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 0xd44cef20465bd3db62442106f4d8e974aa866a4a6f1c047754b74fdca2ec325c. 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/2e2de988-fd68-4755-a5a5-34c759880a9d.json and https://artists.proofprofile.net/proofs/artist/2e2de988-fd68-4755-a5a5-34c759880a9d.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 0x1509d1202173a93bbe85f961842efd84bcd6fa68e0249bb87b56ec0ef5a806b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USRO28521204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83473b1d465e72fd90971fbd8e726bde1b4a1b74ddd7cc4fb55731b18746542b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USRO28724203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8968e0a207447112c72969bb9d9efd0c752e934e111e063fc5769b08b6efb492. 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/USRO28723209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9497becfea54e7cdb605074279f6aaa8b314054be8ec2e5737135179f8fc71. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USSH59141493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f50e60ba3073615bb74f094723e1da40377c15220abedcd169b756dc7370612. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/USSH59343613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bc99d4ecd775bbf7598ac1fd9670e7a68758d50b845e2943bef9014e1c679a. 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/USSH59542359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe75e590a01fb987144fd5782249e95f6dfa36da9e88f1299b33037c4c01161. 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/USSH50403364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c00820f7c68838162f1dd6eeb7f4e220ac21eb3006cfe9957ef5f2cfc3023. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USSH59041323.
Americana Master Series: Best Of The Sugar Hill Years
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8288e6b84e8a036317f17e2495dbe6b1b6c446f63a0da58d191291dd7b530a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USSH59041320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46706393a31c422b6ffb01fa75deec0ba560ae2b52a76df4bf878dd2f4696cbe. 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/USSH59542354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cfe56310fd58061ab90b5b4479b09f9400cdddbf5310f16ba58da35c089fda. 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/USCN10200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b624a52fc11adddcb847eed6d9f31c859c87821a51ae3231dc08f89ee7394. 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/USRO28724208.
Strummin' with the Devil: The Southern Side of Van Halen: A Tribute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6e57a3d14fac7bcf86bf95e60933c349fd032dbea250cfc3875eebe51992da. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USEWC0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9678c9a661e3ef35ba7443bf0e7af7e2767ecf7bdbcf5b69ddbe1eed619466c1. 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/USSH58841165.