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 0xc53183b42af65360a025790e776830571db15bf93d22209bef1cc601ae556a6e. 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/052528e5-7ebc-43b0-b37a-622f52a99ab9.json and https://artists.proofprofile.net/proofs/artist/052528e5-7ebc-43b0-b37a-622f52a99ab9.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 0x1d8ded535e63ec554c4bd05175da572c44326c29a00d3c07b7eb8111e59140b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6A92146706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8115b0e32ff4ac4792e24fe7b73c5d250d7c862080d8fda81f3fe538abe514c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6TI2013713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd599866d3d3004031a7606de0210dd8931337fb47877521bf496388fd9d81b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5BU2087366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940af34c9d0179f1d01f08b6495d6272c4d00926db2aef9c31b78d3fae6fe44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5752077149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6446c06a64be36b255582e33115ecd52e1c5773f4ebf07e136636b0c8c99a53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5752017191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14db2e7d3a23fc94bcd9d5d8d8fb7a24c5b8982c4ec2de78da9a77840f07b9c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2041862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754f9495d64e9b49dc52a453e53dd06bf4bb84c8a2a651ed443f580a4834c57e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2203638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a26e0cb3a30b3b349130fdfd0a340159cb966092e7b34fca9dca8c0e00563. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5BU2131482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd12d40cd9b6e4ba7ef075914dbeaccd29bfc5550ad3cd713a4fa8faff7f3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XY2165548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa2ffb9e11c3b167c3b9b1b6f2595aa5375ccfae34f081985dc89646399bc2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XX2174702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca8c508d2af4654b241a2a6fef2098f7f4cd0bbde9d46a1facc4d381518090. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XX2120214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcfb55a2538172d316211bd3aa351c7c76fce86409596afacd6a48f335654e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6SA2199121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45898e69c5d6d43ebc0c8a461e98b24e25bc0a690b6b64891ad3228f0e44fcf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEBGA2100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6665f9213976cc43f650a64c13b2a77d6a258d588c83197485304a76bb015021. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6I32000731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6b504c6f35fd0529cf0ee76318e35442e0aaeba8bc4470ca6fa30c81a5a5da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6QE2066664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516152de065f68f200efc54c53ea9e9bc621426313fa8852111f65d73ca29960. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6I32141689.