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 0xce881944b2095fada9dbb0533ab7927848a5e698c2d80f9a434d48754cfb7749. 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/0e239a3f-8154-4c64-8f35-d06951aa57bf.json and https://artists.proofprofile.net/proofs/artist/0e239a3f-8154-4c64-8f35-d06951aa57bf.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 0x85c274aa17d7d18ab1b3e9fb53a560b0ff79cdb7f2469a5f89c5b7fe7fd129d2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DE1BG2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18897340af6a738c541f1137882642612677d758edf1eacd92f7b68b862e12. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DE1BG2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0fd167eb74d90214e1600f89c4a65f0de4f246f5a2fae256256472e5bc100a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DE1BG2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ca0d48c2ac9bb1fef31284c725421b97a96f7552c849193e15b744502e1989. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DE1BG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1028f8e6e10d299c442d8a4cb8d577764cecdf072b7bb35da4943f394ed69311. 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/DEA622100603.
HOLLYWOODREIF (feat. BILLA JOE & Morpheuz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17865bd1c8cf3c50c0dc1444f6ab95f0dc97592eeed091d1cbb67b2d7f69c95. 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/DE1BG2100005.
ICE CUBES (feat. Scorpion Gang & Faroon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6dcb0923485d361018a0643f49081547b88da54d1cc1824601c2d1b620680b. 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/DE1BG2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168c170b52823c396e37194b9baf834b426fc65032ec2fc8b84cb06561fa56be. 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/DE1BG2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c1a7ce64e1ba788e36794da7ef6f9a4c665c8d33a8967c8f4828874cd28ee. 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/DE1BG2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d632fc2e730d2939b9d43611f1cbb9a37c814eb3a6a17e35e9e4bdc7cb64a. 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/DE1BG2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec41c46d758c983cca8d05c1da3f96ab99528e38f4c3e459260c8a9fd9f3ca7. 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/DE1BG2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcb7a7ada6855993d3c3dd52eadd1c7cafdb7af5023d9c9f26092c1b13752d2. 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/DE1BG2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761ad5c9412184e51395d107d50323ddbba433bc7758447d0875b53de24054a3. 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/DECE72106208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6dcb0923485d361018a0643f49081547b88da54d1cc1824601c2d1b620680b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1BG2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4abf433af45dca3372d4b0b2824abe30d710e50ae1912293ab34d3906984bc0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA622400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4abf433af45dca3372d4b0b2824abe30d710e50ae1912293ab34d3906984bc0. 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/DEA622400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4abf433af45dca3372d4b0b2824abe30d710e50ae1912293ab34d3906984bc0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA622400013.
DUMM (feat. ALECO, KOZIKOZA, Josethirty5, Cave 110 & Jadi435)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d8e0c54f94ddf474f3014173b378b0b610fe87d42a62cbff9537332eae2a7. 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/DEKF22401678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f17cd76465fe5a60cc7a21ab6e74b25b4cac22258d400618739c75275cc5eb. 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/DEQ022101898.