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 0xfe0390e74b76dea1a60feeb1b9a1b534f4eaeadd372dcde4cd5bb67e552ca68e. 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/33d301c2-a9a6-40e4-b0b2-304306df5711.json and https://artists.proofprofile.net/proofs/artist/33d301c2-a9a6-40e4-b0b2-304306df5711.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 0x1942b38570d296357b14688ab6a844cabf2611c5f78939db7d24466fe15a3665. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZEQU2063377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23fd22dc4053af9ab927ffd3905d01874ffdce5350c40147097fa0da6e3bb2d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZEQU2063383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80c06b3ac139ec3cee61b354980c9472a4bf533ec49b68c1596a755fb74572. 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/QZEQU2063386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45b7766edcca52dfdb848680440bdad5f6001ddf5a795e4e5cd7c195a1d2db. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/QZEQU2063387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc55fda5699624faa31e614a88d6c74f4c0262ffdc6daedbd37d2ef9a09a07. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZEQU2063391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3a39154ce7255bd1a461b0d8091826434cc842aef76da759117798ec2c734b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZEQU2063392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b1619f161dc45d24b58f601698923760a4e8d0c9c3d3103c5a73f2cfb4e6f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZEQU2063393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbc2dccef60da5cffbab1961ffada526de5df719df727132cd215493a950d6a. 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/QZEQU2063394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cc683007f03205d517235abe2dcb0e91295fa30e9ffc3b5691cea366c8205f. 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/QZEQU2065061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee66a3d58f0ce041807a8a4d9f42a27cb6e7df8e33aa98041118dd25192f4b2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZEQU2064341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe740e18d25bf8759bfb7d0a688660cf21c46511f6e40a10893707764af31e1b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZEQU2063488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511adbce9096ca6cdfbf30a0c3f18f06efbe761b67906cbfc215b41cfa573ff. 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/QZEQU2063489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbd6ca190f35c83f905abc623d0bddbb3a54633725b066a2dd39b7e5121e315. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZEQU2063490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181f60c7bec74920f072941d320b9a7158efcd472fd2ad8fc56b66d60edb4120. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZEQU2063491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a5425a4cc80c5d64234eabec7f15f7d33e085f9894655ce1e052eaf7b99bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZEQU2063492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225bd7987656d5d12955fc23ce76aeff239652b5d45812e532968d009848c47f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZEQU2065007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a5ebf546eb48217bd1803409cf25996dd3951e6c767d3ae3dc45b3a8e04b3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZEQU2065010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e0032b91d85445dedee8c76153dea390db24ba6d708b3d50dec75340dcf536. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZEQU2063727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d82f247e2ed8f7aa8c4789e62561bf72463e1cdf59b0bee44c053a1a078f6. 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/QZEQU2063736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc83ac5c2272710c7bb6a640f77aef608d9b99bf9f29cd5057697d062a69d2f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZEQU2063737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e7da958a8ec0477f2e473dbc50b280377ec4f0148249444f3bd49e8839e2f2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZEQU2063599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaabe424aa1b30f27a00ffc0b016263d1b5edc484febec28d06017b8eb6a9e40. 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/QZEQU2063604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5434afe73e82e9707c89a60dec2f087b52e6ea0d32ff487c942eba378b92b61. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZEQU2063607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168d32a2ca7d2fd979362f9ee0778d05fcf1503fb9f274ddef5e30f36f00fa14. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZEQU2063608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7426fb055055d8ea1030bc4c2226897621ddbd955fcc5658b69ed269ad9d871. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZEQU2063612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a367fa267f9e3d20a64cde3bbbb2834783f06d2e5ebddb5a2faa8719b0faa86. 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/QZEQU2063613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e7da958a8ec0477f2e473dbc50b280377ec4f0148249444f3bd49e8839e2f2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZEQU2063599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaabe424aa1b30f27a00ffc0b016263d1b5edc484febec28d06017b8eb6a9e40. 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/QZEQU2063604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7426fb055055d8ea1030bc4c2226897621ddbd955fcc5658b69ed269ad9d871. 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/QZEQU2063612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf862fa7da76b0fd1c8b37e8253088762e0c14b9e6abe372947e8606a91523a15. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZEQU2063645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798af50d06458af8ac94ac5c8a070283fdbd30e24cd22d3cdbe0093d0d267e6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZEQU2063647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf371060f538b01de3890bc24472ab06b85e2ddc3b1c260a7524a0729b264dab5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZEQU2063649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dde865f54da15e507b8c5b8f6413563315528ea881a7790bafc3a8c0096d81a. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZEQU2063658.