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 0x1ef74df2fdd743d0876296b51042a012d68bacdd623217badf347a403eab8b9b. 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/e89233a5-d469-4d2a-8fb0-6ae702d01bd9.json and https://artists.proofprofile.net/proofs/artist/e89233a5-d469-4d2a-8fb0-6ae702d01bd9.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 0xb162679c0a7d8fcab6f7fe8b2f3ab2e7f044a138a12968f6133f1574509aa538. 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/CA5KR2349741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a903d9f7f2ef861211384d7479903e0880e0affa7bbfd0487083ce3c7ac0e08. 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/QZK6H2339853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2bcad6f8037207a46d6e864a880e497d5bf91fb5e7b3ae1283fa7857725de6. 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/QZK6H2339854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace57c3b7d9a448129c5a34878dc94a007f1c277c262d46d0db7dbc502a2be62. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZTBB2256348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa560d1fddfd859c0f3da2ae75b50a6c8b5015ddbe63bddc9773563dd06da6c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZK6H2339855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984dfcff638c1a6f1f8b1cafac00e9fbb30e80b50cb5c8b2b6fb5b70549077a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6H2339856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb162679c0a7d8fcab6f7fe8b2f3ab2e7f044a138a12968f6133f1574509aa538. 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/CA5KR2349741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79d0cd2cbf3bbf94107f078d77f21a72a2b7cb82549dff7866d9124f814e4b. 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/CA5KR2345424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79d0cd2cbf3bbf94107f078d77f21a72a2b7cb82549dff7866d9124f814e4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2345424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf62d74c726b9205dce49b1cad39dbd5f6841f80d7b795426f6c3f2f2aa777d. 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/TCAFX2108895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7397c491c12fc4b387906f5f7e33e82f3fa6e8118044859593a1a0eb6d317b. 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/QZFZ22402398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d039b5f967b83f5b4b447ac7080c56b3f8b333a54b83ed1ca6b3291eaf14a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2172551.
Be Someone: HoUSton Population (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d039b5f967b83f5b4b447ac7080c56b3f8b333a54b83ed1ca6b3291eaf14a0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2172551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583a44a26d8f2f40a6d63a085d1859a73f9b3027f514b7a859672009a80d7023. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812404909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0f9848e0f5764d97e716110440ee58f1ade37c6bdf6ce45f93ce0b9375c6c. 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/CA5KR2392723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5993a03433d6a726d14caaccb0b1544acebe4b543972337f320e593b27e5dd7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USUYG1404708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a300eaeef795722dc49521bb8b4907acd1d4da0d221b6ac019f9337c9e2d1d4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUYG1404709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39376dbaf72b5ff43084788239d166f44032b8c522d09f90b5542eddd56edb1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USUYG1404710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c94f2188cdc89db159ced26c9f324542371fddf6f34431caad9c211f1d07f9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USUYG1404711.