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 0x2ab7cc7c15000669add97fc842bbca2712ef12f57f1e20abb469691447a71a89. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f3c3e3-2fe3-4c7a-9ac0-778f01a632a9.json and https://artists.proofprofile.net/proofs/artist/81f3c3e3-2fe3-4c7a-9ac0-778f01a632a9.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 0xf164386ef1de2590082ecd885efa67e937b3aaef4834042af64afea6dcaef761. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEU672101198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57447d423aaa23e45000b373f88801020918a16290af3dc44ddde85a6b33f439. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DECY52301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c1afb8cc642da390887eadba3c153b49e43b4a701ee7bbc0bfeff4fb45d085. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DECY52301075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fb60946c746c2866f3c53bf248f543c2d7efe971b89cf827cb98a426b20e9. 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/DEU672201445.
Mathias Modica presents Kraut Jazz Futurism
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a608b28f1b6e2b41794956ae664ab09446aef74f5e6a2b8c5b0f5876543d1f. 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/DEBY41700056.
Yvré-L'Evêque - Tolouse Low Trax Broken Pleasure Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba78f1e4123a5e0876ae39ba3bfdd84a99576484a1fbb1e3a5d41c2e508da8. 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/FR89W2100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a62b6753910219076e95737da8497be151f18e328a8a1f672c0b9ce302ce8f. 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/FR89W2100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edcb0ca69f929aef578d96e4af4f8839db9379de83673991175cc21f0cfedf6. 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/DEU671500295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1bb0227c6654bf5c06922520d5d2be586cf64bdcb8cae5f68bfae63ab3e57. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU671500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcfddf42a0bbce16279f21a91ca3f5f2d3e6146efe9ef1553d74775a9be50b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU672201446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab3e98b7da21e264ec26f50f0938e51388a6ba1fbe480fa98f20dac8d031fc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU672201447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19f63a95e5f8026975b1683ba0e0f6379e5d10a301876eac24b942714928823. 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/DEPI82324237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cff2adfca0d9bd3e7b0f310733ac08273d6c657701db613522294089593f058. 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/DEPI82324238.
I Am a Dancer - Marc Romboy & Sinisa Tamamovic Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e65af886c5a73819d3c4e0ba5e6fd8ad54168a8f4fc05e142467b1aa15d2a. 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/DEPI82324234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1c47da5736fc30872dc7d7be9c7cea8c44ae17ceb9eacfa8413b07c4c2553a. 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/DEPX41500112.