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 0x41c01ae9dab7e2b42586433557967d6924c2c3767f441690d8341aec5e5d1fe0. 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/1cca0c0d-4d9c-48a9-a05c-1586af2de3b6.json and https://artists.proofprofile.net/proofs/artist/1cca0c0d-4d9c-48a9-a05c-1586af2de3b6.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 0xd4bdddf602aa0715cffe0e9a0a0f24a603a8728a51aaddd614bc4aa2130d5501. 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/FR2X42176197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81e224a4cd7b6e7aa109118dd1ad927e18da6aa352477a1e3230ff381244923. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INS7A1637915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03be31cf760366220d790db2f61ccd50fce811127e072a74a79c6139aa0b6c6. 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/FR2X42176396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7539977c54fa498041d9d063ba5bb3dd566b591c3c9a058caf747a780786ef49. 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/AUC6R2103450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6115bdc2b9081a483e6f9186dd44e1031eafba309687acd469a2fb6fdf01d. 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/FRX202390389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d6118f71f9298b67433b2830aa4f81d238d7cbeb5b24f86cc580c3ebff5a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INN1M2300673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08d13a5c6f2bee27f35e7c27817ab9a52fe116aad71d5c3b43283a514f01151. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA082346036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f164a747a7bdd606bc7ea9efc84481e02f9b75d8e2155c96b5c9f90730c4fb. 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/DGA092357151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004bc169f36914dbb22397fe51d7470eb73c3468399945dcfd48a9ff44a4b5a. 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/INV582311734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746642b83dfe7c331e2fc207a93d4e6dc896d7a6022d635c12782ea33c0f6c0d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:43Z), 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/DGA0M2412519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e462188815fc3789161b392b2fb42ff52d33bf8ea1a367bab8c5bd066992914. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:56Z), 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/INV582313786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09570ad34e4ccce20b095b4d7f84cf060a816e25145617761e57bfc724443e51. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ432379883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09570ad34e4ccce20b095b4d7f84cf060a816e25145617761e57bfc724443e51. 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/QZZ432379883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08830838ac336fc2b8c28db7431789f557fa423a55e32bc1ca868b7795795d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR2X42587244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf256a299ab827d6cfd22bf4438351f6ab95d5141b48be18f9962966f0ae9e1. 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/FRX872511429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee367acf8d78eac50b313166fd27cdc3c105eeade2976fb8ec1b1eb24d8cdf1c. 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/INR6V2500969.