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 0x7367a61e721b2b68bdd16090fcd2288e8153eac03adb8f0e24275275f0ac8248. 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/cb1d2681-3d39-4d65-bddb-26dd53acb8ee.json and https://artists.proofprofile.net/proofs/artist/cb1d2681-3d39-4d65-bddb-26dd53acb8ee.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 0x6de50095b3fba011323ba598c394fd9a8c825790fd6178ff70f2b810bef5e905. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USDA12318180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639a1e47cb93bd394acf9a04ea01f8986ba151f7850f86c7a1ad1d6282a2e9fc. 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/USDA12318183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2ffc6dd0489b0d853fb196eb965647f75165bd838e45d751ff4f142253043. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USDA12322206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5423b9a0a7c9f353017c3c71f3ca36b49bdfb252d208d731ff557457f69a950. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:43Z), 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/USDA12325101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88864abf59a6a081a8eb153dc992510f4b90eabcba1d778bbe4f638a8c3f9323. 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/USDA12408736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996e638cb84849410b5d8cada15c3109a98d942b695484ec428a9612616bd904. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USDA12416192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8ad148f3d7d994ea67c6e2d456ebf660e8618c8e1dc47bb0a7a6aa0d44012. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USDA12416191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f2b71d4151b8134a02fbe70aed43ffd220e865208462f38a40b575b0db99b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDA12421263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff0b9e1ce62c266ac8597a057dfdf18ef885637c5528e24292494718696c332. 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/USDA12421264.