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 0xd70c3bd993d61802eb00db97a84332139407ae681f3457fc1531bbab166c4348. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1675c1b-0b32-42d8-b884-25841ee47f10.json and https://artists.proofprofile.net/proofs/artist/a1675c1b-0b32-42d8-b884-25841ee47f10.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 0x1b582024723d092c8cffe42eac35294cc87aa9910c1e3ffda904f126569fa52e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CA5KR2314587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3aa3752ab9f16de869b360142d68edb1ba10b9f76e400ac5b1f10bfaa93dc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:36:40Z), 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/CA5KR2314588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35762c0279a5288308f4dd1d7c1289d10fb97ea32a2f8bfd264ffa5f38df1362. 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/CA5KR2318124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4d80fe4596c480006391f51b2bcf367742784258949bf0d9380730a81ca9b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEH742301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e4829e36ef1fe93d232f2a701b002727bd3cadb1c512100b251987e02e738. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEZN82312734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64e60af973c25cdfc963b4783d423c2955298f4403926d98bdc5ae978882ee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZN82312735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d76797aed3e11fdc76896fb761365fa31077fffc80575816e1789059893d36. 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/DEZN82312736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b609027808e2eff18404f1fc969a136c64be21fa903aa35312fcb2560b9458. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLCK42232628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb1c6b94c5a79c051d1da9b25ae7917d3215964b97b34c067453dcc289c53cc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:14Z), 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/NLCK42232629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf322532b371afb79424d9f77136697b4db24a739dc5023b25872e6145b89c83e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBKQU2387436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf1cfb5e34189f96498027ece719c90d70ff541c207479007521fce87f9eaf. 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/NL3WT2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b158f38dc1287bbc9e9c809f1a0e5d9fad5cc35337b9eb4a7bb6fe7bc6e4767. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEH742326969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d5d46f21b6c4f581a556fc7b82ffe790a2cf52dc7385582b7bebbc7dc85ea. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:04Z), 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/DEH742326970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d52d90f4481a46483b45f0c3f25797346c6de8b6cca1fce8c29948a018e110. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEH742335106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d6b9bc51a0fd1323b1a5156113e106207130fd5bc15d315c7264f55e024fd. 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/DEH742404030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300fa3d600cd0a085aa9cf45ff7fb2c1dff9f64fdbc8d2b412d67f7d121b8da. 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/DEH742404031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895947d8658a3f2a1ebb8b26c27fdcb642c5355725bc9f43d47d48ef6ca4cf71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742404032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ffe362cf4b37d1d0f2e8297a0f150ee6d341cb629971aaa88a5a0b877f723. 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/DEH742404033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ed3639ebb3e528b01f6deba76101e6ba35bab73a761e02315895b391c2d24. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:36Z), 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/QZWFU2546271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8debb6230cde66d384875369cb66658c03bef9fd867fc5290caf3352b9375b8. 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/NLE802400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d82e55b15aac1683137fbf2bae678b3afff4558243b05382d4d8a2e07e457. 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/QZTH92329676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a3aaf0d9b6a74fa537bdfaf205e065f5804f395df2d319a4db9b9b55b95955. 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/NLCK42232057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46866f03d6b19d031ae2e31f9322dc69bcc3e730d95572a2f9d0ee22f6da2a4. 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/NLCK42408326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60899b0190c8cfd6d691de147ee5790f1df404df084e837f1681e4669d280374. 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/DECY52400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf21d38e1986f754227d67632b6a521933f2e8afd8bf077622df4070d649888. 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/DEH742407767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d39d9803b68e1e3edf2fffac80585cb1ed3951835aec4a160395ed85760dbae. 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/FXR752403445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c2a2b4712560874d71a27c7a4c46d12c6f7c35ec29f80744fdbdac3a968c2f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DETB32302507.
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 0x69e7b96a4277b3a15e427e7b5d8fe24141fc4d544138c553cac5eb2fb2bbbb54. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CA5KR2241667.