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 0xde9a47e7d343b65de343af714abd9566c693bf132f80299e52f091eb90232edf. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a52b94d9-4235-4e06-9de8-bd923958f4ad.json and https://artists.proofprofile.net/proofs/artist/a52b94d9-4235-4e06-9de8-bd923958f4ad.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 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 0x6281c6e8a3e8a05d531d8dfa38ef63a8f088d18965e381eae4ab4afc9802f038. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEH330802025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618193657b5b7609597b372af8b4b9d667710af5123fa7a3dfdf5ec140caca6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZ650509992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3464520dd1bf1b2d71e65629e09149dcb80d3271a4660c7c98ea146a92f9611e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLD682002350.
Terra Australis (Jorn Van Deynhoven Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca84efe0b01f8f83021b0f936371207aacb43386ee08b44d9ba61e3556219f2. 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/USA561381880.
Maretimo Sessions: Sunset Del Mar - Pure Sunset Feeling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d8f713db7205301b78f8d793c191eba8b4bc53ea2e191fe9da69febc13bd8. 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/DEH330601801.
Maretimo Records – Masterpieces, Vol. 1 (The Wonderful World of Lounge Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d8f713db7205301b78f8d793c191eba8b4bc53ea2e191fe9da69febc13bd8. 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/DEH330601801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618193657b5b7609597b372af8b4b9d667710af5123fa7a3dfdf5ec140caca6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEZ650509992.
Circling Elements - Down by the Sea Remastered Mix
Maretimo Chill Radio - Best of Vol. 1 - Positive Summer Vibes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7bfdcc689eb98185973544834ffb19e5600eebac0d4b6e4877da7ae5dd44d7. 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/DEH332203966.
Spring Lounge 2013 (Sounds Like Sunshine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a769642e5c4fdf748711196e797eb6d8120b76f73f6ab08d7fa942c4727cfde. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEH330600042.