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 0xbf893879e5671ab61eecc09afd6e68c1d817ade84e8c4de3482fb3b33e9ea484. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80d3d897-ed96-46ab-8a92-2f0f4393e886.json and https://artists.proofprofile.net/proofs/artist/80d3d897-ed96-46ab-8a92-2f0f4393e886.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tottelematon Tipi (arr. A. Fuhrmann for baritone, boy soprano and orchestra)
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 0xf6e32839402ba8bb69596e3f6e1cd32eae1e7a6dfe4c10839eb60085227def1d. 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/FINDE0500047.
Intiaanien laulu (arr. T. Ali-Mattila for vocal ensemble and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166200f73175322366829bd2159dbe3015d1ca986ee8d12a4cdbfe5353330327. 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/FINDE0500049.
Hyttys-Hubert (arr. T. Ali-Mattila for vocal ensemble and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5addfe8c921852bff336147e007e1f93bf822077727e4cb514e14172e035dec. 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/FINDE0500051.
Magdaleena (arr. Y. Hjelt for vocal ensemble and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24f8ca20a13e34dff908f2506aaa1b8b3194330d59d32d06b229651b45b9582. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FINDE0500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183fbe2cb61bafdf4af2aaeff16df4c63a9227c969472da954370a9d2dc8dd77. 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/FINDE0500054.
Lasten liikennelaulu (arr. A. Fuhrmann for vocal ensemble and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0394f9c3d7efc4324519fd1401321c48e831379ff5d5276224c457404669ad5. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FINDE0500056.
Kas, metsamokin ikkuna (arr. J. Harkonen for boy soprano and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd20656ff61c144eda038481db15fda04fee4a26010975c872899747bda273f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FINDE0500057.
Kenelle tuuli laulaa (arr. T. Ali-Mattila for vocal ensemble and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583a9e4058fe24cd52130081064802c88cc7463b30dfe37c68634bae75392e3. 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/FINDE0500060.
Minun ystavani (arr. J. Harkonen for boy soprano and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28155bbca40c6d40ec66c596ac46aa1721cd426bc96d0a11b2cafa2a694b287. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FINDE0500061.