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 0x2131124f4529e42658640bbeab6b2ed8b788704339f4b63f225abc9ba7b97a43. 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/98836127-2053-460e-a863-01b12b7c997f.json and https://artists.proofprofile.net/proofs/artist/98836127-2053-460e-a863-01b12b7c997f.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 0x8646a1449f81c60bf99c688ab80eda4b2977f56c92f13aab73b5c205e7e49683. 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/QM4TX2324978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69e1fd97d1d801d0c0af7d7f92560d41c87f1261639f1ca8e9b66837d9581d. 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/QM4TX2324976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d5d116d86be52679f2ba199f60855c4b55dafb574b2b696ec53e3c03dcf7e8. 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/QM4TX2324982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1400b067fa21680cbb6b6454bd8e51a45ea16982f5ef1557134c510e2b6fd. 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/QZHZ42227631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1400b067fa21680cbb6b6454bd8e51a45ea16982f5ef1557134c510e2b6fd. 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/QZHZ42227631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f3e36c4573199ad366863307d76457fa3537288e3e33d326c5e454ae76ec5. 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/GX53U2010178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1707f36248ce69fac842862b4e7bfab69e9cb4c72e3f80caa524aea7315b70. 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/QZHN82110924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8291057ab20f82ceee9c0b68164bac4ef8d84eff98e11abff2417f8c6720c012. 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/QM7282412588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1951fe3fe8d5c27ff61eeceaa28be2ffd1620b8db6fd428bf0c365057d6fa320. 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/QMDA62333125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6a659a643886b1f27830e6a8dd5dac5daa1caa39902f882d8a89e70420095c. 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/BK4DA2310302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2174e1a1f5d7af916525eac0ac3d01e103dac00e1d95b3f9134876554647bf7c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6N22224580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d15bde922f04cf14164031277e30f7cf781c20ca42bf2f7f07799646501152. 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/QZFYY2132363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ccfacb5023f741889b5faf7d0fb61f51ec64c87e1c4eefdac569bd6ed96e30. 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/CA5KR2155409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216416a2330a71ed006934d29acde75da0b10abf56dc271632cebd5d1403c8f3. 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/QMBZ92406375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc01abdcf17bf0eecadca274002f057c633616a5654819525f02643c4a6a466. 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/QMDA72481377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad2fbc7222e62ea3ccec87c9a09408025333c346a1727d641816c4ceab7ee35. 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/QMDA72481378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86172db29502e1ca57c9d8b2fbc1e8bb5f46ec13ba69651b51af3ef30f7388bb. 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/QMDA72481379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2b92cb8842e304ee355126116f4a04e7c7ca57d88520cfae9be4b29ec364d0. 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/QMDA72481380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48befb16545f68d3a61f334c0416c9b7858049db4e9cbca42c4627d4ce1bd923. 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/QMDA72481381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316a700d3be1002e34ddfa8e44d3f065992719aee10d4663a18952882a1469a. 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/QMDA72481382.