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 0x54b3b30c8ec9da19c26d88d74ad187aef2306d535eaa493b102de641c5ac2513. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1182cd0-fa39-4645-b144-a4f64c896511.json and https://artists.proofprofile.net/proofs/artist/c1182cd0-fa39-4645-b144-a4f64c896511.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 0xd3bb2872c9cab381dd22e24aa8cde06f7d3e832415fed88ade186f8cb31e9325. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY41857880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e98d295dfefa134cce2a004673cc1e6664ecf3be986875a80a49560fcbece6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY41857882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12417c3f909b35aac1f1009318df83e4e4fa97556c8eb256659d49bd4731d67. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDY41857883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd73af12f546f5803545974ec60e033ca69f2a85c72f8ed8523ebb63f7a5a13. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDY41857885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29de281d73818259880b79044d1614fad9707b0d20e4dae36ccd416d511b769c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41857886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203da574d7e160f09bd1803771e23459e3c7e92ba25247e6fedcca3896dc6a7f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY41857879.
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 0xae3c75ae95111450b26e49bb67b70e77cbcc93d0aee242a30ceb1eecf9e88c6b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USDY41857881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21992e44f81f0f799ca15d3cfcfdd30538851d2286d21aaf3f5d2231fb223786. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDY41857884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dcd23fbc61cc38dd4b4647a5e2c11dc3303482c973120efdcbba5ed588fd7b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDY41857887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834d1b011022ad384cffd2721936802f69cb14534852f6c5699a58412c1a856. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDY41857888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc267054a89b6b71cecc57821a33df88eaacd4d1f547eaeb1c127c8520f2d3bea. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/USDY41857889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9f873cf0a6384d8ac6d07feaf9106489fad95f736cfbc7e0b1f290778061f. 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/USL4R1816222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01596ea350aa632bbd03931d03d23b333752c13dae579f9a3648ca61985896. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USL4R1816223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a8ec1faa2abd0417f7789efccc2704c8789c9a24f6de87190e1200a597255. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4R1816224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33492ea39ef148b66de3eee21d4f237af6fe841bed22aee81d5b5d71622e3649. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USL4R1816225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf62ebc64a6d162165963d22db3802566ab86011c83d474eb1be8ce2df15b5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USL4R1816226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8523a19aa1ee6b28574f7c44f15d85757e943d199459de461de2751517df12. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:41Z), 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/USL4R1816227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2a8e0bc8b2e7f27e73e3b9e15144b6e77cc96f8c40f21983028bc2db8411ee. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USL4R1816228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0409b12809e2ab85a574d0f48e0b1315acd0551bdfa50e0f23a058f3585caa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4R1816231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa9e30cfba73bad0863eda7b0866d5bdd5c224084d76cec2cbd6575440ec22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82012804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd664e2ca03ca14ebe3fee3b3c5e3892f462ea85080bbe20eee70726a27b0ea50. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USDY42269955.