040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487b354e5e61dd6c346a2906e9139c7ab9cbf8ffe6e015e31354deb267f4891. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZRP52421041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92aadf3b9f6e7cc7e6bbb82307e6661b7497dfcbcb1c0adaa9fcc2aaca0ae0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52421043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca6a66fb52b4c407554d95b0592eda795cbc0d03a07dfe7a79b9e347143c0f. 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/QZRP52421044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5e53022258cae219a2ac32df34dc92bcf5ffa4980b0729882abc326563964. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP52421045.