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 0xa5421b960ec5c2e6989d1526e2b2dccbc0ef300ecc8acd1f73bcb87ac549e4ee. 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/9c53f2ee-5dbe-4252-8ca8-49305e1ec909.json and https://artists.proofprofile.net/proofs/artist/9c53f2ee-5dbe-4252-8ca8-49305e1ec909.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 0x662c4285225fe9c95fc693025f91baf3dfbcb8e74cda6986264779c905371a03. 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/RUA3R1839212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64bec21c69dc8a0fc8de198d212cd16cb7ed94ada119c05d1f1b6d696d4632. 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/RUA3R1839213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8545435a33665bf274043867a319ddceb6e7eb87df8ff3d8e2073bd9d82c74e. 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/RUA3R1839215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fa82cc3506e99bbe853739be2f86db40844c0ac6fe427950ae10c615a2477. 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/RUA3R1839216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62160fbbae89d86a328e8cd58ae570767d954d7665359e24a3209762386cca. 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/RUA3R1839217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c27e3e304731feef4fccffacebe18ea6e9ee404027fb71f6d7eb182d63d4ea. 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/RUA3R1839218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a82bb1dd76319c0c18642183920bfdeff31c54746bdbb1bf1745a712c1fea6. 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/RUA3R1839229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea6b60600f14a6f8e5fbe5c1497cdf68a45ca0827c00e1a6693c6742adcfc5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA3R1912772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dc686f44550537c5ffdb0f453e84f9c81eab394dd469c9ee07603d7239a004. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA3R1918849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74e420a7b76fd3cce5b390879e378071c7ef97862811200ce04b58240a841d8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUA3R1918850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4126c3c32132d64d77954ff8e0c34375a71b97ea42d3a70832c3756952f21. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA3R1918851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a09a8d2a9d76b87a25749d9817f128ea0d66edc37c67fe2ee32aac54c0211f2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA3R1918853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0d4b3d76174a4369c63ee5b15e802191ee7518c02b132b8c5192d917ae2d4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHZ41977768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb011593d97085108a413d9feca98165bb437b98508693afad6368bbd16638. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA3R1936702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a84767b1471d12eb9dfb3545f43b815e20ea5e379654c608a2cc1a853b642. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUA3R1938059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcea12aeefabab543f9fd2c14b7512bde320cd42fca212fc61eb624b7e97dd1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/RUA3R2071996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6effeb39a21ddb34694de7ad0a1995f3cc86f506f945349f462812dadd039d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/RUA3R2137344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27bdc93da662b72744c7b3b70b2ecf53a125fb5b57801855c07739f5bcd2fb6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUA3R2141381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482352f13aaf8965825b94defce0d93fd54b034d9e3d799bb78a53658af7d1fc. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/RUA3R2141383.