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 0x75de3e8fec2b4cc0a6916658d0dbb790c062387d1bc8772baaa231275eb49fbf. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3aeea69-4ca8-4801-841e-778848127901.json and https://artists.proofprofile.net/proofs/artist/c3aeea69-4ca8-4801-841e-778848127901.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 0x46cf5cd70f9b7d0c2baa557de76106ca95bf7a4ce84c89fe5a7d3f79c412ae65. 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/USDYP0810816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8cd2fd6238368c27dde59b69cf8253632e4284b6b7f44f198958d3da5069e4. 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/USDYP0810831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33db86c2188aadd1d29b2b486e4646915b5ccb1cdb04f01d71aed013636298e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USDYP0810817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c101d1bd9353d517a3ee2ecfc329f6cd669434e9d58d31486128b2b0e6c20dd. 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/USDYP0810832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5e603dc121be63e017f7579e83f9c2bf08e125d3a47b9052ba08f4fb79afd. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USDYP0810818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a980af0c545a06634474f5f112f25b5b8a074ecd4e3db74c927a9cba59651. 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/USDYP0810833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225dc48819a677206340ecb77a83fead0352bf4fb2fb871cb3d49d8bc25442b0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USDYP0810819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec682044c916e652e6a871241dfd152d645c7beceddb07f640cc955c7713c29f. 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/USDYP0810834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439fe1ceefbca734b0517f747fb7644c62f5690e61f6d77b6927fb2495b84d5. 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/USDYP0810820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9703eac243bcd1acb8a74e6f7c7e49703f66af434b1e33099e9429f498aee9c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDYP0810835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cab340cf141cd4ab04d9183870f8934ed0b543b66c8d809cc551070935267b. 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/USDYP0810821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ec4e6cb05af24cc6e5cfdcef038bc706a7bc3307096d71b12685e5ad86036. 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/USDYP0810836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400349435c951c3371f61c2300156a5f027aa82ee71b6a2a5a9bd55705ceb41f. 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/USDYP0810822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74603190a2df6d9f37ae657746a574312fa7fedd05d4d1265eeaefb3b97652b. 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/USDYP0810837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52e0f9d5284cc1d08926edee3225e45a9e98cb4564c842e71c8ca2403ee83d. 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/USDYP0810823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7e8f8794e9395d396d10825460dee5f0e3298102e0d1ea4a75d27c847ad24. 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/USDYP0810838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270107bc5c15fed90208c5df9510f503bc386d57f48e3fe8afe071090fab758d. 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/USDYP0810824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9878d30a160e8e9e60af58a78d814be19b119d055257e84f141142bb690112. 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/USDYP0810839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0bdc08fe4e0e44b32af3355e62563dfa53af5c2ed2a785a84e35e4ec4602d. 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/USDYP0810825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcc9722bef8ebf4045827dace796f6bc177010a8c613b46026502cf8a99bbc4. 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/USDYP0810840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb718d54d1acbda0f87b42b78ee33ecd3edadf139ce8ab1375a7df016ae2aed5. 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/USDYP0810826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ea9e85c0caf134a7bcdfe9d63fb9de4cc853285593f708a896661023a463c5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDYP0810841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15607a9a8c22261cd8026830a8f3a0af4e6fb1e1b190251711ce03644de258bf. 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/USDYP0810827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e32c99aea1c6bf375daf7898d685a12dffa5e73b17e4d05eac8747289a55f19. 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/USDYP0810842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9405460eb95e458653c265f250a509b77b5167c63f29bb0a7a81fda919d2cfe. 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/USDYP0810843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4ea0811555dfe1cc9972795e18bbac2845d1b48e0b6fe136af753df287604. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USDYP0810829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99dc9b5ef174019d508bfa89890ac6e0956da15887747106f75805d453fb29a. 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/USDYP0810844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2395787983583bf55d90cd36d26ca507f6eae6fdfe3a30acec41a5f0d726e3e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDYP0810830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926f38a6f3054fd6593ff1d3805971bf9246b61f394b84f86bea0cc48681773. 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/USDYP0810845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2d015b56ecdf1326c683e2af0d58e0b49dea21b2f417a638d9c7a61d2b8be. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USN6Z0800219.