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 0x294d2fc080015833748135b574a594f9bc02776a4b15f69d39a49eaef79a1829. 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/6d6888e3-7c13-47a8-98fa-32b395b5259a.json and https://artists.proofprofile.net/proofs/artist/6d6888e3-7c13-47a8-98fa-32b395b5259a.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 0x4ffd0711c00ed75ddea77f27da3337e83ebf46478b957d33d7ccec2fa8df6604. 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/FR10S2467727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d400f06f3e74b14250c719bbbf3cfdd415def52508bbe3cd04c153fd600fb4. 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/FR10S2467728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1ff5282f30a5e537ec5e00868220cf76da3abcb15364b290e286f6d59173b. 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/FR10S2467729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57958b68bc9b9fd7f4fabde7d68778c3c76b589748f0b8e963221c907feb0d. 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/FR10S2467730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273eac0365e7194c83969d4eb44823b9409125b81a11ae7afa8d08aedb2e39ad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBR122200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be0d71c6b111d25c7078d6ca0291204ad31a14b0b1ffc81e1a4e698df6f5404. 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/QZFYZ2479886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3373c0ba5011146ec1f7ecdfd5be5c78a4685bed1a06a787bbc52947c60d6a38. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR96X2283610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84611c58348a0bf3630996787fb0185367cd99c39be1ea3e95c11460c5be1012. 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/INB942401626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3862da8e4163ce3cdfffdc2ca45f675c7b96e0c933f2b9e592804fdf850f11d. 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/INC622216266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5a66fdd97c7065ef790155cec8d40299147ad1fcfa7c8a86d2c0f45b3a915. 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/INC622215561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba87cd74c1d8f5ac806b35321a405d50f5d4d50ff601b7039e1e79eba182e80. 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/FR59R2547035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b20943534a3ee29fb17493e3fead2d992e31d90eca6409a084b8d127dfd5655. 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/FR59R2547038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4259e50ddf7e3c933c6e21470f15919f97b77fec75f47821412ca480a7de886. 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/FR59R2547039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbfbfab78d76adcda0cf7bee9aaa8d38195ad571b5defd377d529a5386a08d8. 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/FR59R2547041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba025f4f66ddd794c45f98ea2f680c79ced4c2825450e37cfe6ae0b1ce951b49. 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/FR59R2547047.