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 0x592567ae14d7e914e408ec279d277e794596cf2598fa0c7c5cf6d1fd7eda647a. 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/832b43dd-5cc9-4bea-a2e5-103907089e6a.json and https://artists.proofprofile.net/proofs/artist/832b43dd-5cc9-4bea-a2e5-103907089e6a.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 0x5ccb33cb44c559d4aae0d19f15c33ff5321734f4aa46311c5525f58af40d73b4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZJRC2066756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ab1899bbf2ac65dbb22132bc2e4b4ccda693d5b31df106aec80d4cbd6800f9. 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/QZJRC2066751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b6378a71e8403a6f8d25a766a1bc1c48a8bcc0d19621fcc60c649d7a66537a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZJRC2066753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1159248a5a376b6a63411e3ee1edcfa2e5f48e888a3a65b2ea7fd296025396. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZJRC2066754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f23b829417ca3fe346919621bbc14aa2c2b584a91db409e2782a7d8c4362cbf. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMEP2150915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f9b9d99e1c05bb2e7a98980c4f2f90fe6895f65015b4878e0f143441581ae. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZMEP2150916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd38a795e6b67980b86017bc014be6667f898c9397415a04cef4a3e6b3541171. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZMEP2150917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb666dfefa10872cafc181c44c07d88f0ddae4b0bc18776396e978d7607048c5f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZMEP2150918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273def90994f11225ab4966d3aaaa960fcf402314fba586b7915794394fe9c01. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMEP2150919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbb221b3a1c208a23cb6ea3c8105c9ea327d5706bb67e0c8570ab78555cf16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB22266668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe28f290628d4a7e01bea5636eb574b5401c01f84c51ec153191e6b3536bf5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB22266669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521ddfa95bc2d4aaf8ac0c7b2c72f28d93703bd6e93e2633aa78baaec5880100. 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/QZTB22266670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c964ef28219ba694b1201d1f0868b4e7e7b5cfdec38495e983aa5782b89d3e3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB22266672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2152996c9115d537edb3679b5b29dba371aafa121b555d0ef5c2010ba91fb4c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22266673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8239be139d6e44939a52f780b065303b1e87f10d4549bb3cab83cc9d1b25383. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTB22266674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f490bd43d14f225699948d11254d0a58a43a5105124dca870c7cef7f28a48e7. 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/QZTB22266676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870d0cdc1be7e950f41d005840abbd3d09e60cb572b38c0adae75eb60475516. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB22266677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a571b41cfec1abfd9a27ad783d2a9d7115cd314b943bc20cb9a6962822540. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB22266678.
麻​雀​暴​力​射​精​倶​楽​部​： Unpleasant Fate Mix I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272e3b929bfd7b4f51f3b9ec803706a28290d2c84cf43702729a16725966626. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFK2388814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91b3f142212f06ef01fd1d2e2958c29c10c1cf1f9750ba6132912ec5f33036e. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZTB92478830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e47dbc22d5bd4e1d48d25bfe7538f2868771b0acc98585286ea767e1eafde3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTB92478832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff20f80435de0bff56d2f402cd34d4ffb55133319fbdf962f64772ca770d3b52. 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/QZTB92478833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49656ed0d96439d468b067b4f8bc31ee47c0119e9d5bfce1610d98bb17d08579. 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/QZTB92478834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd61f13230b740a5c0e3cafa6a9da390c645ba44598d2bc51da81a0fd6e3bdcb. 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/QZTB92478835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039a792d3a92ff23601159cda5c41d594e02993d47b8d5c2a6380bb0796a080e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB92478836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a3ddddc03a45f51aeb369f7bf291066c4ec03bfe7ddd732e57e3b368fce5e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZTB92478837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ef4c14f179d21e2531d33f55160c283e6266ac47e9c14026d0fc6d2e3eef0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZTB92478838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1ca853cb58c0bb9b721ea79893a679e12094c28e0da702af30671e1c13bc9. 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/QZTB92478839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa314c84d3bd4628676292b71dacbf1874184dd4bced775c6f144f89895ebf2cd. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB92478840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb295822f62caa1b8a2282bf5dc8a1e61b28e4781daf0a07de46a72d03931f13. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZDA72598699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a8d45b9aa875496b894305df17ab1970b8ebaca195178e97c4c42202fd17f4. 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/QZDA72598704.