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 0xd1b6856e61598211d267fc07805b6de6c3e53b43ee8ede123221294d8e2b7279. 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/87cc0b9d-c45b-48a9-a95d-38a16ebe6ac1.json and https://artists.proofprofile.net/proofs/artist/87cc0b9d-c45b-48a9-a95d-38a16ebe6ac1.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 0x25743114f26cdfcf71b74e1576f9d026a0ca67f585483892ce0d2bbebc2e6fff. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DKABA0701532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ae58f880001a0d19f067c4f4ea18514aaae3328e0f57e2863be297b6bab15. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DKABA0800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5443302400ebba889e7f4e98d246ae9353026d8aa0a6654cbce3801f32c48bb5. 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/DKABA0800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca998f79bc834ede4975a914abe963064cccaf2fd5beb1b3c3e725c1b7e5f8ca. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DKABA0800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8beada9350a9e7931b7e49752f2b63a631a3db7a86553be801dc50e0bd343. 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/DKABA0800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506b26e15ac6162468d80e4db6ce65efd5e5887c4ef3a2da92c20d80f768e74. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:30Z), 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/DKABA0600945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871b9d1b7a09d395d03d79ba29e8cea3c63e3d1a261466b56441858f9681e9da. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DKABA0800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346d4eb5ed849e79aebf6e8c06a6b2ecc4ce7c14373efa436ac6c94f097fd2b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DKABA0800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e85e46dddfa7f25e2808a8d7921e1bf8e8ac10e2ef368d5465486eb7c57a8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKABA0701528.
Prop Og Berta 7 (Prop Og Berta På Bloksbjerg)
Prop Og Berta 9 (De Forsvundne Julegaver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba256e7d1036d6a4af9c9f2091b17ab305ac6efe04f29758ed7e28d57020eab0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DKABA0800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc442f7e34145c8aa7fe2e8f8d8dbb8e5407a7a0bed4728e23016df1529b72b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DKABA0800365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531352eb1018f877f3cecb814bf0a9403a325805893cac19785a52b8063e235. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:17:12Z), 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/DKABA0800368.
Prop Og Berta 4 (Prop Og Berta Og Æggetyven)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368203a6d459831b247dee988b5c8ecc93f8c876144220eda65aed0b46ab0c31. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DKABA0800360.
Prop Og Berta 12 (Tryllenødden Og Heksens Kost)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e85e46dddfa7f25e2808a8d7921e1bf8e8ac10e2ef368d5465486eb7c57a8b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DKABA0701528.