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 0x91955e8f646ef0890df9b437a917c69957c88258cb203ca399a8536c5f2a7369. 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/045d4ccb-5bf1-4bd6-abb8-470d7e74f55a.json and https://artists.proofprofile.net/proofs/artist/045d4ccb-5bf1-4bd6-abb8-470d7e74f55a.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 0x11acd69b937608be65846f2016496d59bf494d621fe89c7c49733434e2b68ce0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG1910867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6682893d3a3ec6426efd34cf30e223905d65bbe8a4a9803eb31ebd7decbed. 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/USANG2058867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3602e7463cc1d1960b9c3c32e1324242921b7ee2800b6c17476e391f1a5d8c. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USANG2058870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba439732ff4fee11a9cf464362d9c6fce9ff9d4673797648aaf9048a5eed888. 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/USANG2024191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ebefca5de5cb0b0d46f10ded5eb742fd483972ba6efa11c0259b023c33c16. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ2J21502898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7100cb09c9ee95290080707826872e6a68e58ef034e206aafe4c02cfc76ef2eb. 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/QZ2J21502899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b26b937fdcb75437b70d605543c0894a7d3629d96e912676316a9d0feee767a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ2J21502900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa5629b76bb034e6f87c54d8f3b86c947ff60ebc47af80a1de1e3ae19fe876c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZ2J21502901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a9f68bb6e250d458d041dfa47d12cec26b8a98a8d6f5b124fec2c7d3038a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ2J21502904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d03de6bccc1255ee6bfcdf42cc48dc2393add2ab5f4b4d948b56fcfc5b4c387. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZ2J21502591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54411abe3f54981d7d1173be1af33a6bdf8df7bd89b87d439ff05eb2ad73bf88. 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/QZ2J21510358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ebacab24797702c084d09e81062d530fb77aa00732aaa373160695cf62bf19. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ2J21510361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a153c81b40b56ab6c49f096a27d23631e1a03da758356e6ec3f1a6e56af5327. 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/QZ2J21513888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85d4d5a10384b3808ad0d187562ed77404b27387ea20ca12f256f241931687. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ2J21506663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfcdc98ba5e9fcc4dc06574b0e69d8d5508eeca8f81b28d7d4f87e6996a829d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMANG2220040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b287824ffec05754ccd8c603ce444759d5c686e036d7ca2162c88c16a8b45. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2473989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ec3916fd86f8e8008854ddbf05d042d978a1f1727c1023c8cd2ff5c6c3ee02. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US3DF2474007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18783d0c191c44d7578d63c52b9ea9b03841d84f7a9bb239896b09bcd81fd7f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCG62000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d255620da9f8921c7395e0b507411c7f104b9bd1d0a29c0627d91c5dcad209e. 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/USCG62200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bce84e72ef8a252b66ad4bf9730bcd328c0fc4d8b8aca72c58c857ecac59ea. 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/USANG2032964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ecfa96ecdee4dfe14421a9c3332cfe55063a61901f0d977289e3a3292b77e. 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/GTA021500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227648397a06cb856cff197280f45f210f893337732013dab45a66c362ccd0ed. 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/USANG2032965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c9b72415215084013287ff52f8c7fefcbd38a9782f16d91fd8ef8e9de48eef. 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/QZ2J21505842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cafccff3b06483e6eb895f05f7bf55d5d257bd41d9523d9b3664fa66a312f6. 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/QZ2J21502766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacf3d9491131be65261cd49ffac132d9c7f729b984135fb722100dc965ebbad. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZ2J21501535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd88a17d5426645546fbd7f25aa2c488495d9dfe952a2f2816f2586d311b21ca. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLS2066411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f6f42b42e945692a5dc371c60c531ede965b7c7896945922d5d45db684d3f7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAT2249391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4396b6467c77d929c7a0322789bef8620ef72766f530edbaf841f406e565fbc. 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/USCG62100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687729d0447875e77e8ca1229a252d3e558c61554e87419a65a02cd9c9e2b581. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2481619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4bf3101c771a49609b0fd44f6ee2faf63d55a80518d1ff8bf7973dc51e67cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCG62000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e391cf7902ff4604a1d80ace6c491116260663d5f325b74f78fa6885b43b17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2386278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4120fc853468df113735179de42ddd1e76548e780cb99618b01bb6b159f4aa. 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/USANG2490157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be30fad16da37ddc26e3b9063ffe10a34bb02fc0a89122c24492a3a1e08d7. 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/QZGLS2430096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea95b8411df67b464c61db3711b308bbe0f337f4558e0c3215f5e1dabcb5e13. 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/QZNJV2434630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be30fad16da37ddc26e3b9063ffe10a34bb02fc0a89122c24492a3a1e08d7. 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/QZGLS2430096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be30fad16da37ddc26e3b9063ffe10a34bb02fc0a89122c24492a3a1e08d7. 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/QZGLS2430096.