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 0x43e38cf86a73db218f3610bad9aba8e79ff30a497650a077a274743ba982bb63. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a217fa0-0cd7-48be-91b9-6fd250fea911.json and https://artists.proofprofile.net/proofs/artist/3a217fa0-0cd7-48be-91b9-6fd250fea911.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 0x92fd188afba07d8f4694d4f2ecf6551d88f1ee79bdc128a6eea978b22cca8b34. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QM3DF2244484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb5ed6ac3f84aeb70cd693f2140663964f5b99069b5fac20d7547ce59daa7cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM3DF2406985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395e5d1515d451c80e2fe24d42a20dcfc323afd95e992c62d4d1a5d6b137a22. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM3DF2406994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077adaf9f9d1dc3881ae391050554032ff63be54b4586eae722cf92a4285383. 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/QM3DF2408310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace66d1b19a30e6ead0dac8de7cfcbb8a9b89f1ba6ddfa6def6fa00e43d8bd9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:22Z), 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/US3DF2514020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a907624da89d300d69cefbfa2077566a4fe053fc6f46500bd5b8891e01c67. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US3DF2514028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3732f85b28c4a58beb529446bb7c4c928989620011aea792045fbd1c9ba0259. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US3DF2514040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04332fbfabbf5b3bf2a6ba80b9d464a7306c0eca059ba39df1cea0f67a6c9ef. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US3DF2553559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaeeea7bf206b4c57d3b165cb6ec68460f1dcd8ea225c92bb65782cc41f673b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USANG2522771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a52ebe6e70dd12b5524da40eab0c8f34bac5443cb7161059aaa1cd9b262108. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USANG2522772.