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 0x9d8e5f4adfd5f3e6b83d61e0b738b74536c50f150bdfc555b0d8d03f5e4ac158. 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/2a4f6a38-3887-4283-8ca3-84ee22d75a4b.json and https://artists.proofprofile.net/proofs/artist/2a4f6a38-3887-4283-8ca3-84ee22d75a4b.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 0xa40efdb879d1572b9ff7e88c0ce1192b77bf39d9d5408d19046db6375cdaa486. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GB2LD9512002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826940953e33f2573d4f6c773d9b375837f018eacbd4f71a83da3770d9fd86d9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:26Z), 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/AUGBT2434234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06fa1a380236da2c144e2eb90ee484a7b45d7e67b060d8e722d035f9f99c925. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:40Z), 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/AUGBT2434235.
Urban Style Music / This Is L.A. (Remasters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74635554958d5f9375c043cd7d670bf24758a30a3809f908d5393fcb2c29171. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBBHF0930050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3221b1f4234d94d7bbd7cf2ed5d6f0f4b569401164934713c496c7329afadfe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUXN20902904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe7949504ce84d8f4f42a233e262ca0d24ee830fc780377ff0aafb2001f1f1. 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/AUXN20902910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b8c1e61b2dfc507d6103a5615518c1bac0ed6c076e67aa1bf4b902283e6b6. 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/GBAHS1100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c764f2035c4e311d8dcc9779d7cb1b8922b374a36339bca59770052b5f6011. 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/GBBTQ1200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa519d4e9f534d61219f80de9a304e350e52507832ed5454faaaa53879a1f1064. 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/GBBTQ1200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ab667a6088d059fab4d41769848078a8b9f75877058f9cc9b6dfbb567f1d16. 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/GBBHF1319540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a71ca688ab446d3d11ebf0fe23257c6bf8e5087f9ab06cb8f80485392f51d2. 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/GBBHF0720219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef88c3caf7a271a1d091ee79e3b722e56cfd1db6127d6b04ffe01d0773514b1. 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/GBBHF0720227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ebdd616c595754b5db27dc9e7559d38d963b22ff9082a6ad72cbd807c2597e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBBTQ1200077.
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 0x3eb84e35076c34265f6460a4e3980d55345ae2a87882b5b0ccae47f019df7851. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBBHF1319537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beadd2fba2e3f2be014e687f48ebfb4d407aa8c9f9704ebf18dae2cddfefbb2. 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/GBBTQ1200085.