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 0x4be21f7e86fcc785f5ff4765a5d11011044a69659fa3d5d9f7bd31a43c317ab1. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db4d6bce-3fb7-4936-bdc2-317bd7f7ae33.json and https://artists.proofprofile.net/proofs/artist/db4d6bce-3fb7-4936-bdc2-317bd7f7ae33.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 0x842caae3620db0f5238ee8cf84ed40d7c939fd0f5dc4ec4b78cc16356cac30a4. 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/QZK6K2466713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433597786c619b6bb28c2f08a51fcabf02da90f3c34bdaecb7c5f59cb4d40957. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2475506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a9eeb27add4166b515e414177385e44f80a9baa312892cbc9b80ec624ce95. 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/QZMEN2453365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6974fdb8f854919efd94db8cdc0ef8fe1f4cc4a5cbdfca39ef4cf85c18d3ea5. 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/QZTAW2439564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f980169d3e2c0d3c4fa32775e805eef7cbeee1dc37db48fdcdbe6f6e7c803c0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTAW2439565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b74857c03d41a0f91bb1a2c2373a086afd708a683a12f4aea78e043233ed15. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAZ2447530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9a6ed5ba5fdfd1bd8417467ee60d9ba41f816f6b3a10e66dc1bffdb806cf7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZZ762462092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2385f03699b2428f330b2d7eaa825667ffebceacd4073fbc001fb5a82e6ecf3. 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/QZDA82592746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa69d5d62648da06b51e4d2c1fa2a8ee0bab37693758906b8ba73afdc14d038. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA82592747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf400e6d6242857ed275ba5e76f72fa148086a626ad4760cda6b70a9f472a09e9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNB2518547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27af55bb7dbce678a2dc75205767a742f8a5f21b4ee4bb7ea75247f86c1a2bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2592185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10769796698a581a41eda2935f9ba31a6d4375718812b736b4f5cfffdec6ed. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAT2565911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d53d13254baccdd60fe8d77646ed451426d88ee070e322b895a153bf868b1. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAT2565915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a08a6082715de2496302947b72a349f01c18a26134cebfe5cb01895c74c0ca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAT2565916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a83934769aaf3cae13500faa946a833190e9ce408f1fc3d4caa76562d329cd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZTAT2565917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbb915ee74c0d2a9920c103589d76651f8737f0c88fbb78990235de6b255cba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAT2565918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f20601478dff5f30c3ed0bb387e4d5552cf334d38a7d87135e854223e27eb6c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAT2565919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd927af738ac877f070b852d7efe8122053e4c3558d3ffae7b14143211b7a0f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBC2503641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f2d00ead895b4728be9890e836bd430f13af6d80cdd291a57a585442e5fb1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBC2503642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe306dd22556d45d4be6eb907e3fc806320b29cb664729cf3fa1237cf53728ac6. 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/QZTBC2503643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c3228ee8f4cb87eadbf2e7071697a4c18079a5d129d651c2f78efbe71a78a. 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/QZWFL2586018.