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 0xc1ce34a96921510c131a4f5cb4239afb5107894a33421573eae6fdc17a3b97a3. 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/ba9eec1b-ae9c-4de5-a598-555f462d5cca.json and https://artists.proofprofile.net/proofs/artist/ba9eec1b-ae9c-4de5-a598-555f462d5cca.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 0x8bf9a31618f47588aa37bbd6fa858e959d218f83a9bacf2b6fc4d15fdb9154cb. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:42Z), 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/QZNJV2057244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023bd689944b7c08b95bbe9789622bff1dbda1ea2e5abcfbee2d79c937c3a00. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZEQU2059719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63c5e73d850ad39517881151ac60988e59ed3a14d4638f285ff62a422d0f20. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJW2060667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f0594299ae34a908e589bccf6286f00961f88fa03d3c589380ec2f455003d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:53Z), 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/QZNJW2060672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4fd6f3971e3bd0fecb55f010c0111047a7f1c19b0b37d58ab976f03b5e99ec. 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/QZGLS2150910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c21d6c495d4cbf1f0794d09609f0a33b135a8d52b3f0f28dcae0810bc5e3b5. 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/QZGLS2150911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b6dbf5d75267dc5a5d1fd8b5e1e378a7b4fb199e4a6645dcc3b1272c0b366f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLS2150913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d46754839e33dd503381ecbc5f453955398d19b4d197b7602c9d2b4783919f3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLS2150915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c64e83e763a465598ab05b2983e897787195b53a214df55a530fee5be32aa4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZGLS2150919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53afcac251e3f95f6d88f544a6908f4ec405cfdbb8da3b9e78b72a1bd533ed08. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:45Z), 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/QZGLS2150921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78176d83e0dd7ecabc80b8c002043dd39be16f955621a8346e1c424f93649ec. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLS2150924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc45d9fb5d19c04dcce6d7a55c212503732d07b8f3866164200a5022dacf8e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZHZ32231378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161528a6bb750e2398e0becb596e9de74d567ba1372e7381d1c8818c04acc9f6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHZ32231379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87602614edfba3d09041a6dc52290f1aa9ca99949942f2cc952e55717050864. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ32231383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2fd62bacd3b375451068828b7dacbd0d66383479efc8934df6c5499b8e4fc2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR2X42368404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12cde9bc843b3a0bb3a5b533eef4e53c9f3d5493d9878dc1d89fd1e4a84e5ec. 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/FR2X42368407.