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 0x4fbd7631c9dc312054b4ba49fc72b22af6d9b45181234ecebfdd316911430158. 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/0c091e8c-d77e-4e0b-8455-670c9309fdff.json and https://artists.proofprofile.net/proofs/artist/0c091e8c-d77e-4e0b-8455-670c9309fdff.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 0x00dd8d10ebca6bb97029f50f995c36be1d5fd66c1a82b2d46bf9a93c362d73df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA072349154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16362be988fe08d82280a5cc61459ab054c6128ea3e82c2844f3687ea0d22217. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DGA092357847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b78ae740b1cf01d54771929b3cce3fef6c9c502030ee3d66757e12a24be0ae6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DGA0M2335288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c361c03a1a0de5ddf448798b6cabefd26087cbf6b578dab1e3ab575e2b66e1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DGA0H2350996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f6ce31b68834ffecc41e2331aca91798adbeb8fa1beac7e5b470d9c9c8b44. 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/DGA0P2357419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5338d04d497bec58944177f674b285b374d78ff68ed29f7f8c8b5b81c9a14ec. 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/DGA0P2379413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd825872b05dc7bc34f4faffdbcadbbf80440c8e33a340877847fc5686e246f. 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/DGA0Q2378848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c9b408fc80f52057c1e605e3c90cc92b6bbd0446dd08554004d39d420401e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DGA0R2330165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0eb0d312c4b750ef4fea01a049fc9b566eb9758050be092078243fd5e19527. 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/FR2X42451632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4acb9761fb5bb48c91fb8d0e905f2b292c9320aa1b4286f05bf009ea968226a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R2467354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b72e83ce81fc313766cabe63e202ca49fbcc3c3db25eb8d0f77d61e60a87ac3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX762488190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acfbb967e932107d9e671e9b2361bbf894b6f0ad382d91df21c2f28fcca23ed. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FRX872401614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe032f0a324e34759b4db42aa3ee829595f83d4c9891589e1033cfc2dffbfa660. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FRX872447785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520b27e29265960fa48db16c1afe3dece44ae3eaba0b79cfc1ec492c834392f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRX872447782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8efb24b824ca58f634609c5bb8a1f88fb8ca27e6e82b48357d2ffb01dad433b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/INT502403188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88111ffabb2015188efeffbc9b0d97ecbec1ab5244351069dcadf10c47313b32. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INT502403190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96114a2fef6de9e62ac3c9693e5a6e8ef73b4a46f79b311648d635e224e01e8e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DGA062407934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8f175929621945dfd7bcf1104027606119ad489a57bc9557d902bf593f5c0d. 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/DGA062474542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3300b4f13780b383ae7b966ef8c1ecae15334d88a3a9b195fea6c210a51dd0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA062497774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc7ea6a45fd3c61debe2a8aa35f4fbd6814d53d02bb4cdb931e6d4569c735e0. 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/DGA072424451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cb822e4b9d509cf4233b1366d6c5269bc8f2970e720522e17153064dd51c18. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA072492711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b41a484b8acbc5318c8e7124f1eb1d67e89977a2f245a2949b428ec8d94a7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ESA012402806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f52ed82bbaf6b5c85be2bb4b823bc6abd5804bdeccbaa250f0da6dd0bf4e8f2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA082476280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be08435464e4c112d99b3b802fcf6758b642c9260eb9e14e4f074540189ca2f. 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/DGA0H2420056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57261351810eeaff6b0b251a12f52e95cbe6577f51855c294a64e244e9d7554d. 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/ESA012470906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617f8db07438d7ed9cc5a4778411f9e268addce81ea625b18a683a8ac27c55f3. 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/ESA012478765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16f35215a4cd493e3cd188a26c049bab49bbc6cd05f7704b31a729145400ae. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZXLZ2408555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a2849e7bef963a91a49ba1836fe6762cef0954533abf8298e02874cf8b775. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/INT5R2500358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0d30771c97993ae8d895e1319b9c887ce2649162bdcfb5351873f92602a16. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/INT5R2501819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd7f132e30de9c78256806908bd9b00bf22fcec08789cc8e9a149c86615afb8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/INT5R2501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4a4a2e9e121fa4f5493a91bfc6a0c3efd5635e5303e0ffe202ac17a8bf2b99. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INT5R2501939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671428c35313eb464a57155fa45520dc0f2ce11647e6e1922d4141a5e17b4d07. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/INT5R2500973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20ade8fbb9fd1a31c979146f90ecfabb1db7bbcd508fdd0f1aa8c0d9ca3f44a. 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/INT5R2501969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502f56fad66881e24c3e43513bcb3e25c0d83fc2b4301f98d65f28a16e178bce. 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/INT5R2502053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75ab0a8d9b2cb0610e6860319a5ab64427295f93b54194aa7968dae5bb3785. 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/QZZ762547522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeb2a24b3ddbf612f121d05cb85802322167240a886bbb8d115545d2a3214a6. 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/QT3F62559633.