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 0xdb676b3a25f30e400e436ef45c11db7a171bb4c4153c9651a734fe63edaeec30. 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/02ba31e0-705c-443e-8264-39b5722c790e.json and https://artists.proofprofile.net/proofs/artist/02ba31e0-705c-443e-8264-39b5722c790e.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 0xca32f2bfae682e8ae53527bcd8de5ce0a09500bb13cf3dfae410e614413d7ac9. 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/USJ3V2403093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799837c5e061e386156091f010ad0e2d44a443591436b4780fc79736cf812110. 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/USJ3V2403095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5905cd462f93f5ef0ff154f499c40758a98e7d7b1afd4dfb0f73461ee8a9ab55. 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/USJ3V2403097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42dc4573154d0700b279f6f4275545120595ac69d0f7363404ced057f7332aa. 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/USJ3V2403098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9562fb540d8d2f27b9939092a840700720e36cff3e1cab59c4e05c0656715a. 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/USJ3V2403099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcd7c0be6f13cca0941d0ce1eef9ffb8aabdd3976c18aab896a2d976b54702a. 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/USJ3V2403102.
Chine - China: The Sun and the Moon / Le soleil et la lune (Air Mail Music Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf9b02c5693c47570be060fd16ac06e5d4d0d47b728bbc35c170da15ae08a8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80307301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf872ec1b752e14c41d580ef6b3f9fe53354759ffd97871ba6128c8edf84ced. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80307302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb11a79a880017fa97789e9f95ed486be3a801fbe4422365191541c67ac179b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V80307303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a81381caee11bb74e60708034567c396b104b2ce8ff3d734ca8c3fe3e788f33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80307304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c52996153e327d7aa5b6fafe7568cf0cda915ee6b3cea57c5126af42e2eab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80307305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742012843e9ec6ef5ee6f91c46fafbf02c5bb1afc415c91b072e5e8f3bb51ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80307306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e6ed817ff500542d6d324078481a51ff32871a7dade6e4d8669be44a08cb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80307307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a0b86aaf8cd9e1f4708261ecc827117ba16c1bd7bed88e5bacbff5c0ae523. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80307308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a97dc5ff793f2a0d22209fcaf47f73286c5557ef2e979dc7078ce78716d9dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80307309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07b292381427c7bdf1bc7c6521a800fb9f2915e797cd89c050b18f9a0b84cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V80307310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f646faa8b538c1b0bef8ee909ede0b235e7e7bfc818f5d9c1e3cecef34a06. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80307311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c07b442e0733fcd6903cf63008a01644ff3192bee7424291abaa624405253aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6V80307312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28280c5e7f1bc81930c753a2dd6770468562e6bfd21d25283d2a44da48af7f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/RSA161900065.
Identity: Zhongshan Zhuang, Guzheng Concerto