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 0x8dcd4a79e7a99e174b35738fd2e387ff069236f84ebdb61d14d3de345bd2f468. 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/328034fe-9af1-434a-aa6c-7e1be2f8457a.json and https://artists.proofprofile.net/proofs/artist/328034fe-9af1-434a-aa6c-7e1be2f8457a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Golden Trail (feat. Anders Fridén of In Flames)
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 0x89b23cce52b88e1ce4abf57022132720ecd8918f26ddeb3ca1993805f5d01ab1. 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/USYFZ2326310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91020297c288213e568b062a64e0a2578a15240c1dcb54d639e7f64a6a548037. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USYFZ2332601.
The Wolf You Feed (feat. Alissa White-Gulz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457255039d42d5596eb30666f6df8bb5b92743f4887de927a4f152d56195538. 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/USYFZ2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be92eb254f793414a587550cab527e5d9d44493194718746481bf7602e1dbe0. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USYFZ2288601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17d6ca2995d97d21f87e4f56ed8e6fa2e88bfcd5427cd15ce625d71404b718. 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/USYFZ2163801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafb12092d6cb7d3a1e41bd1cfe603f19690e67b0549506c6ca4950e950bfad9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAL451791507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b23cce52b88e1ce4abf57022132720ecd8918f26ddeb3ca1993805f5d01ab1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USYFZ2326310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b23cce52b88e1ce4abf57022132720ecd8918f26ddeb3ca1993805f5d01ab1. 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/USYFZ2326310.
Natel, Schönberg, Boublil : I Dreamed A Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b422be9f28326ba0001a8de1626d76b66bbf8163ba9044f0c72005d3689967. 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/SEPQA1200208.
Out of the Dark (20 Years Nuclear Blast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a67c898de2cb97b0e48581c0ec9ee4717c1cb1461add01920345bf75ad05eb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DED830799801.
Scars That I'm Hiding (feat. Anders Fridén of In Flames)
The Retaliators Deluxe (Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9678eaa2da89f79be18aaa112a3cb15bece8fb02c9b681b4f070f514f31e5d8. 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/USDPK2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb773a0c632236c4f6fb4b5bb5041c03a8574e080221d4914bac603ef224af1. 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/NLR261800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe32475d19f4e70ddbc6230568310c3b906a5307afb6121adf62242e501e5679. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLR261800033.
The Retaliators (Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9678eaa2da89f79be18aaa112a3cb15bece8fb02c9b681b4f070f514f31e5d8. 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/USDPK2000122.