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 0x13a2945ef2fdb3b5b4cba8e25b044b527471e0b24f8064829d64f76fdb2856c1. 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/b90c0491-eb02-4a74-9853-74bf89b81ecc.json and https://artists.proofprofile.net/proofs/artist/b90c0491-eb02-4a74-9853-74bf89b81ecc.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 0x8340dcf6267b250d40378e681f6b77bc98451da4105289180bd6c22e4ab97508. 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/DGA052334530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0077decf4395cda50a0d03f7d4ef073e8f388e2e44bd57af9489dc0975c44e96. 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/CA5KR2215279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa7cede2bc7cb5d17d96e7dd4fb5066faed8664e0e932da90ed89b246d55454. 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/CA5KR2192745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7da12dcbee0f0307132ea07d15c0dd8d6d230b6918ceef0b31c9ca97c45c495. 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/TCAFE2010692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaaffcab56818e2fc0c0f61411eda36c536c1bfc9fd19d2a7a7b3a5df6eda32. 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/CA5KR2310523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8dbf3d8fc10d327e5f7de099c65d9952f2a4a1e5c461b5906c4072352ae09. 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/CA5KR2310524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90b2b4c46472e9f466c3d842cdea1805254fd96dc518610befc9a61f5ce5048. 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/CA5KR2310526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd17ee049a93fe4ccce8e644db37d83c38f77a318f2d814e2a396b534a8735. 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/CA5KR2310525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec5f410b99957263e94781520ca25bf0dd0ce3543b429e7164ad6526d2fd01d. 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/CA5KR2130301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a30f1268742a137103e1f22c6362a79174c3583001c88bfe001946b52e4be. 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/CA5KR2310527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104de0807cc993d9b99ec6d813f3dadd1b82f9b470229a948887a8446f196746. 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/CA5KR2310528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd10b3eac6fe37011f1ffd4605e394a2f5e1a9894cc73db5acdbb09fc79b16. 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/CA5KR2302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefdaa73ceb4347be8086ddc2c7ed4c23695868c822589dd241837bf2fa803cf. 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/CA5KR2310529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba395e2a4fef08b0c9427d010a19740b25a9ecef3a57e4818f3b7ea035e2ac9e. 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/TCAEO1945471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d9b6c788354d98afc88422e73045a6824b4e76b2e745e3ab028859f797ff0. 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/CA5KR2310530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f13147d41bb614b6fce20dc0a3ba10d8893bf58a0e15fbf687fce48dcced2. 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/CA5KR2310531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a597066f6b66c03e873d720b53da6abe092ddf7612813d78d48fcab1af643. 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/CA5KR2310532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c28f75b6a96b3c04da17d4b4bc007a97cd025aa9a63c0b79c340e41113a21. 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/CA5KR2310533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa7cede2bc7cb5d17d96e7dd4fb5066faed8664e0e932da90ed89b246d55454. 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/CA5KR2192745.