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 0x6f15c3d1688327f1085f3658951c174ac9c9f11b7a51b6a2e78baf299b1a5d48. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/705a3895-0fed-484e-99c4-820ed19285a3.json and https://artists.proofprofile.net/proofs/artist/705a3895-0fed-484e-99c4-820ed19285a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chill Morning Jazz (Relaxing Piano and Guitar Music)
Sunset Bossa Nova (Relaxing Instrumental Music)
Instrumental Bossa Nova (Chill Guitar Music)
Family Christmas: Music for Quality Time With Family
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 0xb7cc1edcfd2b007a5a5a6b6f49e5bddae54f3399e20852a7a479b3d0c537994c. 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/TCAHG2309685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be1530151970182d9000ce5dec90767fa1dfc2b807e9c02d52430ac51d5534. 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/TCAHG2310338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a91f5b7ad8e670a370a2c0b964aac3c0c41c20bae7a05fbe600a10b232c467. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCAHL2300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b2ab9e06f9d7cc6230a2741f7fbc2efdcd3b6d3975b4db1583b5909bf05c69. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAHK2369756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0987a1509792670e4120d405e34160c9d8d729131b84276a7b1a9d78c9c7742c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAHG2310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65449270b1d12febcec154084ff9382a33f56e74fb0e2e8745454b10c6cad39d. 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/TCAHG2309914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ebdcfb6c32155f6acf49adf6dce292e51eaf270598bf2083ae458c6f1b2d93. 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/TCAHK2368514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0c14c0d3e3d85f2ec2f3b96493aa2e9e3a9de6d5cc4347422912ca68d70961. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAHK2368188.
Sunrise Jazz (Relaxing Guitar Bossa Nova Version)