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 0x8c837aa5dde61f207ffcf09d25ed28dc61db6d82108784eb702559b34b11981b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/879e602c-928f-4fc0-bdb6-76cccad1bf0b.json and https://artists.proofprofile.net/proofs/artist/879e602c-928f-4fc0-bdb6-76cccad1bf0b.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 0x8ec16851bad4e9c80554b4dc9312df9501705b46c41b6b981846cff847a27f13. 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/QZNJZ2436228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e3246011764e8d4bf2f71f32d74f5496bb978bfc60317fdf53dfb443bce672. 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/QZNJZ2436229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46589aa9d357108aeb03d2cb7abf057764b9b074c3ea44c1c6cd25d7f21b2cf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTVM2444948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd3c3ff7b35c6b165c14131990153e4c5915c2968bb1943b30ae0a29a6bb48f. 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/QZW9L2473121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692b519d73fccf8e4edf87d011942232fa67417e3269fc362e423ace70680b1b. 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/QZW9L2488885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ada4de50a8e1121d410cbe164914f6e5b349e7f40754263a138ffce788e559b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZW9L2488884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b66a8de8bdae8c5ce43956260abe32c78496e190a40f2b9da407beb061cd9d. 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/QZW9L2488887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e80a1eb754dce99bf5c0f06c107c3d4915c6e231251b2a5b009e82322dac891. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9L2488886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d4ad61796d3e65b46eb583aef97723cd24b9bfffa01f4ede5a4ac39bec70bc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:23:10Z), 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/QZW9L2488888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f24432fc8bb701a916e503652968db32ca96455632ae3f03328eafb0c45592. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9L2488889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746e6d64271c1625edef9f4174ee97fb43d302039ad3af2b16ebcc90b4385b5a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US7VG2570187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8266588befb1752f6fe1248f7023e0aa0ba880d1f496dac116a4268c5ca553. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:33Z), 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/US7VG2574126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562057700d5a3f6b43d1518fb16c8d341104f69fa76d30926dc4426d9c12187f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGLM2598781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4581f9842b4e929c773779c841d0be8e184bf129f5add45d05a85627018e49. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLS2535697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bac962286367b43f025da01379b97797d49d0cf17e81997c544f346492ebbe. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZGLS2579348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7742e8390bb71b480f8433f72e23d9b3a5087e141d8738970c9e8ff27ab744. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:20Z), 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/QZNJY2568386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f6513c58acbaebbf178439409f3846d33cc285249939a8ad3680445eb462d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:13:51Z), 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/GX3Q92092592.