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 0x84c17cb26c9b63e722eee6ead5e53cddae94404b23ef0a78bfe67b5e3932cd0f. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d61e7101-3fa0-4616-af96-296f91a9a678.json and https://artists.proofprofile.net/proofs/artist/d61e7101-3fa0-4616-af96-296f91a9a678.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 0xbe72d3fe4857033c570cbb84eef2d764d7bb8b5c21c0a6ac3806fd12a64a06b8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7T2471754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72d3fe4857033c570cbb84eef2d764d7bb8b5c21c0a6ac3806fd12a64a06b8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:29:59Z), 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/QZZ7T2471754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f20e86a6b8791a4da4eb04fbb2ad2482db044ac1953beb1feebb0b8b6b431b2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA62527410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f386cf2196f9e36e5bf3c0b16764aef1aeaf637337e33c1b57b4bd156dfd9f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZDA62527411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d163d9664a771fa5963d36e927581177a1b48be60be619db6cfbd88808afa4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA62527412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1974ac2964ee199345673c8f8566a2849361fca61b3fe122d210342134762fa. 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/QZTB42518844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1e829d6be1beafeef5903c5346f091c17f4f0eaa1223aef5544aefcba482f3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB42518845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205937eb3d6613bd5955c662bf2ffd907bb009efcdd7797088364d881d266252. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB42518846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5ca9e5e9400dbdaeb9c6217fe3c2df18072c725bad4503bf00652e798c1901. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTB42518847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36170cde862bd7c5d16076d96de5275a7bf8f6d2a13c0ac01fa0815ef5e0e407. 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/QZTB42518848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1688852cf4ef1a963beb2306934e90416d37c8c685c91c5f499dd0f2023a2e. 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/QZWFT2534244.