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 0xf766198b279aef278f9cb4167cdf9655c2c53a49e0757846426741c1f06bbc6c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/038bb007-921b-4a1f-85eb-d6849323b500.json and https://artists.proofprofile.net/proofs/artist/038bb007-921b-4a1f-85eb-d6849323b500.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 0x044cf9c8a5c6a88aaea76a05a29fc8438ba558009b9676c4c93bef551bb2002c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXBDT2458218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61df587436d528e296e4ed297155cf78f716a2ecd0c9c7ca2632b288e0cc30fa. 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/BRJT41100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb22683589472eda960016d6c683fd97abb24d6eed6ce059cffa600f876bb65e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:54Z), 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/BRJT40300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b98dd0999062877ba5b988b07adf3595848ca4322ef759d52a648be563a31f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRJT40300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece072209c31f154eac2fc7c107d6f9a8cc1150cb89a72737aba82556aea1552. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRJT40300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4a3fa825b29f1c52a1d70e7f724621b2b2ea291b6f25e5dd95f97a598b7fc. 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/BRJT40300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5ba90a9b53aed78d7d3f3639ec89d80d9f0537fc8121edcb0db82c4957a42d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRJT41100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b1b8908e6e73cce9140a3c6b6a38263eb7a6aa714eb2b577a1a56036ac3c2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/BRJT40300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb909c76f28b0aba6dc74e4780434ad44cab6178b3a83f4ac57562d5ce0b4bb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BRJT41100007.