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 0x6215e0d347f35b4bbae2f25954471adf22a470cadb5439aa829be24705c6e36f. 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/1a8d4940-1821-40e4-87bc-7e2dc3160b3b.json and https://artists.proofprofile.net/proofs/artist/1a8d4940-1821-40e4-87bc-7e2dc3160b3b.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 0x9eb9512f0bcf13c16bf38c78d2955fd0f5c39c9eb50eae50f7032474494a722f. 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/TWA472271010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa640756f805415d998daeb9cc69eb8858da2e4458c8076d3d593bd053b7cbec0. 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/TWA472337006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22768e6215fbd1bd179d50bd40be4a16d9aef871a031bd4cca3ac7e9e4e5877. 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/TWA472318003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3c161dc261128e1771263e3c776e1738f2976cd88e3c2a7331cb80dd9869e. 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/TWA472330009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae51918ace2c8c3058a05a0ba9e22bb6040fe9dd0079af9583c27c8f640ec29d. 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/TWA472337002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600213c10e2da4e6c9a73ce66d2eaf6e3fd71743cbb77b9adbf371a3ea2ad4e. 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/TWA472337001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa972e76d30d02dea49433cfbad48fa5a6d3e670cefcf917d834e3177b2f4fe3. 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/TWA472337003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce6df7e98656eb8f8590542389b7e233a386c874687c2cfac55185ed66b83e9. 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/TWA472337004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1992cd061a9d7dcc3384379fe1be78974de893f38fb179a411feeaca51d13d. 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/TWA472337005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600213c10e2da4e6c9a73ce66d2eaf6e3fd71743cbb77b9adbf371a3ea2ad4e. 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/TWA472337001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd9d6797335d14ce185d28ffb074f7b7c89fcba8e0857eac2b13279aead7c1. 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/TWA472237001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c58b21007b70ae58d068fe37e5c95f5bc53b190e853e20678414e696f3fba7. 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/TWA472271007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41848f1365c293bd1576a28198d5d9b611156ce479f90259f8dfbd761405345. 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/TWCT52106236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f11152610339ae678a71952a0d446dadf7e3b982701ad322b149f47d3f534a. 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/TWCT52105869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9f46e7901dd7876f06cd83430d36800213e3a946fa434c19bf2bbdf3c0ad49. 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/TWCT52104509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee0be4ff43bc7768c89128aa63022edef5b582b6ab0e19d540db77c96e47123. 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/TWCT52003410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4548f5880707f561559a94aca50f455e5e4f7882ed85db532d309f450c224f. 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/TWCT52002665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9d64b6f1715bcda291bb39f8f19d6a2d1167b095c9724151cfd5bc8b6f3f40. 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/QZHN72091995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716751f1019113c7f385cf3e857de339f6d1107cf204e9d05c59eeae4a04ff4a. 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/TWA472330011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f68e95abc274273bbe96a38ca4b88a734c041f0cd2b59ac0caa37e16042cca. 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/TWA472330007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece8590b50bc05f8d1799070cd0c13440c30c8ba0c88b17c67baf7293884a241. 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/TWA472330004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867a41365e53c95cac8c67d14cc05e9d18f88c9c3fa73e8700285924ee6ef23. 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/TWA472330006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3c161dc261128e1771263e3c776e1738f2976cd88e3c2a7331cb80dd9869e. 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/TWA472330009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa410395742f007bee8e80784b31f988d1a048d86a2d81a6624381cbd64c97470. 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/TWA472330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5449549e256d55fafb028aa769fc59e64e58072ca84aa93bb6b5b2b65d85c5. 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/TWA472330003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce78dbafd08672b59881d65bd594f1fd7e99edb5d7b8efda5cafcb6a2bd4d966. 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/TWA472330005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad774df87b423a332d2351fc5d36cb9dbd56e902a8a9b55e796b4bbee1fd816. 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/TWA472330008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeb003fc79cc49b3724e4ea42df58a2b950c1e38158590acfa72ddc25b541c1. 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/TWA472330010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d6d8961f1cd19e153aa53f14e8c0962fd9022949e0097e2a73206d477caeb. 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/TWA472330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a2d854d5d5a6b97fd8052c0d11167a37bc8da1fde2088b64f7997879a36fd9. 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/TWA472321001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9877f1ddd25caf38c3d0f5ce5bf787152a31bbe46173c944356e9d23a211845. 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/TWA472309008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d21ff29d7f6a6c259421a1c1670cdfd8076b89f981ada4ea7dfe8def3cf308. 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/TWA472321002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b28c9320e392552e4e41b14a38867287d5dc99f171cffd70ffbf2ad2c5b61aa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWA472307004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538a7c31b9914123c1c0c4ecccb5c801db0eb6863a92b2ca0a7ac18db6e57b20. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWA472321003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df7875c4b0f2e4e3652d355dd971d2c7aeb3f6bbb1fb71fcb89425c1798da25. 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/TWCT52002651.