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 0x80feedbfec2d72ce0407ac6484948e090e339c6c0b820e3703cbad8a876b5ffe. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d00f6e4-e176-4f40-9dc7-aa7c836649b8.json and https://artists.proofprofile.net/proofs/artist/5d00f6e4-e176-4f40-9dc7-aa7c836649b8.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 0xc7769855dbbbd509edde0383f8fec7336b0dfac98f6e49ce1435633238997d92. 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/AUMEV2363399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35052b37ed225138c48300fbbe90482dbf10ac654d1e9d6dec0b03649bc9dd1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUMEV2355333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd547bb9b6e87962258ee6f26097b2b9a65c45da68e2df741335b4ba8bed25d. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/AUMEV2355334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccabb42e3558cfc36dc6ff8fae9da6a77e0275e1c19ca3608e564457e51e8e7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/AUMEV2355336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e33362265ea12fe29279f9853ad706116b4d75ca4314171161797f7ca4764f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUMEV2355352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c21dd65cc03cd9b7023abeb45d5bdf1b8a8b0efcfcb985dbd6709d0d5962f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUMEV2355357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec105535950181971596377a7fc975c807eadf140c212a965247c7ec6722b4d. 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/AUMEV2355360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb212cc32e957b8e3348d3dce97ddf287efd06fe64a8f4b357691e321c41444b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/AUMEV2355365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad12b7577cd88698cae5dc14168b6a0911beeff53ae86d2aa6d1b825257f054f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUMEV2355367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5beab0bc1e2d85e510189501229df5286948e0dcd53c4326c9746d8f44567. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUMEV2355368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f1ac7cb1d4176eb23bd6864ae5bc18b27cfe1079eb7b1cd99be2851242a312. 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/QMFMF2398875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7949cc6cd06747a71627453feca89a4a5bf0bb1df6aa2bb17b395ce1433906e. 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/QMFMF2398894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95e440ff89a9a6eb6328f875d04fc9d05f2a22893ea51186112abb9460ba8e6. 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/QMFMF2398895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c8309495ed8d9c397ff5eae89836974a18e487508587626a4082c846b17188. 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/QMFMF2398897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48c4abc7d2bb8cd45ad563f13afdaacdc3377f5a4feff832bb949e289d16f4. 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/QZNJX2368416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7a7321718ce4fceabd2a58d9d9740c6784ea0493b6effa3c4663a43a7fc6d9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMFMF2416068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb44587e9bff9175b90d49684a13a67c1063e0f1b192e3d7f5541b99cf921c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMDA62564586.