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 0x2696ae190f5f92edab3d46b8a59f07007312718ca8502c3f8713b9b3b2601ec2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4db80ae-cfee-46ad-ab50-fcb1a94deb37.json and https://artists.proofprofile.net/proofs/artist/d4db80ae-cfee-46ad-ab50-fcb1a94deb37.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 0xa0140830cc4c9583fe7778131a5fe494c8897d8b0222974bd87969c71acf33e4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US7VG1695850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2052a4476f0b755573eab5d7e9551b5f5632877bd388017ad0b8d266c31dc3ea. 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/QZ5AB1650648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f807338999409ce523d4af3fc8c940e5b5ec6051ca8e056cd5e32cd6d8b3700. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZ5AB1650651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd46a809cb906d6c33cf6467f16da4a0d50947da61926e95a88ad216708da65. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:22:54Z), 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/QZ5AB1776733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff0d62f7c6e2ab09f16baebc5977f7a13de15162499b60168dba398e7a1d05. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ5AB1788587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a62164ba3474b5188046b37b506a2377e05099f3305e3212efecd013c31b6b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZ5AB2021319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d8082d5c700844b99df0108ccef0171d3440e1487be78c95ced415552abad0. 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/QZ5AB2047514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7394a6cd75f823d37fdc4cda214bcda4c9ea76e297d9439351eceff3a216621f. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZHZ31922490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f3e4e0e60c37ed6d8169f93f8f718a9a9f68b12c644eb75d5a6df9a3a83847. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:35:53Z), 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/QZHZ31922519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f5a88ccc83ee7c26075f23649f51bec89b30370b52aff9bc1cedadf66a3729. 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/QZHZ31922521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5ab08c6922161e48d4c591abfe70d3300c680b86f26ed43c9a0f0baf86548. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:25Z), 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/QZHZ31922524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328a8cd4d538f3ed35600061f9a541e421bc3df11d26aac91eccd559bf7dabd9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHZ31922498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25089dfb2cc696312bd2f32ed24e83f3170ffb2b6dd430c3720c9f98cc185baf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:36Z), 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/QZHZ31922526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67801456da4f82f1745efa158a2a010a4bf1c479371b3bd4ef64dffb2b3153d8. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZHZ31922528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5269c1c04227bf056fde7daa969aa5df1faa51e6affa2c39160a21877405c857. 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/QZHZ31922493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465af614e3bbe010c20a990d4693f710a04fc1c52fcf862a8bd65cd97b3a6a07. 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/QZGLS2028804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3cf034f5333d1822d7930ff6470cad5ba455ef67628a982e0407b31d5886cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92081890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97276c77cf1576436919c1fe5f694205caef8df6df69381bfc6c8ddf6e6455a. 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/QZNJW2122292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1ecae973b2981d26c469e8750e43c1670c6526db6004420b22fd443e59d27a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZGLS2232957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21f7226348ec64a1e4d40801a17321f8af30a91a8cecfe3dc291bbeae72f889. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:19:03Z), 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/QZHZ52235274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa090eab69d5fe3dcc948a338f2f5c80407f176963e13d20fa1d8321bd33f1f. 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/QZHZ42043290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840a638f711913a6cea635a3b60a60a4e785fa92f0db94777208a343d3a58754. 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/GX3HH2185923.