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 0xd1e389edf49d1d94a563c0a571e30525dff049838b5b1dd6c1c12fd865395b9b. 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/f09deaa2-e835-412c-950f-49d3d08d71dd.json and https://artists.proofprofile.net/proofs/artist/f09deaa2-e835-412c-950f-49d3d08d71dd.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 0xa09bd7035ad14801b5b6f8929b3f5669b01f81842dc9d9f15cea271ca97c126f. 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/BXIV82477089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467f66976b915bdabca5dc1abce7cbcc76ddcf79fe98a529e0d9660863b84bf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZZ7T2406602.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f42bca5824d594f6ed1a1db5e0f37317e2524bd22c6377dfb2f3e5f40c7749. 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/BKCMX2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1bef8660aefbcfd879e6d8fb17dd827398e269dcf74500468f1778d2bcf99. 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/BXIV82425479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee03d7333d4ea26ed9779074829e82821330b5be29cc894e443297ef406fa53. 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/QZWDE2435126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb9869bd0ec6c9c7e9e72f95d7e987381e4c15f10e9136653b3d8a9f63775d. 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/QZWV32418443.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a23ed122e1673a03dba5e9f66a290208d7ca3e5268a32e6bc43b35445c6234e. 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/QZW9K2395446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4992ee59d720e34c4f30551475dd7272d75806b4bbf402c57b10637379de651e. 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/BKCMX2500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4c6c3cd210b8ab6f911bd9bbf02344e973836dacd6dd99890cd72e3ddcf3d. 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/QZMEQ2537009.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce2d017a5a1521a560254b18c0d80632b8ced10a92ad68934bda863440a4ca. 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/BXIV82272401.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0296a54fdb78fec42502c269a60d4789fe599dee6b814e77df221e81956cb569. 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/BKCMX2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592198c94acbc90adac541e9377427b68a789d041a30dd89a187c4c1cae6fdc7. 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/BKCMX2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3672c133592fa233921a6e1b2a1036e386c32f5fb8bac00fab88e8b51617e043. 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/BKCMX2400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fc9a059dd205bd02de6b02fef21a8f95255d35d9027f961741f0af164b1c88. 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/BKCMX2400441.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77efa3864db011c65b70dcb43627c113ad4a9d40461006a5751720e66ac41da8. 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/QZTAY2406696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0d14115a0d8908e028c2266b15804e7e419848fbb6dc67e3a7057b286eafc6. 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/BKCMX2400290.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec63b02f31ffc85d07a76851fe44c9d2512089cb62ad87ad06d24196b0177c. 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/BKCMX2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee99e2b30488e7b0e2a09756dcac1330ce49258cbc5cf670b6f49e1c69f3bdf. 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/BKCMX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8d562edf0a1a6a7e520d7aab965ee04b3f0c4618fae57e2359b8ed7f4d86b. 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/QZ5AB2415547.