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 0x83bd9a83b97a9312716b0e711f7208c355eed9a7839970d4fbd667f994083103. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfcde803-6ad5-4c1d-bc13-0a383885f28f.json and https://artists.proofprofile.net/proofs/artist/bfcde803-6ad5-4c1d-bc13-0a383885f28f.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 0x651b860a8753ba7a5a94405707d2344291219b71f1d9aed2306aeaec9e068601. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTB62267390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1f14de605e84a46dbb8bef4d0448d363ff829b72d04c3db3bab40555784a21. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTB62267391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cefef37bc32e6605dbede30b18400228979d5a7bc39443478ed87c0109f8e0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTB62267392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65358c1560c9ada458ba095f8cf25cc5989eadfcc4fecb588557995d85c97068. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTB62267393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50eaaf57c65df13d0c8e9412ed75fe7c1edcf965f5a61b169544aac94357577. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB62267395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5aeee9da87e3ba4abb590c96e8ab2bcd320583249ffde8b59d338e5d0316b0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB62267396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf629b95b3d8491b959199b9058f7f2e4c31582e7a7d5d7874e9c9ebea3229d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62267397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489d8d64735c67bd288136c464be19fb640c76cd136907ce378369fd5865b11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62267398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4213eba0bcf788fa5401122a88404ed90549cf99b582ef4190b39fe54511ab. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTB62267399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a46d214400878309c44fabd5d30a18514ad327f2ce21abee81cbf19ca79ef9. 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/QZES62345612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d3f6081c607717c39c064303c7b49a581fdfd147267e57760676bf9fa9824d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62345613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57deec0658c7adbfe836287efe0361fc089363d91e33c961dc646dcc550aff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES62345614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5c6d073d22d07b23b62298a7db977ce017210cd99374ab57d70d31a86c578e. 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/QZES62345615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f9950636ddffbf96e057af1ff4081faf23656274a0e779d5eacab4c41f9fc. 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/QZES62345616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b87a5733abc1613cf8445d486179020e57a035cc9d9514e101ef6a72acee33. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZES62345617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b1cc9c65b93a2728e18a7f22adbd3b706ef6d70b460d2b0c0ff1336e710cd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZES62345618.
Frozen Throne of the Final Winter of Endless Sorrow (The Funeral of All Life)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3e148d0cd7086e1b177fdaa5811928e3553c356c92fda6fba0e70c55f5c51. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZNWX2374133.