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 0x2d5956016e9f126100a7875ac06ecc388f4d4d95730bff8057d4353d6fe3556c. 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/a2d4b577-b749-4560-ad53-3ea3127fd6e0.json and https://artists.proofprofile.net/proofs/artist/a2d4b577-b749-4560-ad53-3ea3127fd6e0.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 0xe02bbd6bb4f8dff06ef6c2a8a651ba450a84ceda9b6e0e6cd227ad2d0bcef4b5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKBLS2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a8614386c7c121be20891c7a76910b2e3e93a4738ed22eee508110967864c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBLS2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d752d76a6727cbdf24a450e5515505c9c5058b08f41b205ec15e375fca7a79e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BKBLS2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb2ad8ab1646f18175e56a3dbfcfb157cbfcdeea97159ccc51216a4e1180e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBLS2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e6479c3dd1e811360dd6a80513cd5fe7708acc1bdb780fb0ce0c3c8bff3b3. 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/BKBLS2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a486d96fc4110de96a50155430ac9d657fa0386052066dc560f049208986c1. 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/BKBLS2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e6479c3dd1e811360dd6a80513cd5fe7708acc1bdb780fb0ce0c3c8bff3b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BKBLS2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea307f884c9f7cf5d95e7ed787276a4ae91e6eb32d0ea85cc88e9894725e8b8c. 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/BKBLS2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b743337e9473bd1913320306a37a3331ee511584826f038fa33a09552f27e72. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BKBLS2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58963ca6752fba14680999abb454c0018367e1aedd6c719f7e8a9594e669d8. 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/BKBLS2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59dcff9bc81fc2495228a312ef9254a5c972c35bf264dbd5cbdbe7f0c9185c. 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/BKBLS2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7750912bb71bd1f4e22b8b8f75db322896618b7d985dc89076de706d178b036. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKBLS2500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb4c2747e7d514396d3479487c458d73f5f7596a7df72a5252e29b0a7564338. 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/BKBLS2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb00e8df21bae67a1ca301f971bdae120df3b9828c532d34770a348b7550a12b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BKBLS2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912d1c6ee8954ee6657f7f81a7e3e3c5d35d261953e5c0e7f1c407111249a74. 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/BKBLS2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0802909b12b53a5c13cd97aa3cc29bf47158387e7289e0a6797f7f95afafd212. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BKBLS2500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7993f7201af8d8979af61cf57ac5176c185402df6741a39a618bdde39dec7e0. 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/BKBLS2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a5c573ac4964a63a675d41f852095c7b2018f5416447752b159a9e93811eb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBLS2500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37367283bb950f6ac8efa684ae2bf8967a1acb7b17afe7b8a125a327d8f8459e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBLS2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cac71a8cf1c297d84d1100d83b521bb0d436b30ee11d85470cc72a22a51ef8. 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/BKBLS2500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8a77c7d0a2912d0ad00ecebab9cf46a59eadffe911991eb1c695c4b089fc3b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKBLS2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa016ad07dfe9e913bea66fba93afd1280f5dba39ca4824b9d8360f0f668267b3. 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/BKBLS2500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2dc4d441fb587aa4176ae543ca0e8459342c8ea632087deb806d87dc3bf77d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/BKBLS2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5a71e9ae36c46ee94cb7c532a6a672795ce0ce0f782b37b1756b1293d8d16d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BKBLS2500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a00356bc01620e087fd42e876dc721b9ae6b8cd4abe9bff8e4e4e8b817a52f. 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/BKBLS2500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a8a805128491a6937d2cfd886092231ba01d22f00795e64718fbf50efeddc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BKBLS2500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b11648597ce7295cfcb4d0f6568c5f502cf65153fb522f6c5574ed6707ec97. 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/BCLWS2404552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d1b67d593f1b431b3968785c70f1d4a44814a351d6af73b5653660c4f1a0b. 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/QZW9K2470328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a76ac56962efc213c4bbddd8b73110d184870b662144e4efa12a5f67f4937e. 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/QZGLM2512839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf853aaf9d8b3250ba2d9b2a5fccbaff7e8b6fbd67f21586491624915b29b8. 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/CA5KR2517120.