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 0x105311bb42802543b51a57b1cf766032eb3c79e812cd6c43a0431639182fed8e. 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/126e4cf5-40fc-4bb2-a897-44fefefc90c0.json and https://artists.proofprofile.net/proofs/artist/126e4cf5-40fc-4bb2-a897-44fefefc90c0.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 0x641b6e554cc002a6ad95d03fe6d058e07864902012ea730cb94cd855b45a17fe. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZK6G2007957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff776917eea2f9e08e584ba008a259d37e5e95ad88da15f74bc45fbdc06284. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:14Z), 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/QZK6G2007959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9606ea9e2f775d7dbe09a83d57b1734a3b6da30960387416c0f16fa860ad6a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFYZ2211324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc063a2e9b6f43aac7355bd9fb3eb08323b0263b9f160ced2bd32d62084cdd4f8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:23Z), 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/QZTAX2392815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edb84360b41c5c1415fa5369915155db3774fd16c8f67bc51f7fef5473b2ef1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFE2390256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e79b153b4074c79a0a8284ffba586674fd248249d19c4c293f61d1a5fae1db. 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/QZWFE2390257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a16b25fd7649a30ad571a72d8a2512e7d56ef4938dafb116806df815befe63. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFE2390258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c20ac7797637d54bc68672ae0089afc2835c612d81f0ef5ba6cb04e4a24fb17. 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/QZWFE2390259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa763f11631359748c612a6ce1171f57230ef001b23faa4dd8ac4c7cd0dfee11c. 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/QZWFE2390260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6184e74731238e19d4576d416f8c0133271cfe573161ba137fd393d8ac58afbc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFE2390261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6b6595929bcd9c8a2ea12e338103b4e5d950e600ee1d85d7d5037a604af1c. 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/QZTAX2392817.