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 0x8482c3977b558752a6d855c8321f68a40d4f43e2a18d795a606b8901d5115be7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d27f2c2f-9611-4fb8-9c0a-6a5a2fad22ba.json and https://artists.proofprofile.net/proofs/artist/d27f2c2f-9611-4fb8-9c0a-6a5a2fad22ba.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 0xef5690f58781c91e519a805c5c6f1e3c8727ed7b9b6ea02bbd0b5a3151a29d0b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:58Z), 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/USA2P1840850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47630320b0c09e11074ed655fcf0bbe183a19f8ec6d2308d8c6376a0f690d3e5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2P1840855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfaf5624f81060cec2f5c5c31f60b81e24edea281604eea5be99229514fb021. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:30Z), 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/USQY51607442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c312c2c215ae34496e409dcda92d4967733fb06db207026f5c24ba87f13e6. 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/USQY51607443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00346cb91009d1f88a972c9b2eb9356283e1f2b4a7407ffe0b9c3834bfae3d66. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USQY51607444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a14360645df0fd966b68a1fac2a48e4a632ef79e01eb6a0c3d4e3f6e4f5c20. 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/USQY51607445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac5efdcccaa18b781b0e34d0a540a8cfc6747b7bb19e13284a2efa6953b65d. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZK6L2455129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48a2925492bbbfdfa47f3501455ff73358fbcde1e8aa5b850b456418518132. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2455130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6658d55030560b6e3017dc032bfb8dc508925827ce1c82a7f15b2c9d37afc. 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/QZK6L2455131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7943419116439830c7fc23db4f800cf6a692c20e2b78a7e372436c2fd664d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2455132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b9924a2f8d05db58d5a28c4ee9257979033582be7458bbc8f6e0305bf2960. 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/QZK6L2455133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83cddb9e660e2e661480266015331e3e52e7fe8b3ca0471d3acbe3d3afe7a1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6L2455134.