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 0xaa977fe6525b605bc8d8b5a4d0cf416f1530f87ab3ddbd14ba4c750fac055a85. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edf4beac-5e8b-4bc6-a0c2-cee724055ce7.json and https://artists.proofprofile.net/proofs/artist/edf4beac-5e8b-4bc6-a0c2-cee724055ce7.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 0x0230a3b0a49e69075760ca24e48744aa7f98aca37ac9d92839f76a371a9826b1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:59:33Z), 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/QZPLR2064822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6163c0d0136e37b4f1bec79b1526e1bca54acfeb7fbcebd03ec84c2c60a00027. 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/QZHNB2107168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff8b16d311433b915535436900aa14cd15884feedfd17fb9640a495ec9b3055. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:13Z), 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/QZES52273998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d80764410ca45e58085b9e1ff316bef6c0227a39034b87814efbdb1e5bf533. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92221479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6d90e7de113701d72d2351c514621ec203042c6854b62029666b4071a0faff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNA2431346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea7413aeb2ea25cf5e13bf04e85b7c38f6e8c82dfbb7a105d6e47552b110267. 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/QZHNA2431347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38356ff900894bd5cebcc818e776ed4ffde93b8f82f4d14621b14bd94e840a10. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZHNA2431348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecd41ef648850e3e319c27e9c7c9c8ca9ebbe699180712800fe34a3b0cac88. 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/QZHNA2431350.