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 0x1deaeeb9d98f5c388962a2fc42b15cdb7b8fe7db655e19931cbeff4e8877e945. 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/17e4c808-163b-4048-98d5-127481d0e642.json and https://artists.proofprofile.net/proofs/artist/17e4c808-163b-4048-98d5-127481d0e642.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 0x3e3c7eadc247c10cfb3cd510ea277a510fc410528f83daaeabf809a4a0987eb6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX5MX2168830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3beed64772c8e23e761c02c4604d3ee06b0f735ef27455aec5f46f9431e18. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU9779645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e4bd960a0cb0c6e19aeac880eb063557e346486936cedb5ba536e48fbee7b. 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/TCABZ1493974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbe15b531b017e092b6d1f3ef41dc11b0452299575f9c3f315fcbcf1a6c02e3. 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/TCABZ1493979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4933207f4765d50891ef2c01c200d3a830d7e696237fa32a28b464688b42553. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCABZ1494019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cbcdbd4319a48cea5c2b93abd1530042ff3ec902219b47b3a76b6e72fc36f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCABZ1494047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84e3de62f41113665a1d7d188e86f62f175aedbfde16acf555a312ce47aa3d8. 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/TCABZ1494050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6ddbb94093db86b59e40e0e532180a6c4ca8ea7329ad7f2f631a690cc8aeed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCABZ1494117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf25cc4ca6b22cdecf039f42a6e179d5b32bc3ffd5a1d74d4fb2551787243b8b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAEX2004221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b9f6a1b5fa38d8db35759f7acfb335f50e262602224786bdd07d8e214360b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAEX2004223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b1ed17d6610e2d4064fbb270452106650aa62f886359c325b2d1e46551debe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEX2004213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f90dcc6db7ffcd5a525a482b86d38a4ac6914b01a01bb748ce97a4a5a217c5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAEX2004241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854c0add1a114aea832aa031ad170790cbd18883ac7e89a67e662df45939ea6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAEX2004234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a078aa59d39fe160c8a499ab5cada8b4c487fb0a9dc973f7432694120f60e6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAEX2004236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d627c31d66097977a07d6f1baa12110f1415654d16d49fdab4b53c9fd5490. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFQ2155205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c8717b27804f8bfbfbf50ae3b82a06d58b67503cb6ff91df928eba8b8ae25. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAGT2331741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003528f38b0b10f38e38865b84ae707883b6852900cec201fbf72f25e008ca27. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR10S2495420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437b0f98b2e7cf2e03aab017e2b54005bfdf7cc7e9b81fca89a0e8235a4e8c6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT6622555183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca8f70104300d1fa08e2c0ff7a5b7b4a1987e9bd42c87c99fe771d43cf4070b. 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/TCABR1392254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a980014946dbd804ceae3be713eb45ea9f46cde8273c70d84b0d92817c0e4. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/TCABR1392255.