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 0x03748f9e607facd9a1cfaabc84a598e534ab627332a33c1c181f4992c3da983e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0c35e89-6f9b-4557-9566-c9d737b2f9a1.json and https://artists.proofprofile.net/proofs/artist/c0c35e89-6f9b-4557-9566-c9d737b2f9a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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 0xa0f8967c1af9d37b42952e65f94214a97776c4e9191dc15b8109fc82ed392cbd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA560867607.
Brandenburg Concerto No.1 In F Major, BWV 1046: I: Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ce9d9432c82322b788441836cfd92ea1f0d3a573303620320beea1f60d7bb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA560867676.
Brandenburg Concerto No.3 In G Major, BWV 1048: I: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9f65642c8bd513e632a5ede1fc114f3d06031cda66e441fc219c39fbff73b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA560867677.
Brandenburg Concerto No.5 In D Major, BWV 1050: I: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288d8e82d1adb87f23349778d7589cde59b4bbb00900a763c7f24fa7a9e2df6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USA560867680.
Violin Concerto In G Minor, BWV 1056R: II: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3317f9d500d33f3da81a4e6f630f4a56f50f635da50765612aa0f3e53d55500. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:24Z), 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/USA560867683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a8f83af20c3ea2ec9be1e8ff76eb4e397b9386c4c31ffed34f98e5e6074990. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:49Z), 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/USA560997494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0234129014115c5db1c6682d2d53d50db479699de8585552e90c53a9acff6bce. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA560997497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e5a9e4e57c3c05bc2066a2581a32c6d179d9822e5411847b1f81ce1361ece. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USA560997500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cca003db26ed5fafd432e8cc10b12076d7a9a10a032aa1e2745ac7d53b1113. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:23:42Z), 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/USA560997503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6463b09a75e25c16c4f0ddb7983e87666efbf4842c54e80edb69fd2085902480. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA560997506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc5f77cc051b35f34b897b6345967cc7ce28f730d4590516c42a858e576cf5e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA560975573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e846b45b677e8424dbf365a8cf93e2f6c3a388753f117544b88354f37c0716. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA560977007.
The Library Archive - Funk, Jazz, Beats and Soundtracks from the Vaults of Cavendish Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e0b9c73a0b6607682db831f1764066726322d5d5fa7010383e22a899f8607. 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/GBEQT1700080.