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 0x7c7dd9b9e3c590e77b6875de55edd398ef65aa0bb0681dceb6bb7fab4413b19e. 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/5c80dc74-dd7c-4490-a99b-69f42688e924.json and https://artists.proofprofile.net/proofs/artist/5c80dc74-dd7c-4490-a99b-69f42688e924.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 0xc32dd64e86df195a1a5ad2f7b98600603ae9b6e86ea2b5efab4f745ec72abb9f. 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/DEXW62200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66174a9769442d7d8bdc0a5de3f73251dd20564559430439ca0b76ebf1040a. 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/QM4TW2277615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda291a4c880994c805be258b255c0a4665e4fb425aa6a69342592723fd975c29. 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/NLT2H2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025a35b9ee8190ac6f800c488ec5efb550539f627a4d796386141bb2f031546. 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/QM6N22294925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889ec067f32b600ff34848e64dd07d573a7ec01e5fe848e1107d0d04ff4e481. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864be3c4bf2214b6cbcc5ccfe6c4b2b63b69e74d075f1997c84337a98ada5782. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f9c435c1544d6eced965b714762f16795dcc2431fa92b5cf2b4958a23b752. 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/NLT2H2100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4526cf0c1b6722d7806f8e2ba7dd35a510809621cc261fbc9aeb5a52712ab378. 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/QM6MZ2291370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a3806cb9e4d635b955ca409d553c0a4b29a466ccb346a341a89d4770fbcecf. 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/DEXW62100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7376595d9d6d4398dd50c993e46eb7f30c30cd787630b3f150e979f62c2bab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LD2301264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e70cb2f6cab8cbe235a15a263ab44b23cd856829c866ae4c6f81c069d3ee14. 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/BE8LH2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6532a983dbe85b58f8cc8f4e65b63406bf6855c11bdd1c8eb21627ad03be0f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e81209fd91df16c49c4aef81333a5e8594608775d5e676a1bbf71c05909a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b37250fda41f1b91414efc1a35124160bb4fb4d1c4db87317898a499bc349c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db970b0a544001ef7826d810bc0f88706cf455b2ea78166199c8c16a6ab5ecc. 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/QMFMF2012680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a4dc7676d65f5321c1d5b29a2e62f568a61c01c8fb492b961c2f44317bae85. 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/QMBZ92066059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef5beeda5a59426bde5da7872e6f4a16ff5a22c7ea7fa2445d840bef236911d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2200577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5782de987d98373d71eb501f6767150b8973e1df89ea28b297ed98ad25a377. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLYK92200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17b22ee36db01793d27bc67665755ac7e7d6343bc87a37688aac3b9da6214c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE802100120.