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 0x262590e3d8c7c75f76d4b7a69d467292cf38896367b1e7e28b3a4763076e1c91. 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/a3ad33dd-257e-43f0-998d-3c84e58acffa.json and https://artists.proofprofile.net/proofs/artist/a3ad33dd-257e-43f0-998d-3c84e58acffa.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 0xddc5ad54d07a0f2ace1d7a9c5e39e8aea38400216ebd4ae4a51c7798673d9b1f. 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/QZZ7Q2448464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318560e5e811ec46143058f88fcc414529a8befa47394244e165b630b6a284b2. 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/QZZ7Q2448465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae41d25953182cb2a580d10adc57bb46160afc939f0e6ee70e1ff895ee1fb69. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7Q2448466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa318ab3f6c7d4e83b0dfb62621e64f7fcf61565a630781b9422d328438d6a651. 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/QZZ7Q2448467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b738b0c4b5b7c673d017168232b18346f46b6ed8f295da40bab1401302dc7a. 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/QZZ7Q2448468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099c53cccadd11b7d703e2d95ef74ff7b044711a2dea0ee2638c7e6eb8577799. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7Q2448470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d56c0fd80305b60c2d8448e8548d0e93151a383fc7f9edc0e107c82356efffb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7Q2448473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d728c738a3380e8e5a2637eaf9b3dfce180fdc8e716c0c733a756c8cc36190. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2567582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3600da177a6fbc1786a6122df7893c4ab8fa8ad3373e20444b0bcdb1b8c61e4b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:39:22Z), 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/QZFYZ2567583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78a5393c99a6795ab2f1564c65646c9c3b9c6066ec2439693217ee2da6d7d65. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2567584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f9842abd535a8ca6229e5f50d3296b090ef9e283e1ef7471e5251930503be. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:53Z), 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/QZFYZ2567585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45915d5ff51c16f9aed037a6e2ccaf1687bb40edef9a9a5789dee83e9d803b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:45Z), 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/QZFYZ2567586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef262125ac3e4ebc948426ac33c40af918c903e156b0285a21dac3583c717b9d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2567587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff43e707aa34ef24c6568e4d8e9984f130b6d5257b56ef963221316ddc5623f4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:58:13Z), 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/QZFYZ2567588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93309ff319774d256230d8bebad8d92693af31082180b25be00f24db4875877f. 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/QZFYZ2567589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f31ff16b1fa3419abe5a8f16bf6cfdc1ea7d7e30f32886baf92065deb2f20. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:53:27Z), 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/QZFYZ2567590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367663aa2c54f2a8cff65d1b64f3b99d3742d3a1ea1cce4d4ef71e6d46e43621. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYZ2567591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82526473e20cbce54318c1832ab81c8f5ea365cd10714acd10c1dc5a27fbe4. 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/QZFYZ2567592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea729d7323e41bd71df2e3b85fb962fe076c35c7ef1c1f4fd1fa3457954ad9d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:47Z), 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/QZFYZ2567593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4e3d5f77302d14b3e3ae077684f053e189a8176bdd461610ad0a03a39fc56. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2567594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e286041bed32dde47f0476045c2c42b7c986bb8f2d2e163af3eadefe3d027. 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/QZFYZ2567595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9974d9ea47f01ac41a810c3b6c1f0d12c2785f81b7944db3c3bc6728c652b8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2567596.