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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6531a4c5b72350b57c67b0bef0ade24322041bb4b5c9a9ce68706606e6b3f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de5a1c2c-1cc7-4b51-b048-6f28877b4699.json and https://artists.proofprofile.net/proofs/artist/de5a1c2c-1cc7-4b51-b048-6f28877b4699.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce112e5a50523c27dc9548dbdf69b483e4f4ff8d7dc5256eefb87d919ece5a5. 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/ATI212413101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8d37451175757c3176392430e18d0f2ec53f8e4c3a3b3247597b60efe3fe79. 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/ATI212412801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9373f7de1facab3ae56d9ed7ca304d1e918602e88f73d18eb0f968715638a. 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/ATI212413301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a401b8f7199931f28c4e9153db3bed056efe7d778b5f85ca27b960e40a1bf0e. 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/ATI212413302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4907470d39fb5dc30b5686de5d0185f6280374200df3d3f67f14d00bd84ab027. 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/ATI212413303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4d2dc08e8ec06ef862a84dfaa84aeb2e758e628f55fdc8d45453208d0b78d. 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/ATI212412901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce112e5a50523c27dc9548dbdf69b483e4f4ff8d7dc5256eefb87d919ece5a5. 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/ATI212413101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef0099b0bcea06f2e9a3dfdd2dce1ceec7207108329c50ee84ee5a0bc6c5cbf. 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/ATI212413304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f6028f6644f0cd5f129130aa9ba6f93e58adb80ca8345263fa1b672b997764. 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/ATI212312301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a082ede837eeb1ed469f163a4f817fcedaea9fb4e8047f5757e2a5d06fde9f3. 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/ATI212413305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebad57f1e00fc1a54d6f53215f820f3f4d9dc5aaae84cf3d9d14ac2e436e914. 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/ATI212312304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8393521b832e65d2b6374be29a3a418e3c8f1db6eac7b7ebec819bc8fc08a90e. 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/ATI212413306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739cb766834184ff12f04872b41f7eeac72d790e85be99d1b162c7dcc3ac5048. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATI212312201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebad57f1e00fc1a54d6f53215f820f3f4d9dc5aaae84cf3d9d14ac2e436e914. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATI212312304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f6028f6644f0cd5f129130aa9ba6f93e58adb80ca8345263fa1b672b997764. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ATI212312301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb411698603633a46f014c74fef6d39335ae915329688c666460e8b702596dba5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ATI212312302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2779ad9a749cc34969ef5e5a1f3d3e7dd1dc9a403b90f1fac301386e006c667d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ATI212312303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dfd8f200828d00b971ef2cbac13a68180339e733acffb69c48f156cc11f500. 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/ATI212312305.