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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 0x39a1193e7f2fe90b47b60ea946cac7afd1f36d09ce39eac781ace71f098ddd9b. 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/cea1543c-8b2c-46c1-bb22-16eab40386f4.json and https://artists.proofprofile.net/proofs/artist/cea1543c-8b2c-46c1-bb22-16eab40386f4.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 0x79f0a2d3d8a0c144cfec2808afa3063cb48799431d57538a6cf33ee390d619ff. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USGYG0600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a361b07cfd7e6f67519a31870082de30ebed6416bf9ae79eb662c96a2dc9b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:32Z), 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/USGYG0600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe62d70d0d31498541b391e9d36e7899cf544b82cfcb0715f3f98f2cd4d7c0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USGYG0600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1b1665eea07eb05a1592ef6ab5f4e0ffdfb39aac73550a5436083c384fde5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USGYG0600308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7c21f4a041f54e3ec08e929cb5c30a3499498cbc25b65cf6b4215657e101bf. 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/USGYG0600355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91623c0e9dbe6d70be1a71285a8d07989e4b3ec95273359e9133709c5d79d081. 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/USGYG0600358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9684cec4c82019b82949498aab5ee510f71184890a78d75bc546dfb5d59065f. 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/USGYG0600393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3caf68fcc9ee244851ef533b16292b53d7113f8ff6fcd238954a3f1ae9f8896. 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/USGYG0600397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468d34b36b7dc67ee400e1a7a7546d0dfaebaac3a2aec9eef206288eb81f80d0. 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/USGYG0600378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2875643a6f0c803ddd4ec99f01947aeff50550199510e4357cbfa5c3c5e4fc. 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/USGYG0600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c154976fa298e41d71db91f9d0f0042b7c0debca47b22312ba668cb169e544. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USGYG0600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf13a4e89c03a4717853d2c0c5110a5a6b1e8a9f56031d005864de012ccb997. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USGYG0600382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f5e97ba54e42f37eb32fc6b16898a67c48dc472b274d22a0b70599cb8a21c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USGYG0600383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb54962f8983800a05b7123bae210b3176caa41da44c8f2f877b57484d00193. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USGYG0600384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e4d064a5762d1b2aafb220ff55a1a8460b9fc7c9b17b984bf0fb2ea98d7ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USGYG0600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ecce7528605bc26af234bedf834d73396c4a8af5a5ce006a7c1a42a7156355. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/UKKP22400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9004cae9d6b44d36d3ba6ecc3323d1e5ccf90a55dbf263dd44e2e24319d092. 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/UKKP22400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a386066a8aadfed523eb8036cf0e24064f8f5d1fbcb7187dab7bd5c6d8b82d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/UKKP22400072.
Adaptation Of The Truth About Marie / Tarkovski
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5fa78ac61942bd8a2dd28279c694e507222b59d878569d9cf6f81dec39408e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKKP22400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff91ef24555d15427eb8f922fb15818a0c8d563e6e4a63335e34193fee238a5. 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/UKKP22401158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049c88f21fd116e8848fb2557d07b5cca9970d0dab86d9c034ac54681dc6abc6. 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/UKKP22400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ecce7528605bc26af234bedf834d73396c4a8af5a5ce006a7c1a42a7156355. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/UKKP22400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a5ffa7b953a815fc777c6491bfa583cde124fff0134f8c5214ca976381c7e. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/UKKP22400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627742e76e34285d188a7581cbb1e496b1fd7615c2cdc49a2d14fe56b5eade99. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKKP22400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d693b6983940e2d4d72626b31242f6c5f3f55e391ab31380de4fe552ec12768. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKKP22400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b443e646094f4c2d6ccf2216439234d3685251cb34d890cd5bf7c0fbd3b3f4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKKP22400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9004cae9d6b44d36d3ba6ecc3323d1e5ccf90a55dbf263dd44e2e24319d092. 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/UKKP22400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c3e8f65ec98a2cb391bb0907619c3a0a2ae82c4fba32d487bcfc93f0ef6d7d. 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/UKKP22400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283764af9d63feebfcbb549b4f8e3593b1a6702ceb050dc7ce126d044046a86e. 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/UKKP22400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e2ecb2a5905a09b31db3751e9f432252c0da219786eda1df319bed580ccac2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/UKKP22400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0ba1df9ca458dcb6b7da5faeb2581a47d84393f215af94c879d8852409566. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKKP22400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a386066a8aadfed523eb8036cf0e24064f8f5d1fbcb7187dab7bd5c6d8b82d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/UKKP22400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddd3a1bd187f01fd626b1740dd76381368430f15159db84ac7efde86aaa4776. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UKKP22400073.