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 0xbe6f10b748a9a2c0f5cc88ff642d613a22f656eadd10dbb517bc593f99433736. 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/aa5f3db3-e188-4183-9d80-2ce59ddc7fe0.json and https://artists.proofprofile.net/proofs/artist/aa5f3db3-e188-4183-9d80-2ce59ddc7fe0.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 0x809bae1e1dd6b936895a87af54469957438eed80e69b669a5c049462fb2580e8. 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/DKAZA2200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fef8648e2d0e1d7c8d0affac17f1bf0d7267e34dc44acd1a8b07c3a2a7c88f7. 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/DKAZA2100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64814e14dd0569cf342fa2b4d2e476dc8be280effdad27df3e8539b582e4348. 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/DKBR21900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84c3f4440b306598890b525c63f5a7208c83bc714df0819518aa7f1b3da5e3d. 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/DKBR21900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6212093e4dd0dd9cbea5c5030af67305b0c44f308db4ffb9d292ce3dedd808f. 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/DKBR21900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425528ab8082a6e1d2a9c9beb3b9dfc3c141fb0a11088dde195a19eb16f319eb. 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/DKBR21900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03ea10a2837d2fd47a1600485a10c1deca84456a1c126d46d98b6803260be3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:38:02Z), 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/DKBR21700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d61b9f28fa537cbb1bcb13bc8ab4f65b01937111abef70409610bf933a9311. 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/DKBR21601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829f6245bf750a93874d1df87b93189431047acac24f3c95684e41d397d1cb4. 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/DKBR21602801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7fe4f6bba909d5a71310c256b2f7e49f378e5e7650bdc55f7529334dab3f2. 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/DKBR21700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb57c20fdae373a338944e705a14692da898dd5873cfe7a5198da0e8eedf11a. 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/DKBR21601102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e854aecad21ce31c4a29cb39e6c009aea498475ced07bfcb3e27b03ba97ba5. 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/DKBR21700806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829ed7ed8a846b2f0459267b4f99f9bb1697df4e0dd824faab1545b1788a081. 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/DKBR21700807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4aaa4fb4c53b129c6f889bc6aa4fa4caf9bcb90d3eb7d6335b55f3a8b49023. 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/DKBR21700808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9f0b0f155650b280ecd6b875ef40cf16c512be27086abd63dc914a88d5c759. 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/DKBR21700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c06c0759d3da7eccd2a1f871bfd74d8a1530ac70efa70e17cfbcdcc671841e. 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/DKBR21700810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c57cd8f8c2bed30a10278b5edd0ba440c6b4d4317bf2a28b03be998a978ba0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:32:02Z), 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/DKBR21700811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3672834fbf78594cc893916f11de0780cf17b262516f86b659c83cd822386a46. 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/DK1U41400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd163bd518dc18246fa3ab83ff7915c623b9b4388c563bcef0200c658209792. 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/DK1U41400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829fd4fc9091d34cfa1a1678229f3cb2d6e8fb43ecd5077548e77efb6b9d5e68. 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/DK1U41400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5fddc78160aa95704b4039ed6c8c0f109c828dde49646be4ee6b610dc1661. 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/DK1U41400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b092e3e64951f49d1ce793bf40e36e9918b033d42fab68d2598c2e03484b18. 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/DK1U41400311.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7900a2ba38294e05881dedec51dbaf3d7c76918309c3c130813f8a2d2c0a1501. 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/TCABM1372831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeec366dd8705bb7afe674ad7e8144467c43bc3d4fb45033ffa2bdefb708c793. 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/TCABM1372849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040638c19d218206da31927518f44f5d526e31a1740a1be5ee2e998f6e9a69c6. 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/TCABM1372823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f70e7060075fe92ed7c9ae8adaba316a26d3adb344eba6de5735a4dc9ee44b. 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/TCABM1372851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584a8760c25d30524445eef8d62004d3d914de079303bc68371c3770f2b5bcd. 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/TCABM1372839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b0e30604bad93b1eee3f17e0a89f59c8a601b9694e3a3ebc91089aa68a1544. 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/TCABM1372852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5417f10ecd185278ea96fcc7a5c98ea65a18cdc1a41a3c99d574db0f9a1ac9. 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/DKBR22402901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373aa93149bd53d9fb5b72244fcb74794f650dbd4521782187cd501a9d378945. 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/DKBR22301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab5a4b0792400cc78525ba343c1871862cef749c0ef5e873176d21e24e71ffb. 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/DKBR22301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51c66bfedc45c0cce4024a7d96b59f8cb066c5dfc3327cdbd32d75b0eea087. 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/DKAZA2200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec9ea18853235bd1416e289e8a6c384cdf2aa4117edbce641f494b985fa6418. 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/DKBR21900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00fe07768b8772f13a5dd6f8e25755325397125d09d1c107b5ece56c91995c3. 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/DKBR21802201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764197da7910710dc98ee4f13bcdaeaccd8b892021e54f1db559427d3b6dc468. 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/DKBR21800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b001a4fad823c07970dd9ca419b3f50631e4dd58e1128930dd37f834ac4f134. 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/DKBR21702004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bf2d22eaa13fa877854fe5fb399f2253844d91cd1bd2d66e83651efd47844b. 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/DKBR21702002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1ab38d5be7e003437e25b073ed05223dafdaa0bfa733818dd3cf5eedb57464. 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/DKBR21702001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ead8391e77bd62107f1509da533f5410db0f7373845a29ccc6b24395236a542. 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/DK1U41500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5c76dbd36f61ec3f269485dc0fb434c659f2e4fe10dcaeca54ef4f904df96. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DK1U41300101.