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 0xe6bfa6215af768484ff5cba78aa6f125bcd87efdf46110fd1769fb5027640cac. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19219906-0447-495b-901b-6212d81d6c39.json and https://artists.proofprofile.net/proofs/artist/19219906-0447-495b-901b-6212d81d6c39.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 0x260b06487f61ffd071fe8b6c9bd77719debcf7a3f9e60bcc4a7251b7d25d0e75. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWR2318530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb89c975ba389df9f3503a4d961bf12ff1bc2a4b403825ba9702adac86fdf44. 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/QZDA72340722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb05da8743a68202a3a653aa4ff1cd1fd8bf12d95a4b6befbfbb6131b7af704. 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/QZFZ32377054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9aa3fadfff79b824ceb0b48181f552a691c9885a16f73d34569a48290625a6. 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/QZHN62204993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c8f508aaec9c2efc9d4dc394434930f79c261972d06869cd9652d5d0cbe0bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES72273030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c24357be73c54efe972076711c6e9e8792d0b24a4bc7f74001e6d6f7bb8f5bf. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZRP42121730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7b3377fd9e1d300a2c409d1bae6ad3b17378af677a76f6a7bca5a07a6774b. 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/QZNWR2133848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2230c089896e538c9f49b83d5f1c1ad27a1f98f709ed863dd4241dcba2db3d. 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/QZK6J2100811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e74f37d131d762d7c2ea65a0efdc979ce50d796166c9eedc44a2375db2f2e9d. 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/QZHN82153019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a86252110bfb2ae82016d11b45f7c9d8ba1353112b7221a3ac2d08d2d6eb1. 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/QZDA72196660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4342d0e8166009e498899bc54282bf97672d6f463c72f2543132a72c9a15c7ce. 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/QZFZ62129340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c9752f66b04ee30714b4faf3720e84e37bd710e90c0bd1cfea020146fffc20. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYZ2102654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75e50aa1ed916720cc775f065ef73e179cf25c96d380a30d53b18231b377146. 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/QZNWR2034454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1c81d74f12da90694d833422054d47597fec27c8edc1a0e8dd9a85c328c059. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2035353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9665ac555c8e938ead076ce8f0ab9d052aa62159cb2c4a4312d14a04593c3bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2035354.