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 0x440758bb51b0a2e239f9d106f89b9a54c015ec597768f87d45026f9a101badd9. 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/f2e96926-b906-4c89-a865-48daac6beafb.json and https://artists.proofprofile.net/proofs/artist/f2e96926-b906-4c89-a865-48daac6beafb.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 0x6978a230ef56da9df5a45ab1b8226b786ccec70f5880697daf71a8d4466b6339. 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/AR5UH2300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe92627d32a26b8aeacfb7e7612b8f527e677cc56a07daf0ade36900fd6611a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUGBT2353802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c103f455dbcfc6e452a9b7683bacf0d75f6a5afb38e5eec9b5b84314248a7. 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/ARQ8R2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fbed0c46f903235afd289353a93f265b024c2b73b5e23676eda1186bb8d66d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARQ8R2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d3794a9fb503b43425ac77d9bab267d6c5ebf30b00d86afd979990b4af994. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR5UH2301241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed1cd575feaf7ac622740b65947010cff6c93a08e71d3d04dc16e0b3127a1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARQ8R2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2088b3e10b94a2bc5179163576d0fd06e61375abdcc027180bd50cd77353b2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARQ8R2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791015f188b5f43b7f178da1cb2f2423fbf45a339d649a9b871d1a5204618a71. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARQ8R2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3bfa0e4c250e5e437fa4462ed4bd8a1dfd19bb17d6057271072ca232333c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARQ8R2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631055389e9ae49eb162b08830ad0af5bddb5e86a1d283b6f4056a93e1672ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARQ8R2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973576d59060b5e80730212046ed89d74d7cb9aee5ad5cdd9bec543f1bbea87d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESUM72200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f8aa2d5870ad1b574ccc757ef69450c8bc8aa8e70ff48e592a13de54447ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARQIH2291692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c7acf48e79671f6fe96930e23fbf9c53251ef82365cdcadc1d4196986eb8e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5702201758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3b9ee5757633357ec5eb2722405a0bf2df1efcde78e46fba9137f9cce5f8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5702201198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ceea9beb315cafbe170ab9fd5c10ec8e3e86f118f4f94c192762fac251f1b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESUM72300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ea02a94b53ba475413798aae87372f0f83564ef756f4a4b0c75a66576d248. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARQ8R2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe92627d32a26b8aeacfb7e7612b8f527e677cc56a07daf0ade36900fd6611a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2353802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62602ebd8b83f045a30e8bdf43b9b245620792daa646d03f4fe9de76c54a4da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARQ8R2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1278c39c1f21abf89fa2e5e8af74099d61956712a3c4c2fcba34d0a004fc4c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR5UH2302237.