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 0x7461f8f09e5c1f1280b9e445c9524781251eda65eb756fa0764587ef7d8cc441. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d36744-ec89-4ca1-92e0-ed5c26d3ae27.json and https://artists.proofprofile.net/proofs/artist/97d36744-ec89-4ca1-92e0-ed5c26d3ae27.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 0x69ef90e90d20f6bc7fa13461b126f8149f699d8a83ea169795df29d2bffcb4a3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:28Z), 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/QMEZE1946261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cc541ddd015308a42bf071ce21a746808049042817c60d7c2f92733c4a39ac. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QMEZE1946260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0145e15556c41f7970ffceea2fac3d083d530d4c9e9cceb9082a4d07b3cc83. 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/UKXN22496049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabb2768f4967ed0bb7806c29e85f62a95d111660f0c64781b7c6d4876f5ba13. 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/GBMA22477422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35114d068d9ef8a02db0e64a80e1a8d7bf6f0435f7745a177c5b235e735471a3. 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/GBMA22477423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1784f7609739b67253f1998bcfef64debac98d8d2ba32f9793d7043937d9a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:39Z), 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/GBMA22477424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67a774429a7629311d29b03d51d31f80e1889f02eef4626613453bd87a068d9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKXN22335567.