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 0x56bfb228e277b625d01f76102978eaf8c046b3f3f0710ba7867d81d7e36b513a. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/839a2f70-ea47-4c4c-b487-9c704026297e.json and https://artists.proofprofile.net/proofs/artist/839a2f70-ea47-4c4c-b487-9c704026297e.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 0x8460b2e9ecd3e49cc2d450cc622f67ee59b6314b5919741cb83fa085581b825c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZVEM1809339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120eff06f8a2faea26a1baef8426bace5da6462a778524b5a23b5a59797094f8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZPEW2524797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d21efd3cfdc6afe1d4d2e4440fbfc3098f0cfea72a99e6ba05227959244d98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2585797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014954fee5406e16035fe23fe82908238d67dea652d6738310b699abbe4b909. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2585798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120eff06f8a2faea26a1baef8426bace5da6462a778524b5a23b5a59797094f8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPEW2524797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcba037fd6ace3352881971851ad4234d26e468d020ef8fec8bf31382458d9ec. 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/QZVEM1872398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0f98d026311f1efe836d662edb395f5e807133fa0c0c3fd89299bb2a507833. 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/QZPEW2585799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a83caecae42de9ac2ada7d0db5c60b093f404c2d4da173544cde0194e8b0b37. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPEW2585800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee0fcb8c24af90b7894d7e4d5f4b6f94eaba0a10a8a4a185933fdaaf3d45e8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZPEW2585801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72da375890d00e4f812fa7f882822248b6c6f21ee1b999f4b143af1d944b125. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZPEW2585803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19ffb5c29f84ce3b6c8abd8b2df4fc94f876299351b09ced038fdc9af77be7e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZPEW2585805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25d8c56dfdaeb5005f9109d4ab35963d3a98e5cabffc52f2d1f3f7550ae9f5e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZPEW2585807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0fd7cbb9c803db947015077ef3c17ca2fb2a49889a04ebb94369c32bb726b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2585810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62251b9b9b30087bef23abd15eb6a78ab56626096d0fb8ecf642d3e3f3fb43ee. 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/QZPEW2585814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44450b178997dc24c42e7ea75638870df813ae6ceb328d81f88d5eea2477731. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZPEW2585816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf228987b5b73a2dfe04f2e1fcdbb033f1623b74d574970ddbf37ea450dc663b0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZPEW2585818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957390eba8ef92d55a321cadf88fb2331080dec6d4827b607cad9d32815af4d6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZPEW2585820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a4b46b16b77d198f3354b35115e6bcef7239cc0f8e4bc6b8d275b2ef3cc1a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2585822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae444d6910178c6644c2416f4cadd51236a9d41626746f17f2935e31529e83bf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZPEW2585825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce81d8b1b7a4f393c599ac11aa1205d7504920f96784d968fcb39d0e7564d9a9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZPEW2585831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9332d98b62bc10d204532c2c0bcdc0fdd878346038680069b2c466846d911c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QT2VB2503516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17940e4d259674ea0432a5be8d3a0eec942801b2f5c212b76e1f23e136ccccf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZVEM2553635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108fff880263111a6a3631fc8f5496c70d8b372c50e073cd4cd4230f7d7625d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K32536131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce94351a662f459aa4e7329260e1f1edabcdbc163a01b56d1b347fd8424d551. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K52533041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d08908e4c60ac172c31dba9e4beb6185dcd7d74bd1ea5d85a2ab940fa1db7e. 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/QT4K52559748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c2f1522ef62d4c9264bc3006d5ab52392ea7da455e1f144f2142bd2c00616e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFG2561179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b55fe694b1c3ef31a0fd52f2592c2ee54d501defa796f395e5faf86f5a9553d. 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/QT4K42567133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca08fad2042704a64bdb70587a429ef7532da5372eeb1f3f00d84eb9737189. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QT3F52543561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f1cb01cdadac803752df9a3a7bc99162eca4bbc69a03316e085a50ea015c69. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FF2507532.