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 0x18ace1b943dc5f64f2ad84f435b3c0c3b9e5e5b17e9a3090be19c286b6881bdc. 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/89692f00-77d0-4409-9396-55dc762b0a00.json and https://artists.proofprofile.net/proofs/artist/89692f00-77d0-4409-9396-55dc762b0a00.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 0x3baf961ed96d9a11fb62ad5fc8710395129bc16a259ced3a0efe522f28806350. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEV2286995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7488b0680949c5af891d96ce8ffe5ba4a3e40a29653836ea28937e43174f05. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNMY2212304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616f7b377d1f9c6a448b51d8bddbf3ea255689e0d05fdb0921e6ce393e782a9. 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/QZHCR2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe94f0c4b1e25859fef84176a7089fbf3fde940f0deca4f7e413e46cd4813ad4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNMU2377183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2aab9dfebf1fe7aed14245e9327ade307f22490d794e54572aab2f59f36ada. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNMW2380100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c912fa76546d28672a94fd3220bc89775ee9a2a85c0ce20c77cc36ee866810. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2411907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432d8692111869f2c022683a159222487e1126459596e24cce6e13ea6d362c18. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CA5KR2434539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e4be97d3d319911cbd73c599362f326c3add7dda55750a5db0abbf567d37e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2446531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d9f9ed6bc6718874720adb640e98a0395eb520e814a4addaa066627e4be1bd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CA5KR2446533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd6afc35a961ad4a11f0e9959a32c7768e16a0e07867f8218dda4e78709180c. 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/NL8RL2428027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68b36ab155e1af9e74ad5de4bc9d3241eeab02e3c6a46310a29d5ea920aa2a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2481426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4720195fe494eadd33aa040880d39508a34bcf90b03571e86f729f86aa065. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2506104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b16524e1a421efeb988c7a3e09bb2f7db034f6320951f06ade7f884e0dc4a1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZS7J2525375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616f7b377d1f9c6a448b51d8bddbf3ea255689e0d05fdb0921e6ce393e782a9. 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/QZHCR2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1efaf63856fe53aede90db8f4522decc36d65cea9f2779342e0b54f7699b4ec. 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/QZHCR2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd6afc35a961ad4a11f0e9959a32c7768e16a0e07867f8218dda4e78709180c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2428027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7568b2c4057c30e629a0721701345ef0ad43956b4db87f6ecf5b4dc7a56a548f. 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/QZHCR2100119.