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 0x0d1e3bcfa72e98cc9b77685c16d5a6df832ef53f148cd550fc490e6095643f93. 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/f29f246d-4bb9-4d6c-bb20-64f821b18e96.json and https://artists.proofprofile.net/proofs/artist/f29f246d-4bb9-4d6c-bb20-64f821b18e96.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 0xdf06229b60aaa2983c644de0f2f40bfaa67ecc6c3d50553e72bcad0cfd5d2b56. 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/QZFYY2427840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2c9fdd0816683c3c1134069b316d5840ff8c4e2834897e11c63f4d803c6c8c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZFYY2427841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f4c53c5122afbc4775bdcace593f46df18dc9473bf79e69bfdcd9fac142ec. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZFYY2423416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9b7128f4425a1fc7e1046ac23c303c7d0dede9a3695f89dab2d5a98307e47. 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/QZFYY2427842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5be34af0014da1d38e392d93d7bc254cb22ab920d26eb9cda393529f348893. 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/QZFYY2427843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f4c53c5122afbc4775bdcace593f46df18dc9473bf79e69bfdcd9fac142ec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFYY2423416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f3c31f33bb1d842d9daaabceec93a5996bbf350f0f313df6b47e9263e0e241. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNWX2330967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ea5909682d5a9573d8712124e63a4d928c14a50ea57ef8a0eba4f5e452aac. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWX2330968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aeae830e6384e21fc8a355c5cae932f87764f0a64286dd59dceeebd2c52f8d. 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/QZNWX2330969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabe8bf85aca073cdf7057aad201fd5d02f0ddac1d97237eba3c1155fc1eb5d6. 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/QZDA62303917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebae269eb262e564ada2ce5e678f166587d9f603494cce37b91203b11ed34c8. 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/QZDA62303918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf737311202b5508a12847eb792f473c9c654480cfada7ca9924113176990d. 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/QZDA62303919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bc8652e0846bed6c2a1316ec5692fa72f967ba678eb5a9c2761203d50069b6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA62303920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c250f4e4b4ae316312179b6c34d80931abd29dc02a5b2cb4b56d6a801309509. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA62303921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9333588dd9055a26b369c99ed04d1f3b0bb31642f2385b64cee65cdb08aa88bb. 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/QZDA62303922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c250f4e4b4ae316312179b6c34d80931abd29dc02a5b2cb4b56d6a801309509. 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/QZDA62303921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a621d6578d24372f569e2e2f01377f7d3fa2fe2c3c416f7d799f68da6329c8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZDA52375174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325262376f7855d9ed2608c1469250c206c11dea07d31fe42fc1b1cb3f9e31a5. 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/FR7X62400070.
L'Don & Compagnie vol.2 : Starring PAPI TeddyBear & GAL
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292c03d9f045b36a133a860f798d8d0f772f926f4a8c0e7297d2de0ff001a9e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZPLR2330619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb08226ce5aba349288452a00ecf7a23e7cccf72a570cdfa212827e2aaf04932. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN62392232.