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 0x887c83d2ad12595c768d651ea1f36b42d1077a0bd59277bfc5a31b41b9528432. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d771fc28-090e-44b0-a6a8-7455f772a2bd.json and https://artists.proofprofile.net/proofs/artist/d771fc28-090e-44b0-a6a8-7455f772a2bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xafbfee7b9a87dae4419a5ddcad5b514d96c08c19f80cc4642e2c0d15c604a901. 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/CAM460700445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73da4fa18635b006b4b7be1899c8e90983307e59acccfa09b9b14584587250. 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/CAM460700447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced041a377b2df15e4758c9a39cb32cdd43a2912aee80abaa918ad29dde88ac4. 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/CAM460700449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7e3ed4cb87fc84d8dfebbc63fc6b3e00224329d557cbf3cc476e387313fce. 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/CAM460700450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096e86c695ec45448b898bbc0502bbffe333bf533951dd47635339ecf23d7c9c. 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/CAM460700451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f1f69e1fa78964f5c96fc1af0a413406e0b4ea1781630c71e03d0fa0ce48da. 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/CAM460700452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c9c180884a412c3682d0e0d336aa946663e5f4f3daddc69999f681af4893d5. 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/CAM460700461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf647dc80f588be7d80ee772be41d949335e9ec76124b0b4dec71f0e66334ec69. 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/CAM460700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9224d9b565ce3ce23746516fe412a40cc2c66ce6dafc61c31828e716d97ccb. 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/CAM460700476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0201cfc91f2e8506fed3e6577af27afa1f1adb150f597f241071fc885c1530df. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAM460700446.
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 0xcefcdc2e44d9c5ed8bf0bd2cf88bf1a7c22e9442574d6bc0bd33a3f69a80fba8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAM460700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c780ad11c01130b25e988d61e15ab0495adb115810b4452af115f8183ade78d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAM460700456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9548ce6fde700601c7e3a983abc34ef0419967fb8c537aceb67c7d5536164f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAM460700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9daaad18443ffd895e225319d0386f868850cd89706a43ec5b7d77a43650a1. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CAM460700477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4dfb68f1b9c87cf2008c0fa30a7f946f8aa18ece7ee2563286b2b601e2c9c4. 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/CAM460700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4eeddb5cf3da83bb989c4af7480e9b73cc30e3c2292cdf39ecf19ef6fa6dd1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAM460700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e99e36d32eebf8ceb15f02cc4a135c1e9368f2c91375016a89acbdb60a9ce. 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/CAM460700381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775bc475bf90750dc3b61cd3f91c2b3765d2768cd7615f16236dbdca19951aa5. 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/CAM460700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06daaca61c9fd9158e66fdc71f9fb68b7e02d675dc0ecbcf0f4ffa9670a3be6. 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/CAM460700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b495f58f8dbe6c3f479345460aca4aa933f3bf3e1b5b6e246be03b3436e22d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:24:40Z), 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/CAM460700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1cfc0b43460fca4dbae5b52c0fe17fa4dc51e21166cb423434df64c3c67a4a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAM460700392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6bb6698c4c76558475f26d073b784397086784298deb62337f1e606def57d2. 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/CAM460700397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a16b6d9af71124324d1bbc1748474ed9040befc4a10c25ba1d0bf547a3c1138. 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/CAM460700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d2cf52c8badf0b14c43e38a771a0c0c7908f261e7de06a6a7b2fecd2affc5. 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/CAM460700404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d678a4464ef2c713fa2802af49da3e2d9aa9d7f8a2ce22719e59f0bdd91768c. 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/CAM460700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b36082619ac238c7f098a45c45d03dcd9c840bc68ea8f9da6e9ca4aa471b32. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAM460700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38ec7b4f7097f6886af1753928dfdc407520f3b2b9a1275cf433672fbe20d2e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAM460700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9147bbbde044dcdfa60f42c869afa93057dd6eebdc4ca8a4603bd6abf2dd53. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAM460700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0a9774eeb2cab73fa222b2668b9bc1391ab5264dd6c88bc56e7e621d06384a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAM460700402.