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 0x59e5e082011ac1788376df25fa5c5aa128bf8688fb350d6f821f1474186f7a03. 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/bf24b995-119f-4460-b012-21b12474acf1.json and https://artists.proofprofile.net/proofs/artist/bf24b995-119f-4460-b012-21b12474acf1.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 0xd6ea915cc12d61b7ed9c81b732a5fcde9cce605b013f9636c5f77df778f45038. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR96X1644357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c80abe404b4d3da57c50386debd26b400440d6ff16f16fe740e2d5381c3a7b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR2X41831343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ed14fd8415cd4e805a512a6884ba3e39c744ef42c7d01d7bfbe98411f01f28. 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/SMRUS0062810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d0c85aa20dfe9da0051edeb7e8244a81cfef1ff89fb17a384912ed4c4ec39. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SMRUS0063761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c13d37554a14f3e2986e3a4b4adbef96b30e08b554a95ee35e0e4eed9e46f2. 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/QMFMF2053359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8a753e9dea0e8aabbdfc209126d6906fe4708a6459f8497b06f95bd1db4f6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM4TW2155384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf26f62b2226621dd957748c0b20b1a693a5923c595c0a3c96fd8920db6fee37. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW2155438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fb5de91cd01b4231c053c92ff7ea4b78c904246a63d1ec9b3a45400f8128ca. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QM4TW2155442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39929eb8e2b7964774d0ca3876815601b4c51bece7a083d4e181de809deca12. 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/QM4TW2155445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886b7b78332234dacf3de80dd0d924575b232b95a8ff960a349e1754e9f7c841. 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/FRX281900538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b677a57b9aabcf8ee94fa6bac25c195901c4c7775b46522ac76e739bd5e441. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QM4TW2249840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b956608f03d9176567f64cd1c92836028a870154d2fba955c3d1807e4d5cb9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUA1D2229868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2afb6178f6526f267b3c2262438f892231a0b888aa0fde2f3903b34971c60a9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKEX32302854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d026a848c3561b35262e05f8a69443d2ab07eb75d8c6ca29d0f78ccd5b18467. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/UKEX32310828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b00a5496cc838b79bcec2408071b553e68bac7fd1ede7c148119a87641b9e2. 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/UKEX32310829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73c8be443f8421fa5cd8952f2c7bfca9e8fbd260a6bf3f375c3eb420f4aaa3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKEX32310832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cd0e4fc1c628b6a59b2d721fd33694a0fbf530da72e9c0da8e50722465ccef. 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/UKEX32310835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505dd9be33c7c90518c5e7793a58872751e8fdd8956eb89f5bb00f8f2d75a33. 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/DGA072387604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d0bc8ce3c13f8ce8a83ebbb843fedd1a9ede7871915801ad6318aaea5ce95b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DGA0M2367887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe2c42a485ce4cb2becca84f353562cf98b209680f8b022e725086401356294. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DGA0M2367888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dd12c1156c8604bd5399c73b11ad1e0cd2b5c4ba8b2aae32618d9439192960. 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/DGA0M2367889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf513ef9a44218fc844b9f8de3896cf7103d7183a6412cba2f59ca2567a2dc449. 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/UKEX32551586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e9212a4951d971d36a20dc9d3a562722aeaffb00c53775d531598333cb5583. 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/UKEX32551587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbe96a76393a199efdfafc6bc16b270d5069d4a8f8123e43f31c8ad0bdb2b39. 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/SMRUS0074023.