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 0x460722e87ba4d80a0c3aca166ef97f93b7e8df01133a1df478b18751f45a6de8. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bb1c46e-e1f6-4736-b7f3-04ad7277220c.json and https://artists.proofprofile.net/proofs/artist/0bb1c46e-e1f6-4736-b7f3-04ad7277220c.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 0xb4883079dc2f9c4db382fe8fd539f148d97805887f096d16c10f7c93ad51625e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZGLS1973329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7401d507ee000023946d45388189a1a0a986afe31f5dad69258d7b8ffe8d2943. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZGLM1966553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca515db703cfc7af3b1f7a2f2826a2132c526f8ce0b1b72dd2e14a39a2998e94. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZGLM1966554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe899b07a16b4239fec69dae69ca02b0f24ff91b49566dd6b01dd2361466fe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHZ51900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088e9f65e0366de70968ee117d3fba726438a8eb5f36eff5c0743c8c548e344. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMZ92024490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b76990b432b4070b86639388978814a1dc586c1583481db17a80a0626f3282a. 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/QZMZ92078456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a0daeba8f6f883624dc0f8c0fff89bcddebfc12539f5d66b5241eaae48543c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:00Z), 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/QZNJY2177284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6412a6952169935fad3adbeee24ed5a94a1bac66d8d7d6d5d229f6695cc12bce. 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/QZTPX2226349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2403b6f2999f0f470a52e397176f130db15b1079ea983a6bba10b28c47eac3a9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZW9M2283210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ca9a648714c4e3a34de07e59650096f26697737bc89c57873480cfcfb7309. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBWUL2203646.