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 0x67f52f00f5becf264aef5c744292435b89a542e3d4171b13b5b3398d7095efdc. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec100f34-fcd4-4894-ae0a-4d61d38b06c2.json and https://artists.proofprofile.net/proofs/artist/ec100f34-fcd4-4894-ae0a-4d61d38b06c2.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 0x12ec847d3928f6a5804d509b634a67b5d459c5d8240022f84132189ea9f45987. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/KRRAR2229704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e06edcd1e907599e0e7828d4c0723efd24a8256c069ad5eaf0c9fb97d1f8da. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRRAR2229786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f04f688c97ba53db5785840ec471a4cf498e9977d406c0db7df2bc82bdb12. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRRAR2303549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e70c2560f2e60efe2bc723c9e730bec3ffef0d0f5682546989368d23e04ff. 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/KRRAR2303737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc278efdff0f1914bf7a3f96e8befb2d42c3521140c968761f3e1f882dfaf1bb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:30Z), 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/KRRAR2309789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6105392c061868a9d3c516eaf507d798188b0e50bb8d5ce4d61e20b77f856472. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KRRAR2310098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec74fb20b82435fa6f15249d40648e17d3d17df3737bfa861dc1e042243b603. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/KRRAR2310210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1f426fa53bd5d2e500d5cca5d579e271c39cf83374b7fdb37319d8bcde5b4c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:28Z), 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/KRRAR2312227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6210a2566fa6786cced195410181fc832fb8168a009e7f473a41098bff2c7ae4. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/KRRAR2312361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f8caae34a1883a6eba743e6364feb8a478085358b921ddbbf5772d05b7311. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRRAR2313920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf4e82051ef44b224008dcbbd13c217ebfd6ba4e6e665d89f0bd9e4f20c337b. 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/KRRAR2314173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b01d9790f9b6daef6e664ec72b355c8d2b6abf435e52d14d7ed4bf4166e20b3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/KRRAR2314775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da6dde9738350d5dd2dd70a14d29a096f14444e1a19b3a4f5a7913290e5d41. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/KRRAR2314964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fac454562d90d134f7b7e1ce5f7f4aa8fbece4a85f01f7c3d31ac4fe9de3a2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:47Z), 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/KRRAR2328651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58450ec5255353f6be6b32c67888e9fdc5e18e7fb9e853c3b7fa9a1f5efa99e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KRRAR2330483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7f6440c6839281fa424689b16e3d740d6f9465258e6f390a199f0317849551. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/KRRAR2330491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac2586e4574ac9aedd0b732235f0f3e567db13927b9de86acf61e769fe5ddf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:59Z), 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/KRRAR2330494.