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 0x836d3bd72afade96a96b8d3e9ad5526d74c3265e6a651d6af7cc331cdbdf7cf0. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7243c7c5-f48d-4ed0-8eda-d192d103ee29.json and https://artists.proofprofile.net/proofs/artist/7243c7c5-f48d-4ed0-8eda-d192d103ee29.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 0x9a736b87c0774e6695f5ec5f527e01e93bb824d413c3ce8a22d44f3e9fec4a62. 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/QZWDW2300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062d52fe8f4714533313c396b7683e33c41c00c5a98e304a1f6d2e3409d9344. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDW2233567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be3df387cd7baba35ad8dbd2648f5a40a7e45ca87856f73481676d3929f60ea. 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/QZWDW2233671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc414c4dab0a40fe56607d1b1b458a95be9017ce098fdcfb84744f71a09c2215e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWDW2233568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114528124502743c9de5da2377a76d734ee2daff984ef56fa0ddab3d0b257be8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZN882308671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b046e0a5ef6bf53cf2dede57015f537ef700d457ccfec957b6d99206174d9f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE62M2298894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dffe40536cc2091801803d86c1d8124637309b7f6a744dfeb637600c1d6f2a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6SA2226068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf626ce89ad8609a920cb2efb018b6e0f64c300080fc300b4b6b94ef48bccadab. 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/SE6SA2266652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027f4e87de5ee792315008b6305d50856960522742a0856ff3c4fefaae4d5443. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE66N2383750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f23d87ee96f4ce5c41bd0878a2f1860d8ef395622d700314280deb495a20f6. 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/SE6I32489034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d60c4c63e8a2ba5b469b9ce79f2c331f64b4156423c7d18523c31acf7799f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5752430516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3162394d3fd1c032d2de2b2cd4d6d160d2d9d6ba2e73a3b2e9ea1db177f826a8. 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/SE5BU2581872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e76e526eb40d4282322c55d476630c7a4d844a6c6edc7b76e11de69025cc62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6XY2559960.