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 0xf568fd6ecef551ca09b3554e0942bea9e84600e74ca39d49832d5ca810e12185. 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/5ff94b86-c1ca-4dd8-8ae8-a5906649e589.json and https://artists.proofprofile.net/proofs/artist/5ff94b86-c1ca-4dd8-8ae8-a5906649e589.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 0xebf20ddc220b0b6e12f40e5038ee7c8f7c6285025ccf6a057cd32d5b63e8fa7e. 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/KSA002303422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6178bc945ca961a38636ce7895c2c711ac587b124d80106de8e6897117e25d. 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/KSA002303423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac6b7cc2ee24eb1ada9676d276e2c09c7976d712402f4d9003509a8e760f15. 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/KSA002303424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02750d5048893239d2443438046c2428852d4f78c4d4a557022879a4671a698c. 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/KSA002303425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d6d93cdb3bc86153e16d34d2c91257be78f9fd2df3171e3842090ce7c98f64. 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/KSA002303426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025cabb0b912294f88a1b9c2574a6239158feed0b337315723a10f49b622146. 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/KRMIM2359546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c2cd87f4b405c67e72f01d86235dcc9b1e7dd2a21431815ae9901409bc1e8. 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/KRMIM2334833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc8f6b6e82befe9fa2b64d1120696e8fa33c7579901cc49cb715fcae4714c7. 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/KSA002101661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ba978c6acd9fc5bf7b4ca7dfd32fe24accaf55808a7e517659d738aeaf508a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KSA002101662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddfc478f82f0906b90f017ec08bc09c86e6cc4919304200365a9abb0c6d701a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/KSA002101663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a39ab01da5fe2ff9134f93eb5bc1407db29468cf1fadc2af18da5d750f064d. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/KSA002101664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2257ba6540d71037a5fab963670013b0e6169fb5fcaf99927eae8828c354fda. 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/KSA002101665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f9d2940ca65147ce341dc4688ac93bc196c83f999ca82f322ba6be2085135. 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/KSA002101666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634a89e4a85eaf9dd2b0c6d8919b94586e1d8550125415cbd8773cf438c609c. 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/KSA002101667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe121070b77ae9041f8b88e316122d98b076fa3c0d7f7c0616c323e8ee0a34e4. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/KSA002101668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c3c574607140ca159999dc199287d757c78d609a7396b32e524a617ceea5cb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/KRMIM2125302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ef6bdd167c15e4ee0374755856176fa60c6a292d071c79e60bd90ac41066d. 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/KRMIM2116765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed6eb2eb083a61b9f20acd11f9f9dabbe90397f8919c04d07fd1b26be3bca43. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/KRMIM2035636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134d63ca1653a2f1040d6b1ec15d7d78b36a514dfaf861afba9e33729c3aecf3. 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/KRMIM2019506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969bda1f9b241acb4e3a73f0bbfad61e51f9022a1560ec3ef7063e101604f2b6. 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/KRMIM2011974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901a5acf6af051b2c13b84169108006f7acc140eb830ee84a040e7e5de41b93. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRMIM1915837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87352b8b8fd20f065fe20980945a884ae065f05c939f95ef2701459a8d58439d. 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/KRMIM1915838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa430f541e13c190cfea6b391f664710e3d683b406fecd581acca4674ae724801. 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/KRMIM1901280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16055d437de3667e8e4027bf5bfd93f5942ef8022450ffd807cfcda51bd135e. 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/KRMIM1901281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91ec1437ae2b159bf7ef0d1cfc65eb971a072ebc4c723e820346d219797f968. 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/KRMIM1901282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de9fee0111d2bdf826a55b9c612945c8418e00d8f489dda6b467a0b927aea5b. 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/KRMIM1901283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86caa6b095ecfa5b919c29368feda19cc28e7dd779e5fae3a2b83a8aa97f138c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/KRMIM1901284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a0b813a078fe0046422b6ebf4cac6438debe44a2378a134e802a97a8bb392. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/KRMIM1901285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8336a36b09528f8d2cec847b4cddb7fdc712ed461bf979e773d1bc40d86951. 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/KRMIM1807703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9005ba00dd6ff75da92cf8e055433d974368c8e4711b740367fabdd0fb77f4. 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/KRMIM1805200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f7d63ade23d064024d854472fcc7074ae9f5803fe706c7ec7a19022c1c353c. 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/KRMIM1801780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc1811a1ed5c269447de5eb6c1872f7cc12425714bff50f7bca38382392874. 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/KRMIM1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83493fa3b80fa1453c55572a36caadade5f837fb38bdb8e5b69212ad8159610c. 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/KRNAR1600722.