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 0xef71f1c0aebbab5b68afb4e5acb6ec3f73c47179ca1a54cb97c7973674844f3b. 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/e4ff0b34-589c-4dd0-93f6-137190d2477b.json and https://artists.proofprofile.net/proofs/artist/e4ff0b34-589c-4dd0-93f6-137190d2477b.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 0x11e1c7783fc2ae893289d0e1e68004c6278db82bc7c1bec1b6f1256ea2257864. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLZJ2585017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1dcf4172f506bd55a143a1880acefdf1f1fd7780cb5a6a7109963fbb9f9f8c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:43:04Z), 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/USLZJ2584996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44851bf82521aa7b31a05a755aeb70acd2df15fb2c15f638c84fef5678db7d3. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USLZJ2585002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123a52fe0f003b45f97c247ad628cb771b23df4262335de1a884b7fe09b7b99a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USLZJ2585006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ecf8f21bc146b7da12b276a518a52636ff023178d8140e6ba8bdb2c5ac3101. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:38Z), 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/USLZJ2585008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe664e1e8a74c1fa07193a7015c52e6fed56ae209e24afaa8f7d32895d39df697. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:07Z), 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/USLZJ2585011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1e4c8fe310abbeefa6835a91719d1a6ef741cf11a9ad43822627e9f79fb35. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USLZJ2585013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0fe3e92eea06c01e9ac40ab64adbdf738396c2990eff53123d4897a4fc5796. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:57Z), 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/USLZJ2584441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5199de0927f12caa179b3edaa1a98561c1d3bd6cab9ec242563a82b4c725d0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:10Z), 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/GBRKQ2530552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a03eb11816293556b96ed177ef9460a75d63f551cbc17a13bc4813027eb7b. 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/GBRKQ2529487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0926c1330becb9c0a058a7ed71b8b95e6f3c14895474de697ef08f22241eb80. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GBRKQ2530553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c0b2b4016b2a15c70f21afee8d30bfa15dfeab79f0dbabf7c7c0e2b56dd26. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBRKQ2529469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6104f5c0de9c9ab5907d7d43147d9d3f9d4c004f0ce000a6b3e893aea848df62. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBRKQ2529467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62412c9fca08192ffd0e472ea8740a67f51c98ba3d9b07abcd97ae8a16edf81. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGW502570220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c56d5c92383aabb6a7d9a5290b92927c0ef01b1480288ab80f89c440070537. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:16Z), 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/SGW502571078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bd284d0101b240d3fd5b700efeb125b861da81f6a9833920c29df049fe97ff. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SGW502527223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420e3a698fd1a3eb1cb67c43ccc8cb6267a6bdb48a69889144f529f0046c1961. 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/SGW502562391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7538475417d80797e7642f165e7c41d0a0924562262daeafd9fa8b2dc7a7c26. 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/SGW502529224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d9855bd1e50953936a9af46af35ee4372d7e11ecd4c88af91abfe4125a79ca. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/GBKQU2533172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99830e557e5aa2ca357e47f441405853a0a6731f045e7938d5a387644b21f8c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBKQU2533173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e439a8cdbd296e7685186675d1bdc523a312b38356b25cd352e92c074375c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKQU2533175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a189da1404cf9a4b41ed9d814731d41e7fb30b35f41a4b227e644e69061f7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBKQU2533177.