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 0x55cc221e55f7881a5aa603c6ae8897b0cf4085d8aa84cb78852c0a7a7bd5159d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5241b9b-54fd-4671-9179-e7f3a54c0dd5.json and https://artists.proofprofile.net/proofs/artist/b5241b9b-54fd-4671-9179-e7f3a54c0dd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Warhammer 40,000: Rogue Trader - Expansions I (Original Soundtrack)
Turbo Overkill (Selections from the Original Game Soundtrack)
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 0x69569a99e50a0e87052d8479756e5d47cfa2e6eae09f3f3d563c3723f6fff1df. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZ6K42300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2b3464289a8b3a8d4873397bbd4a6e4fb4ac95fd281efa2b0efc88edb77ac. 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/QZ6K42300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30435945f13ea90d2a9c57d77fa38314b38c10d20a55a5415fcffcb3fbf9ec8d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZ6K42300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df10a62044fd7ebfc10cdb57c74af6558344b7104bb99af8487edfd40360932. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ6K42300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf032d0f0435a93bc02150cf52d2f065f0d37f040fe2310afbc65fef6f30fe9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6K42300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf380e592ee302822a46d9442e3b9d2ea3e1bf0df990e0c42230b75846a579. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ6K42300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca9eb671797ff3fdf4d15301caa2535619b07b8de0a7c077652be757f081895. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZ6K42300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63faf2b6ebbbd58e5dbd93445c83b9f9df61fc01c7eaffd5c2996686ae735e4d. 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/QZ6K42300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c11c7fc4ef43ff076b7bf7d272908488ef1f269e1264aba0b30f08992289d4. 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/QZ6K42300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733545bb314daaf786b870c7ec37b3bf3a3ba3b02f9860dca2812e5f3f1fdb60. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZ6K42300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc740f370a9761f7a74a2bdaac232074ec0f8bff034c6a7051aa4e1cc05387b64. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZ6K42300334.