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 0xd18eefd46633fc1288eac60a0cabc893741847b397b0fedf53422bcf4d9dd59a. 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/82b23386-dd98-4e11-a3be-fc58e26a226b.json and https://artists.proofprofile.net/proofs/artist/82b23386-dd98-4e11-a3be-fc58e26a226b.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 0xc4ff1173790e6932fd0476fcc5297f02392a1b6e33a83b0b41650481c79beb34. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCABW1439290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceabe1ba8c5601c0d51e190ceb94ec6cc541c0d4ac11daa6212ea9cb2799741. 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/TCABW1439292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630e3a0fe58e2c51e3137dce2ec790c28bee2c75c1c7ab79a5b56500139f734. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZKH70000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331b8595d4aab15713be8952a09ff004efc6c6f4d8e8ec78ec1a82cca0fd7dd0. 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/QZKH70000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a336420ec51846b9cf38f15d3acfa1c0d84003c9f53ce85c7aa88b4ea52e0. 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/QZKH70000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008f59a124bd2025f0e32b9dfeb98cfe184af772423a343c703d3deb8fa8b5e. 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/QZKH70000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cc00a008b52da991b69567faadacead2171cd94414e02802671379079bf844. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZKH70000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe858e185d7480763f2c692b72e4a60dbdec06950bb2b65ce49c244c58aefbcdc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:04:18Z), 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/QZKH72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1dcf41a460ae9a0a6ebed90b7da6502df4791aa79d552faf9290ca1fdf40b3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZKH72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51b2fca2f0dfa3ff920898bdbdadc62f2f885c43244db4a050a18bd8efcba5f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZKH72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfa5a48c18a9f375326ea8d0b7e2046c28fe6c17515b9d1ac1a99e6e72d6837. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZKH72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8b51fdbe0eb12fad159e64ccc34a4d21e7ec2172ea51802384359b00a37d6c. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZKH72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fc10c14fe3b605f0ed14fae9f0165aae6ed2865714295a973020fbf2594f99. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:02Z), 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/QZKH72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95210c900480e4bd2bd99f5df14b07e6246ff6d02cd383277ed09205c5dfbbbc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZKH72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20363ae9121b98bccd5bc1c98927e27b6b4a646cee159a288371374de7d73f85. 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/QZKH72400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243e1809b0b7d87948c32214f56d4467715e9241456627804cdc038ebeb80d4. 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/USUM71709611.