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 0x536c46f85e9bb23162cfccba2cf67189b0a831e35149aeee3b73009680ddcb29. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/705e0ded-01cc-484b-a25d-ffad5ad88994.json and https://artists.proofprofile.net/proofs/artist/705e0ded-01cc-484b-a25d-ffad5ad88994.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 0x2962e58c48af72077bdf8072deca9506782936408b6c204170c402f4b2b56970. 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/FIFIN0300180.
Sibelius: 9 Songs, Op. 23: No. 6a, Soi kunniaksi Luojan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515f85fba2aa21c7c7e6a569ea414b76e2d1aaa41e9fa3584d9f20b5dd44bc6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FIFIN0300150.
Sibelius: 6 Songs, Op. 18: No. 6, Sydämeni laulu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0219cea93fbd63b98a9395becb40777e162b777750c5174b9dff95fe62c735. 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/FIFIN0300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8907356d89f07b3489069ea079e798c7c6a095c0b6b39201960e7317c4399c9. 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/FIFIN0300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbbb20b8231ff32cd4e998115f38ad33c527d34f543e8a7570c7d56087cf3f3. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FIFIN0300148.
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 0xbb1ff6de4f9717816bc55094b8e5f1618ae99a79a6a6ed43d3c6473db9a456d7. 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/FIFIN0300157.
Sibelius: 5 Christmas Songs, Op. 1: No. 5, On hanget korkeat, nietokset (Version for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9537f6127e0ca5d368188ed2197d4300cf6ea11b7437e0e94634078996e003a. 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/FIFIN0300159.
Sibelius: 5 Christmas Songs, Op. 1: No. 4, En etsi valtaa, loistoa (Version for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dbe1dc7ad16024f805bf79b77a88ab37cc9bb64fef8b3fd71fb231795c324d. 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/FIFIN0300163.
Sibelius: 6 Songs, Op. 18: No. 3, Venematka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a95a51ae5f642da2897b44239deac9765d28b1a1d3afba5147b9603cc5de8c9. 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/FIFIN0300140.
Sibelius: 6 Songs, Op. 18: No. 1, Sortunut ääni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d64bd9dcc039d545c424a681aafeb06f8e743b6df5d8e2a80089f0e6f28f80. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FIFIN0300153.
Sibelius: Rakastava: No. 1, Miss' on kussa minun hyväni (Version for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0fd5497ff806550252645a6a8e3522bdbbe10a10b8830924ef51111238aa6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIFIN0300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121c4585f3dc165e2d06a7ea155af170a9c196619e5572e95d56b343e1e1633. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FIFIN0300146.
Sibelius: 6 Songs, Op. 18: No. 4, Saarella palaa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd8567badcfc11671981322459d9072b70c603267a3bd7dab3af111631134a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FIFIN0300147.
Sibelius: 9 Songs, Op. 23: No. 6b, Tuule, tuuli leppeämmin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb816ccfd236575b063ebb6feabfaa7cba52b1e8e3bd605e48fd6324e1b29f4. 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/FIFIN0300151.