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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21376496f9930b2f01c4a881397898c344b8d49c26cafd5fb8f8c74fabb32e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/274e4774-5456-4b3b-a23d-6a728a9b0072.json and https://artists.proofprofile.net/proofs/artist/274e4774-5456-4b3b-a23d-6a728a9b0072.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a1d72f6c87ddb4341eba094c191ef19fe4b9a910e2ad63cb5446a715b2d46c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:42Z), 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/TCACL1691088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8bc680a309f7d0a5e4e20792f84662cb70b8b43f4ca6a8ae61d4cf81114a81. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCACQ1616457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d4c83e0876a016b7c84c639b496384980ca9ba2635af8efdf659b5a909518d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:12Z), 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/TCADZ1860545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387db2ac37701f268ae8a17342579835bb98ef2aef89d960c422e9e05f565d7. 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/TCAEG1935100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a8a8c0a860df866c7b94aeafc1e24b99a806ef43f1c147071353d94f688a91. 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/TCAER2009581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d9639634d0c9b4cdf4ba09294ed50f86cb023c2be365d6039f4bdc69461c63. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA72235207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1003a44b1d59c79f433d6b01eeda6ae5b189e9139133e6795ac74511d39c0b6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGU2339565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80f3f230e2afb5e862db4efd87e88867525800f58473a6cd767a79d5018636a. 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/MXD782300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9db729ad278a194f292232ba9c8078265f1b1c5f0b37c05eb6098e628cf845. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHE2319063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6093ef0d389e0c93b8a8db86e2b55dc62faa23f306ce9201f4ac59bafcaac0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:51Z), 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/TCAHE2319075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15801bf5b21c966351afe90ab256b5662f0f9357014d142f8a634c116fa6473c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHE2319082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb956a62ec5341ea941c45441ae11328bdfe5a2fd31c48cfdee276b0c5723a43f. 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/TCAHE2319120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff11c58b41e26fc2d00811e1af7b2ed0e811e19885d338c6ce152d0b91b63132. 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/TCAHE2319135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedb2af48ca8e5ce15a768093a4d486b7aff4230094a3d86edb7ca0e06bb4a09. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAHE2319138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d8a093e2a86850c7832b85ee29086e3a3b0311c2bca3c131b6189ca55f5f77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHE2319144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd424f4426846819c4c6f546e172cf0cd06913f215955672a5adcee287108c. 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/TCAHK2372442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae68565279e5d291d34a91cce6504ef8d9c4624a24a8508d0971c4dc8105c1e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF152401526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419182f3ce51fca3b5e57f553a09b2a1064421180bc16586e0b38f9894d42eec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2454649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1172335ec545bc3524f673ac67d7bbc2d60013ff20545af2ca022792ff47fd49. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BK4DA2512544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53244c8ec7cce8fb47b3eea49757f19a3584e754362d06dfb1fe810d81a075e0. 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/BK4DA2523123.