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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed58dce30d9552ca48f2a8603c81747ecf05612d08267ffa2716e49d82a6340. 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/1247a54e-abe7-435d-a33e-4239a4dba604.json and https://artists.proofprofile.net/proofs/artist/1247a54e-abe7-435d-a33e-4239a4dba604.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a8d3d8c9f09e712e288cd7a0767ffe927cbc984f8965a0efdc39c478e0e0eb. 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/US3DF2468200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c384ce75e4da69259f97bffd1a3e9056078e888f39ee6a2509d9a9ce66561. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:14:25Z), 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/US3DF2514846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c460424bc949cfe71e53e88eb0a4140e37128d2e3f98649d62f3409d9f6313. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2514847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10271bcb947192eddfba1738aad7e03f9fae1ceb7c888d2569c685a57ace6f66. 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/US3DF2514849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27f354d467ee37719c4030675aa843a55532ad57cb22e943a9ac0a8c7ab8457. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2514850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46749dd4857345bfff739cfb646762e7b031df254f5081f84ca48768cc6a1741. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2514851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31c482fc2e0e0c4a2c927cd5b101885e9e26b912784203f3f1b010b298aeda. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2514852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d535b3fa3bb993be38437fef9135072efc60fc4945ac322e7a41eeb7aa439. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF2529694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803fdf6e6209b55d14bdbb7fed380b1876fa11abd65ac4d5f035c1bc5404dbcb. 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/US3DF2529695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6316542fab6515ddd385c96a900633e96cefe73912bca82fe96f538f1dcb2817. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US3DF2529697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497e2502312b5a52b3799606ab4ea47ce321a3f9560ed57e32de7ec35bae5ec. 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/US3DF2529661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d0fa1bcf28610ca90b97be4cfbd425a16c9888fdb6d2f39206698895502644. 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/US3DF2529664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeba919926182362fa512d9fad39da4642ef30040424aff167b7c87948928632. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2529665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb21eb803f7df7c8bca53e038aeda33a28141b2e5ed54524a2b1ba87772733de. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2546025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67775df26732d6eaa70c34cd56717f5991a249ca945db4f88d255f3be438627a. 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/US3DF2546026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeea129dd972da4372207bc5727f2d83461814b07d37ccc3a34e2d251d23577. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:33Z), 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/US3DF2546029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89ecc8e4ac5b32af091da9ed79e4e38503dc5d9fe634e8e53880eeb26ca9e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2546030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeba919926182362fa512d9fad39da4642ef30040424aff167b7c87948928632. 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/US3DF2529665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497e2502312b5a52b3799606ab4ea47ce321a3f9560ed57e32de7ec35bae5ec. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2529661.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d0fa1bcf28610ca90b97be4cfbd425a16c9888fdb6d2f39206698895502644. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2529664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1bf21ee6dde47b825f1deb063c4ec7144d25cfa6c9d4a873fb8114651c32a8. 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/US3DF2573831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108dba698faca93849effd8578f252d6104e57a6df48ada9f8768af6ab48fdea. 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/US3DF2573833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6253c0af360ec199945fe15ce370b3561ab3785a9e09a88de5598d8469a66. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:17Z), 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/USANG2524924.