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 0x43f98bfe21f7a6e2ef7202fbe7b5a77fa14bc79c492f06691cf6519a3a07d84b. 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/fdaceed8-ad08-4f05-9e11-3b9c64157b20.json and https://artists.proofprofile.net/proofs/artist/fdaceed8-ad08-4f05-9e11-3b9c64157b20.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 0x10d046a06e4c0631482c2d0d6f95b6cc32fa1d92d412d9efa53bddaf13ff3aaf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42331619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406b05bf399404e34dcdf60f1647938f2d11fbb7cbfb5e810cd77b3f97c36ee. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZNWX2323932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1abf57d36a60ece8bc65c015daebcda5f1939a8a20140d5e3832ec8f4aca31. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:12Z), 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/QZNWX2323935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a15b594636241d1af1a5b729b519d5f544e430aa8720de7478f7aea37959628. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFF2317279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e97e742ebad328a2dfd9f751226b85e5eafd1b4647b57cf47d121a17a315a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:47Z), 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/QZK6J2405102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ec5a442e14dc7e5936e881f3ecea674e81780cdef48113d9ea3e840638af6d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:27Z), 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/QZTBC2448462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9f5e4efaab30a7572abc06176bb949803cbbd780a1fa236343334611adead9. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:49:29Z), 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/QZMER2517762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecf3f20d4db746d093eea7583623c776002a7b57e15a36d1ae5eaf91010e42. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWY2574863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7da615ea55fd0e2ce8bde0d63e0418781ff780f163fc97ff87effe27e6f9fd. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWZ2554976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af06a184f55aa32e06c1e4348a2a07acf5c9f29cbbda40808fd5ee2cdb2a5e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWZ2554977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a58c451eeec1337d72cbe5aad18404a2933806b86b4d482946c84579442909. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:20Z), 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/QZNWZ2554979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd59233c13c865734ddcb426c97440bb51143256e62b2582c71e1d7fdfc43db. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWZ2554980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a7e5d09716feb7fe3e1da36777fd5acde808fe4d2e9a897fdc2f469fcba8a2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:14Z), 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/QZNWZ2554981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10b64449dea4662586263d8f4765f20735f103e15287df475c04e060700f46f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:25Z), 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/QZNWZ2554982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d492511554cbd80a08f5dd51ed07765b840f5455a8943e79b21e8568ff8637b. 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/QZNWZ2554985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8525343793aa48bd1eafe8405639bccb530e59873877461d1805d37986121404. 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/QZNWZ2554988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a24063362edd77f90e68294aa145094ae094ee338b01498016ceafa99949e2c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:47Z), 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/QZNWZ2554989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655199e5b97f28d1e74d7b4403c1aeeeb2003f6946a771d9cdc880655b9cbba0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:14Z), 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/QZTBD2556247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51bed05d6cc515e01a2359e52a2d5ab2202771efe087b02881a588d3123eda. 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/QT3FB2592041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6780cc2070b41cae72fe0e11c6d7516d6b657cd819b8244fa73c54541ad3a014. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2485985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b237ac2bfbde15fd24de8a5c03c2b0850cf5d0af8df06e4ae671fe2d78f368. 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/QZHN32367909.