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 0x3a63315ef45bbf89abac5130052a23538e96e0c03d371cf903eead48a93f42be. 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/dc38ce20-ae55-4558-8930-b55b820a2eee.json and https://artists.proofprofile.net/proofs/artist/dc38ce20-ae55-4558-8930-b55b820a2eee.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 0x38d965920b0f6a4d5c1842ee7320c9f839bd27eed9931f476363518464368322. 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/USTY91400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5811b73e555181849bcd72a91c4e9bb320d90cb9bce91e0d1b7c62e8b75aa71a. 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/QMFME1414820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7685bf4bbb981a7ad1e385520438b1f8bd05ddb2a620201a6b12a4ea250a056b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QMFME1414823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3d2a555e065458d8c035fefbc00860b0caf21336128146d029323053cd4e64. 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/QMFMF1562981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d471a7b794317c6af5237e524bb77e5e26c1073c4a1f21099151fc4b520838. 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/QMFMF1562989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705c9440a83526344624dc9cf55af44f2e5a4cbde9a4ca8007541702a5df7a2b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMFMF1562980.
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 0xc84bce49a7432aea2e9b35d4b5af130bf4a4e53a115a289a8d67fb3279c7841d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFMF1562982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139aa0a5b1d799f9a01ec67454afb9594d64c0184a094d9e068d4fb06d15b48. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QMFMF1562983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e61e8005e3c5885301730034962c809ba165bf7c58ae0fe25dfe5b3d01857f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFMF1562984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0ee3c92c67f6f76e1429a80b828f10f40a908bcf341d367b4297b64a89907. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMFMF1562986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993cb8a33156d28f6ec002cd8532718fe0fa7eb0db93fc3fce0587f48399ac5a. 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/USHMD1826301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de580478f7be97b0645ff34dcc501b6f95ad62c03a921f05cfa95963eba5a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHMD1826302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8356a2bba816406916bed1a84cbaa45ce8e8273387e69d3ac90c422fcb1cd43. 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/USHMD1826303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab48f66585fb11756fc8b67391fda5df71c45f67ecd8ce9010887bb14d6d1d4. 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/DEG931901591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ea964ad6563839f97e64aff7c3c7b411531d05a12c953b17370c97851666b. 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/DEG932002999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d307808a5a2ee923e4f7ebcf8a1ffa9bda7ce5870c945a679669360ffaa10d. 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/DEG932003000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434f20003a62220b2caa49ef808ee8ec61b4682c63d8b8fbf37d19573bfef443. 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/DEG932003001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76b0dfe8db94ade47e71ea5aeb0a03f0b588f2a8c7ad3ab8eb72884188f43b. 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/DEG932003002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f5305ebbc3133358b6412a4d294825d24c8718268aa51f0120936461bf316. 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/DEG932003006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af0387b8982a86b429531291b37200166e16cf4dd646f80d7f201adf9e3d847. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEKV81700553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e515a8ddd286af74e801b8bebed0c78f6f363a532859dd845163074e4bb27d1. 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/DEKV81700554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e74f483c94d8df7c4f009c36a14c130e559cc8fa74fce052300d41f4dbed1c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEKV81700557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed23caa080bbde82bed8f3e3f42b971b2e39474b371028e392fb6fbc821e80. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMFMG1577148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65217a106b26d0022a1b1916fa653aaf2027b3bb3a63f4c34581ac862faee0f7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEKV81700555.