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 0x2dfcbb50d03fb313589ee6426c73b8c7986ceaa66c557695a13b7d6c6cdccd90. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92a217aa-5d0e-4d2d-825a-c4d4b9e77b21.json and https://artists.proofprofile.net/proofs/artist/92a217aa-5d0e-4d2d-825a-c4d4b9e77b21.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 0x484e0c492d6d3945b92076b1dae09feb9e129bd560b5171584592a1593d764ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:54Z), 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/USRZR1566303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732370417b98700b6bd6c5df06888793af4aed692c4765124380bdc43d51f3fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USRZR1566304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071543e2db738305105650cb2e0b453cb7f4d21045f2e6d73f7cb670d579382. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USRZR1566307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1755d0cb29e8dc5a4d6b60be8e017eed2931b056544f560fd93b2fd8886ae59. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USRZR1566308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee2dae9915316b0c068264d49efd9d719c89c070a2507b0c9dd4f3b8dd506fd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USRZR1566309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a298014e329cac96f77f571ed7516e09330cb75a8bd577921d2262294220c. 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/USRZR1566311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccd0952d3f6a19e77a9e6c6b8840bf0f870a6ad073a68c00c75739a285a6cc9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMEZE1948874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8831c7a120757b5e76d77c14e46142e9a0b120d21475bd79032ef240aa1ba9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2346203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b399f43d75f140673e429218590372fe6a2c2d12e768c2ceb634df7e0b83ad8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZPLS2321702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161650ac095384b126089c160ab7e465e77f4aa592be1d48692817ce38fb090d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZPLS2321703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f4981028183aa0a9f4405ea957db166ca954cd4b14a672f8e595e8d9cd71c7. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTBB2385794.