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 0xe43ce4ed3e80c4ed80f98c0d3197419e012911c0829ffde8fa2638b8e3cf9eaa. 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/c81fa93d-6020-4cbb-b110-6c083670add2.json and https://artists.proofprofile.net/proofs/artist/c81fa93d-6020-4cbb-b110-6c083670add2.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 0xa19846429012799bd48076e10866c8a6f2d24077edfa90a95fd0e9211ad61ad1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91011943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fa8872e6a23171913dd00624df4839b932a0910ee9d4242a985c2ef356989. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91011945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e358a75238c0d96f77390ab15a22bbbd8f1f303afec4d1a9c54530f8ebe3257. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM91011946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1b6d7547c54511c5ac74b8906ea36a4f963ae71b0c43973f84ba82d258a374. 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/USHM91011948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1be0c7bfa975ef8be499d21cb15ce0be7ab2a14935cb3931c9ffcc0a5344ee. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM91011952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dade581e6a3db51ed1363a2e257565d2e90c15149936c9dc06459525964badc. 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/USHM91011953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa51199e3cfef680c1683129fad23e6871240da4011daf3b6830a3b8af65fdc4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USHM91011955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be840be6dc3c4af553e4add66c607322136a157c77d8aa8bb3ef2a78e889c1f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM91274250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed0ba2dfaaaa121133036029c424e871cafb463e2ece5c948af7420af3d0c24. 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/USHM91274252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1103819bbd75b4fc66a5ebed8446e769aa8654e8f87a56d181cb830c58a045. 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/USHM91274254.
Twinkle Twinkle Little Star (Ah Vous Dirai-Je Maman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5fbef276655e1a858531959e08cd838a2a288e61a6fbfb289f9426a53292c2. 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/USHM91274255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e19e620499a7975c3a91b7511fae2988431a629b7b0dd83672eb61a6f02da6. 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/USHM91274258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ecd80516d302d75876a491a3d1ea46d1242176fe509917805844cef790284. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91274259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd517fcc77f3e400fb242a2fd307cbb5b367e907cd82554ed1d06292c3b764c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH1537103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650da692b85953de2f2e161bc3ec6b5d5115e2817ccd665325c93ceb0ed5845. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USCGH1537104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8c09e2ec61c74d9dea8a4c2bd6454479293ed32c371c729d41a76eb583940f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCGH1537105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fce0f59c867c261b631b4c091e4e4f847aff7e38c7394a33e7f86319d5d05d5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1537106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78723097d3f5655851b15c05ae6a8287f2bd29b260f16edb3d2053d51959626e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1537107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690717e4db5b22c8d1c0b411196de820be55a5853324740223b68f128859303. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1537109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181d39516561e2500fab84e352da5310693ff3746c26142e070d63eafbcfa00c. 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/USCGH1537110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0c21eaffea3dea1c0b48aa7fcdc07dc22368b6fa0be33c26e11a218fb76f1. 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/USCGH1537111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4d43ce1fcd551cd25ec550058ff15f0edf0c7b6edb725cc85dd66e86d124a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1537112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5561f6c9dd62aa39a38f6b2cfec07e8889be29708f387f2a94d0cde401a6156. 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/USCGH1537114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635493298b6bc910c175ddd672b3e2d8a6cc55b78130d57ba72b988997415f3. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USHM21969407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a356f02180a7d0a160684f323d1e2f88ca24668d162daa62d21f0adc71e5923. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM21969409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37445c0c98fa22c6debd518caa8beee99b2b41714c9f1e5f0913486e557d5e80. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM21969410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe098667200e28386c6544261a9282c8b5a2b5c3519c094509b4a1cfaada9d3d6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USHM21969411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b87c9d214063a86a3317133dbeb03b25b144a3b578c33386a1e557198c6861. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21969412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eff8c940274522bc756977c4922a39e148961505d9e6334aa09c8e350658839. 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/USL4R2513290.