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 0x15d82601b342b99b0c60b87dfd3274eae78f7443390029f3559737450b94875d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0ff8917-43c0-43c9-ae73-b43ba388424d.json and https://artists.proofprofile.net/proofs/artist/c0ff8917-43c0-43c9-ae73-b43ba388424d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Golden Age of Light Music: War and Peace - Light Music of the 1940s
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 0x372cddd6274753fb293787593be83581c23c048752d8a8a511091dbe2ce74767. 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/CH6631057101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7fd6b65ba81440b87a4b72f0803a915a5285555da2e3c77f63937127f165fd. 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/CH6631057102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b695a0bc20a6800dee80384e98f12c25cb1d2789641ce60a0a9f8b7e8c2a219. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH6631057109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b1835fb67ba7e8744acf215a5706b99fa58a7ecba68075923d5f34229fb0f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CH6631057114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6a88838f8f0d2947d90e38de764861e73ac33beb02fd9699adc226c8a6ef6b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6631057116.
Lullaby of the Bells (From 'The Phantom of the Opera')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e61c967f98a601a1fe8d845fde481e3af3c3909c7f2259d73f182fafe62a460. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH6631057122.
Willson, M.: Music Man (The) (Original Broadway Cast Recording) (1957)
The Music Man: Rock Island (Charlie, Travelling Salesmen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd5b3217a97adddb7c75d752bfe73ddfbed41f0b20c2154aedb27aa9a92a447. 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/HKI190891602.
The Music Man: Till I Met You (1950 mono recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dd7c37344c2afa6d0a13fe1bd0b2c9fc08f4bfa05a301d2f47b38ee723ef06. 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/HKI190891620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6123024784896b1219fe146fb562bb511af6163a5036ae40752e5c37f76cfec0. 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/HKI190891621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84940e169107ecb82e278d1e4d4d15490f61835e4e5de9ee83f63546bbf36f46. 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/HKI190891622.
The Music Man: Pick-a-Little, Talk-a-Little
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8284853481cac80d4ef167480299bb9ea15fa8adc1b297d620cc7994b94d24. 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/HKI190891623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf36ee6e5e95912bd089f75fe93806f78880aa6bf214d04bb91c7c6f2decf7e. 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/HKI190891625.
Meredith Willson's the Music Man (Original Broadway Cast 1957)