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 0x788547610dd49c05e722af0bf8ed262e0f407d074b7ad6945c021cfa46718fcd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8821fb85-d230-4472-8714-11b16f4db08a.json and https://artists.proofprofile.net/proofs/artist/8821fb85-d230-4472-8714-11b16f4db08a.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 0x892719281fbecc9f880493f6b506510e4900e466ebbf4884ab0472072180cf82. 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/FRIDO2313079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9f2f6cc4126576587989e5601bec41a6d5c71704f29871da4c12de087606e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRIDO2313080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e0b2d8ae380b20bcd94e6a32eb47ecca750d03caf5625163c18625c1e1922. 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/FRIDO2313081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c9bf3c4bccef0de7474cd21f4c5b55a26632bb50f339021b860b038c7f8f10. 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/FRIDO2313082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd401df1ef6b0512c84b84914ec962b14d398dc1a4ca781cbec06a2cabb1e3fb8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRIDO2313083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb4699afca276455882a3c3cb6a0ffefc852de4723ac564ba98cb3723f7e10b. 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/FRIDO2313084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b096e1f4a4dece86fe024d8d458dd746524c459a0c7f611446bb377123daba. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRIDO2313085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b5e3b5006a424f95beab4a98f8eb445c3a7f4c5e3da4cca4bc9a11b417618. 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/FRIDO2313086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca5cc52fc01cf92a739114b2ee5e756182b11cda1def286c59281521861a038. 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/QZHN52273661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b5b7532cf4ca5c522a2595c3c19a8afb047abd0a4779a5f9f103f634492625. 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/QZRP52174547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e61742b5db739adb104a9e715e2523a0756894b81254415eedff6c7cff79e7. 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/QZHN52273662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273d9d32f2ea7f1168843a0145b2ae6ee7046442db7e0a1e03797e0d1ba3d84. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHN52273667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288d1872dd2e51284a8cfaf7c863f05ef6ce6c5d78b11afbe9d669e4d8d078b3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZPLR2009295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b930e1bd7b0abb908afc84df01f779b8f0829240c688c716557ca29ec38416. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPLR2009297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e0b2d8ae380b20bcd94e6a32eb47ecca750d03caf5625163c18625c1e1922. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRIDO2313081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9f2f6cc4126576587989e5601bec41a6d5c71704f29871da4c12de087606e. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRIDO2313080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00313de40b7b1df7492594219dcee15cdafbf2f213ee78903d7e0d74598ed7e. 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/QM4TX2330849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb567c03fb074b0a82f009db0e7e48080905eaaa7c027fec3c7ed8030d2b258. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEY472371765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e83f7094530d869c2623102ce4e42fcae196c5e0328084574d1c7f066252325. 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/QMDA72270904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdcd6a2dd2cd3d66cf439873f7b87b2edfa8be9fd820f2d7792720729b6b8f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62237069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc3b1742d97f807fa8d7bba4cd6ed800b176dbe06b0fbd6219bd3cfaf51e741. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRIDO2415109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e98554113cad1c488e3647afa56f411e3a7713f19960cdd94dc2f5aab713056. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRIDO2415112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618dcb8eeb2e61aa847a1e15cf5bf60d2ce64e0abe3364eb8134704a56fe2842. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRIDO2415114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9943f4d1f7f676e87705cdc0c24193a19c755477fee4802b6bb14e9bb230e807. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRIDO2415335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417d2a419b4bec818e0bf0dad0206bb71d3099225c20b82415ed5e46e99979b7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRIDO2415336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0128e840418e38b0b527d1950a81f3ee79cc93819897ca2efc3bb5ed60dbb. 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/FRIDO2415337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b25877f350a6161d3617cac8d25e6a0027a508c82e3e2676580ccd4ae53cc1. 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/FRIDO2415339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417d2a419b4bec818e0bf0dad0206bb71d3099225c20b82415ed5e46e99979b7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRIDO2415336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b611e45deab3e08821a6482dfc57689d6642b94989b2ee90a410386d01b650f. 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/DEY472379191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5bdd0d3acb71e368f4b6caff66abbc263d3d8b14784c46b8c3f782b3a7f3cf. 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/DEY472379192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232ac3480e16f6bcb7f0248b37b3bcebdb86989c421dd4e367ce47fc768ccb57. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEY472379193.