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 0xce155c049aa0c6280da44b76a81e4b56ef0f3fd7e1e3d8f083fe14cb7021d0b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5aea8b8-9555-4128-8207-c93d5586a260.json and https://artists.proofprofile.net/proofs/artist/c5aea8b8-9555-4128-8207-c93d5586a260.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 0xe355f410c2e8ab3ad4b3de6b84fb0c5d6a950f79ff6b03a0fb624384e82dde01. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOWND2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c535ba6f3d356b6d0818697e976f7682377eb28777ec727325f607c622936. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOWND2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eec8648b079095fd8e49c68602a4bc3636e5ea2062944eee4855673823f4ef. 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/NOWND2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf0c8bc4db7abb682bb961bb5842a6caf44818f4e96977835d4dec4308a2fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOWND2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2624345bd93947df357cfc815e3f573371d32478c0a954dc7995dca1e682290. 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/NOWND2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85740f3a6fe3845a9ab4d20b5cfb8d10b8e70922141309c06843d7e7bc8947. 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/NOWND2301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5206550e6492daa9f421c1ad50eca22866def86add1840f81beabcaa2fca3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOWND2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61c761f673d15a6e33c3e80353e14846066063ac3710b2be2169f09d6bd4eb. 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/NOWND2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ab9347e1c77e3970120bccbcddbcba996c09524eb76a07d46b8acc7adb6758. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOWND2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe355f410c2e8ab3ad4b3de6b84fb0c5d6a950f79ff6b03a0fb624384e82dde01. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOWND2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06394de8732b6d0cacacc8f949c604669f9873b69e037b3c5fd3fb8366d760. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOWND1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5206550e6492daa9f421c1ad50eca22866def86add1840f81beabcaa2fca3. 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/NOWND2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eec8648b079095fd8e49c68602a4bc3636e5ea2062944eee4855673823f4ef. 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/NOWND2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f34d5ffb8ef829bbc9e9d5fb8149d689789d120af841b52f9f0f91618f99f2. 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/NOWND2201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681f661180fcf5a64e394d8b97191502a38a50995f1fbd0af9ce2aa5e0bf5b04. 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/NOWND2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf664fcdfa5aa07b467e5d98a2c056ef2ed6a87eb8fb8d6e6ef98321298a451. 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/NOWND2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0632d7c518607ef450eb77a7473448501133c97ab7c0cde1630f131827d2b1. 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/NOWND2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037a502229918713a8a2ff754790bb9f96e0b85f4788effefaaf88306606d462. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NOWND2002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b291d0c870aec86e2f7bf72a21b0843697ed682eecbc7c05b7bfe3c81a8605. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOWND1901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2b8d3103450e958c9b88c4c0f8dfb60a1fcaa93bb0ca26b3d172b90ca2833d. 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/NOWND1901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b7dbd6332b8bd02a84dc50d63bad17f6988e34ee668030f13f051fa0327f2. 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/NOWND1901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b7dbd6332b8bd02a84dc50d63bad17f6988e34ee668030f13f051fa0327f2. 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/NOWND1901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06394de8732b6d0cacacc8f949c604669f9873b69e037b3c5fd3fb8366d760. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOWND1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80a0fdf8980c7b5ea62fe6ff10dc611167c92ac31de3d6a887d4fd6ba3cbec9. 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/NOWND1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284f3949c455553fe460dc52d4f965155be9f2297433bb7a305308d4e910dd58. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOWND1803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55396f21889bc41daa1b77c193bdbc11aef130ce0e7f5c9e41de1f5a7c2defb8. 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/NOWND1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a303e80733f27df1efd363eac17fbd104aca70646b813017578f16c01942dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOWND1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351637486ad3081eb164a07cbbd34d953ec535d275bda984a4bb833415ddb1e. 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/NOWND1701010.