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 0x1554bee290105c1e04ed7906e75287d3021cff0057c64771ac83874c89a36ef2. 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/3b3d1bb7-e17a-48e4-b6bf-2a554f74ecc7.json and https://artists.proofprofile.net/proofs/artist/3b3d1bb7-e17a-48e4-b6bf-2a554f74ecc7.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 0x6f8e324e6af0bda887b0285c64faee8bf8cdf99ebae898c32d659ef3fecc6840. 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/QZDA62084615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5147ed456e8b6d1866720083043e56fab2511ce3a9a275545c1896679ca2cd71. 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/QZDA62084616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2f62cd681a0b043297607728769fb8053e2594f5541aa24d07f9b1757209d2. 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/QZDA62084617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76e3693256251ffa737c5dd0e3142c7d4e69a278324d6bc12c442f90cd7dec3. 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/QZDA62084618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754cab363651425a4c371ee662517f9ee13d8c2118291332ccd549e08af6ea7d. 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/QZDA62084619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1208ed4ce91c41a99443518021461eaa32d4706f9c0c9b282c13a29b265d312c. 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/QZDA62084620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384ef715604791a5f6fb51536c45c1ad7b798d6002ac646c68dc23a11931184e. 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/QZDA62084621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38fd9f28cfe2452d0a372f5bd50da437ec72ca18a7b4c14ca5c9df56069708. 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/USAT22312482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda703d8f92f7d02e21f6461dd43bbb908d378fe4799333c227ad8fc150767574. 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/QZK6P1917495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a1ff34ea936b8a371f4fb7cc187a5af809ee35eb45d380be8bac1286b3fc32. 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/QZK6P1917496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee694424c78d423b4c9bc50aa538f443d2d30ed8c55922e318379fbb79eb38f. 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/QZK6P1917497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cfbea361c0703c293938b22872a605bc57b75eaf3fad2e4a99c58e54c91d28. 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/QZK6P1917498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e953cc9867526036b264c5c6a2f46cdd754691660f20c75a6b5297ee51177. 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/QZK6P1917499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e97044683db9cbbe51b96b5f91202aeac78b931cba3c5900751a3839367e5d2. 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/QZK6P1917500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de0a32b766d7f9c54e5d0769983aed47de548ad8f9ab6e16ede6958a69371cb. 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/QZK6P1917501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc281d907e49c27ace6913ded34c49fdccc6849c15ccf0d9a659bf48e0cd1705b. 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/USQX92402449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441ac246f00b2d1f5b23f3be7b612fd11b91dc61853b3a4e58ca56f48c5710e. 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/USQX92402451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e772ca0d3ecd8f62af5c93d8e7bd42eafd1cfa11d027ea838f8d0531e093ff. 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/USQX92402633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36ff30629c279b0afff7f0abf7fd0c1fb4b3c47c93665040d17463dfe4b64ad. 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/USQX92402634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a110102cbcd3bd0198af4bded74c3990c3f66d35178c49e0709d30136d85728. 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/USQX92402635.