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 0xd5556ec278434e6b7e8bd34e32b2e4bfa7f1a496f1699c9af0083830092a640d. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d572171a-bf3c-4f37-929b-3fd547ee4fe9.json and https://artists.proofprofile.net/proofs/artist/d572171a-bf3c-4f37-929b-3fd547ee4fe9.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 0xbdd51d8f026d3f16ea2d862ecbf6c2f9715042efd85ac9de7057514980f8c074. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZTBB2400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a22bff52ad786bf0737cb5c792912fb2cc5b0e7f868e54455a2e2858c7ad5. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZFYZ2577545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad209e3682d4717a829de532137ed063e61af4ab78f316f8f21638ddc449b9. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QZQAY2522296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad209e3682d4717a829de532137ed063e61af4ab78f316f8f21638ddc449b9. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZQAY2522296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550f8ad3f86ffe0a093a689a7f1da13657d885f6e219efffd10e97871e9d4d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTLA2532049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad209e3682d4717a829de532137ed063e61af4ab78f316f8f21638ddc449b9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZQAY2522296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a22bff52ad786bf0737cb5c792912fb2cc5b0e7f868e54455a2e2858c7ad5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZFYZ2577545.
Love Is Everything & It Will Not Save You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad209e3682d4717a829de532137ed063e61af4ab78f316f8f21638ddc449b9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZQAY2522296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889d5d87c213d39843a716f0c1b25ee7adbb8b5a32041d6dba2e159247fd4609. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZSYP2566642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0233e45016239b6a1e6b65e7ee0c73bf0f9a888854a91abb02f883e909c52fd. 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/QZRP42470844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd51d8f026d3f16ea2d862ecbf6c2f9715042efd85ac9de7057514980f8c074. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTBB2400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1a38e83283e219a3bd8ffd30ae74f11a4fa8922d881eff63e09f47a2cf621c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZQAY2501615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bea9f827c90cb38a3fccf493645f6d375d7fe024dfb15a1dec6b0bef2cf6a. 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/QZMEM2432825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124a89833080aa64f565d3c66b95ed9af6729e3cdff10a4ba4a1dfe6b4b1483. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZQAY2554296.