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 0xb1a3ec20023b8995a6c704930ff8b1b8b4530f987618fe844d4d19b0b0688c9d. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/290f8c4c-8743-4de2-9d6b-2090ceb51372.json and https://artists.proofprofile.net/proofs/artist/290f8c4c-8743-4de2-9d6b-2090ceb51372.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 0x8923e7e464b8bc2ade0e9ddc58c934f7f2e220ad8762e3cca7ab8be2caf1e59d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21849991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7a22af9c00abe2e4a8aee483337236d29f463e25631d1d4278915399cc5cc. 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/DEPW42202635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54117764941dd78f8178b137078651aeb38b1118fce8ce60f3afafa495e6a17a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEPW42102632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf97e917203ff3d8884a4f23d131385264e76e6aac79de154453db3983ee2d4c. 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/DEPW42202636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cceb7793ffba7a3ef1289e09a35294bd61ac676103bd58a2e00e4306773bfa. 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/DEPW42202637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3469a44b0132a2b4a2594aafed4ee57da212861add2bc0e3a5593ddf620653cc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEPW42202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc7a581cb602b6940b6c73cf3c1b411ab4601db8b92c01844bbc7dbba361d4. 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/DEPW42202639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf107955fa68b3a3bf176da07a139c81aa884e90056e80833709608933b75160. 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/DEPW42202640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d2a8121ca888df36bcb328ec312811d34b735b921fbd2c2557cd88096da9f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEPW42202641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273c21d0a4e4ff7ea1c863362fd3c21e8d65a30a5e81a23dcb809bc1fe9af87. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEPW42202642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f103c0a99a116648a8543c2d2b1b5edcbf2afb76c8171f037c57573f6b0856. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEPW42202633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f04011e8c2a56d2a2e2a1498f063dc78787c05adac55b10e167c954bfe78cc. 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/DEPW42202643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c68a80f68bfb06f59b0981a5f2c3c1887178c4e8367cde8f69c7e21950356. 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/DEPW42102630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8188be102b31146f3992cc7a48b872f4a9a8f50bb5b3dda70250ecacf2b6314b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEPW42102620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4747a9815d0e3e11d9f1f7f2b1d0f4f5f1516992bac90c9572f1604f0599c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPW42102619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa0501ec63a34cb116a2257152734b765d1aa62597f526cd3a70f02c57dbde5. 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/DEPW42102622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c45915e65e2659c1919a024ccef27384bc319b45824798879bc842cb2b3f0b. 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/DEPW42102626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828fcabfc00ae4389003cedca4de3b640aaa99ef137fba4a06839a4bab376f4. 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/DEPW42403703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b96a7d68946893cbe9c45e6d010720b0fac5426534bc9a7452b23f8ab94f80. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEPW42303508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7506c29acf6d611e72078d8d0750aca3d6762fc1a930193113c158b4105ea1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DE1JN2359301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52494d289b0df7f3a203a636706e006a8e9c787f99b62eb0bdaf0cabb28e07e5. 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/DEPW42001673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bf183647c6057f618d93af2e0947bce78e80a5cca73ed8cd00c9cf0a993319. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEPW42001674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48df938bc0c1f0879f828770c0e46522bd9e48540023a1b9e9ad28064c28158c. 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/DEPW42001676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c95cdab220860031f3680d0a971b9e5512dc78b3f974019888ebf3248e8be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPW42001680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e25614336fd104d55ca071949a0144964a2419319fc8d98ac4c50334039d52. 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/DEPW42302512.