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 0x223115f0197b0c5efa04f74d462348c9cdb7d135914f5fbdb476ed3eb9efd884. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b85e0475-6c6c-48bf-9c24-2f75bd803323.json and https://artists.proofprofile.net/proofs/artist/b85e0475-6c6c-48bf-9c24-2f75bd803323.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 0xff01727fbd0365ac2a6c1ae930bb02a23b961c91c49efb36f21eee18b1c78270. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE5RL2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd93cdf88864d61a1b447d0b6ffc5fecc009c109570a5789744fbfdd430ff1. 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/SE5RL2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0260622ab2eae5b2db698b8b69eff438baad0e8bb8246fa577f05159f2d296cd. 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/SE5RL2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6a69f8d5e75151f34d7682e6caef97fefeea1e48612f1eb5493b921cec5fe. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/SE5RL2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a67d391505483ce0890109affc3cc3f747231016cfab84d85d2e2ec793e8d5. 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/SE5RL2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45d46e558441a3b4d734d1289ff95327fe7c21f19d0a85f4a0f9dc159aff631. 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/SE5RL2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5463fc10a01ac6bacb1e6712447be89d3febaccf01cbd1db0538031f4631ab. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE5RL2000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d794c36db573240f9dfe427aff8f29a519dfb6753e0f18d31a063bd7e80df55. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SE5RL2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3d9af7bfac12b3e8abd7822c1bab99cb7342fce09a9f42adc9a4ccd86fa35. 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/SE5RL2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b9185872df7be93a504e753c1dc09cc28a49b857648425a7396b7406f91cf. 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/SE5RL2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67229e28ee9dc98c272eff8b9efbd31f43d37f487acd7074c9de2ad1e22e3bb1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE5RL2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b51d84c9ecc7659dc2660e44e6335e499a272f3cbfdc66e4875e85295d15e. 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/SE5RL2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c207b7e6be7acdd061a2aad588312bd7011e8377aa1e80d493bf99bdd834e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5RL2200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4a6c9eb59478e2fd177a0700f9824f4a2eefb61127a872f7e3ac6384da1f8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE5RL2200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39928451fc01951a80680706fd7d995422d3f24ab6ec6ca6359e54fc1b9e088f. 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/SE5RL2200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354d53c964838f4ff9a81a9f0cc9c04076c98282354f2462f631b149353080a9. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/SE5RL2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b1c35ab383f37f01c9e3440ac0774de09147bb01484c996afc72da8e06c49f. 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/SE5RL2200209.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b5271591ebdb009b37055f4bf89b52687508ef9244a90f7e9a24cafb24c6c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/SE5RL2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56343ac4ab4e9c887f53ae1b51877c5236cab07045821795675cc2e3d04bb9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE5RL2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a808ebd5823f072b319434f9a6c7f3f7b45634448560c292d454fc77eaf6c. 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/SE5RL2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9630bdd5ca60316f6854828929894b9dd4b4578ed8f3ecdeaff0074bffe173de. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5RL2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbfe75a283370923ff05493917baa9faff2de549a637df552b2754ab2b17310. 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/SE5RL2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498c0d3ee2fddd14804f46ee00784586e5649d8bff23d3888c0d993710ed7514. 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/SE5RL2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e4e6d912c92fce7c5a0b8da7f8f9f8095a721f5894f24f2ea8ba8de6d91c43. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE5RL2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c90dee68d9761e5e2a00e36adf452c1ca3c38cfced9620774dd30715bf4430. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE5RL2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba155e3dc4f43fc8bf7a9719e85250f2f674d8a69f01371fed1aeb7ac9fc5193. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5RL2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8eb6658b8c238b0847741738b6578275778efc83a777fa91af7a3753789de5. 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/SE5RL2500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc974a67fefb55ad1e162f651c3aa0a141880ee174c64ac523739c697495f7c0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5RL2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32ae19f12c45f5564e639863af396ba28e2b7754db26b2eb50c3544cb1225fe. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5RL2500109.