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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 0x2742538977bc846b13541451715ed428ba8087a1830af60d7281b7d870dfa381. 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/08dd60cb-1f88-49fa-8e23-d2ec6e53cbc6.json and https://artists.proofprofile.net/proofs/artist/08dd60cb-1f88-49fa-8e23-d2ec6e53cbc6.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 0xbfb885f477b903a3b3abccb57e22093009e88d619a1a67a04e3dbd4e8e095a50. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US28B1901401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a885e95079dffd40063aa1231797bef22f84a607f35928772487febd119daf. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/US28B2004101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec5368d17ab819b4efa9da61c82218ce168c273b8636596128a8131b62466ae. 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/QM4TX2176008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323007d5003bafd3ffc36b73e4f7ed742d98f4361ceb93478149cb150855066. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMF2111786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df60f1c5950c614edb16293d94bb0e0b82df4ed465ed0288316b76449b217b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP52117501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdb5b5dbcb89a6c06a1224b49cab9e2260975012a2a211d7b808bd6a9de1094. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZFYX2298516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b08d6918fc9b735ae0eb47fa82a77cbd3cb4a759fc52c09bfb907eec442ba0c. 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/QZFZ72208209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666761988bc8de4181b94f6740260b5ca5cc66ced08719a248f39b2ffab3ca81. 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/QZFZ72208210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45df665c61cc554debc4186ed66fb8d67f93c3185e80f0ef2ac011049e5b5df. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFZ72208216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14df71bad6f44cfe4a374d6be15116886a9abc36a19c4a87be8b01fef36a0c27. 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/QZNWR2214692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b8a1c49c2467ca37b132db02c5c049c024bdd1d141a0cf72b0f43a2375afd. 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/QZDA62332697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d12ed3664e44755f9c74ce1a0265338b368d66eeaf9f90fb3e46c4b4662eba0. 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/QZYFZ2344511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3818be8ee713c6386ac5bad7eb64b70fd93f305c4d8c390fbad9bc1dcc4a2b6c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZYFZ2360553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8faf8ccdda3f1e3836eecbfe2e80e74cad1c09d94727e00a4d26f8af20dfa2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ662308955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549efdda6f1244dc22e80c04e03205504fdb192d85c28c2f4c41ec4a302502b. 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/QZTAS2433808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf358d64e5e16da46104702f1e5955c8d52c54f6a17bf8dd95da77ff14ebe890b. 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/QZTAS2433816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f5ca65f1dda81183ae37180a681500b262e51305a6eb7c8d3068e9929d088. 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/QZTBB2418007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c760e36d52b57041b91a2f828c42e9e3ed9a1954ab4866e31a5ab338311e397. 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/QZTBB2418008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175b4f261e0971b709a5f4b2083853dd6847d12fffa1e208921ce6fea6b4012. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFV2423684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5420d60381d238416f2f24ff4f29600e8ef01d24c48bc5930175322adb80cf. 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/QZHNB2527071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bee5b26095b384eb167948dfd89c60a2b7959a028e0d8451220525ddf0da50. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZHNB2527076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf31397b6232e2cd31fcb52da639c170f087e263a28e0f8bd7129fd76dcdc37. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNWW2554605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ae29f33c648041af8f8e379f7cffadf7aefb8f8113667bc0c6a80ff383c81. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAX2566596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e3af0ef8e9acf4188ff7d6015e5478f61297d61bfce7d3dde75abd809ebc8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAX2566598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c861c5cae5adcef11b9dcc8eebde1701266928b32e20dda81b02f27cdb137b8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTAX2566600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d26f15ed62b4d4c0ab422ddc1d620ff628c84ebd4c5ec7aed08e032685b16. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS632107371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e130204f8ca9bdc1fbfc408c5071d2a3b9f1caf0fe6658625bdb43b41111c4d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS672121727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc741607da7a82c4b04b471a18837e4573f02b23fba52b96dd4941465d6491c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS662298589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e130204f8ca9bdc1fbfc408c5071d2a3b9f1caf0fe6658625bdb43b41111c4d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS672121727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d26f15ed62b4d4c0ab422ddc1d620ff628c84ebd4c5ec7aed08e032685b16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS632107371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee043b77dbfa9fcd1bf1033f317f9831daf154f7b986350b9f83ebb905ac6e5. 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/QZES52272931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d26f15ed62b4d4c0ab422ddc1d620ff628c84ebd4c5ec7aed08e032685b16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS632107371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5895b32adf8bb72e3c04d4d08e4232a142a102510d5bf36b0971c35ff7b17a16. 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/QZPLS2188829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793374581a9c3871b97ab1f5cf45d9eb427185385c99512941e08c4e3b2d913d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHM2093276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccf7d4de8ba93f3c09c9334f02a8c059eb4e628c3a5fa59e632f687a019898f. 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/QZK6H2291836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21670f3d8f8d2f9a5ae7c43860564af17290729536d22abcd6e62b78fb65b6ae. 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/QZHNC2272012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35bc1166018f447900977aa53f298450c63c8b600189e70e27ba84f17ec567. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ22187766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654aca321a309d32c43debaad55f1c635a36e7361545d3a6858006f6694f1636. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMKSC1901407.