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 0x1bb0f80d3c38fe6d535d67e500eb71495c808b31ae97065a792626e60f3829b6. 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/ecf800ca-c098-416a-99d3-b4cd5e75a241.json and https://artists.proofprofile.net/proofs/artist/ecf800ca-c098-416a-99d3-b4cd5e75a241.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 0x6e7af431686be26ba955b045b4ee387003e773bf6715f1b1831cf3ac4ff9fa93. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX452044482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd158434408916a474c6c0f21d325115b3a74d1d90281f26e35755bdf0108764. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:28:07Z), 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/FRX452044483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8106318ab03ab74aa777dd13de0ccbb208e007703d0927f213f1ab3c21604154. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:18Z), 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/FR96X2040164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc3a6d10f5df92dc0a9df01f4d2178d8a4a7a11d24d88eb225d63e4d71f6a3. 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/FR96X2040165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8106318ab03ab74aa777dd13de0ccbb208e007703d0927f213f1ab3c21604154. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR96X2040164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b4692e2149a5a7419033c14e48313de526dba0861841222557d1648783415. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR2X42190492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817812103d1fb5505205af79c21b95480cfbc9240c0a66245b0dd8aa7846626. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:10:01Z), 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/FR2X42190462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68e8202c8601dff500d51ea02185d3c1274a84f0c77136bd27532a41e68c63d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR2X42190484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e507814164d947a4f773141300b7adaa17ca418567cae0823108e887bfd06fa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:52:52Z), 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/FR2X42190485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb5639075103caa1a37d3e5c1dfaf0e884c40a29609f9221d1d35b7c2582bb7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X42190490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e2d8cdc02f82ec1abd73bf65b2c4fe678c0e3e2d3673110ccedb11f31bb773. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:34Z), 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/FR2X42190486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172bb252402f73ca8ec60dad3f608a7978bdd67a91f9132e60ee045a9d9a476b. 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/FRX872246489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e4c51dbaf49ce06161a2a3d156d729731e6083da3f5d4ccc945fa103b1575c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FRX872246515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6821105573a0d8e7ffee7c753de4f0f4af6c07e82387ee4c73bbece0cb743b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX452335282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dd8379ad20657ca97fdac3c3d73e3d458cfc253366bb0fa9e74919aa0ce12a. 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/DGA0M2398176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad83c83c286503911c86f41e4d99e4942b7ed99fc563ac6739467a48d844ebf0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0H2457720.