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 0x61ca4a5f7acf6dbd0e7054a4abd6029d00de25057da639453cfe14016e9671da. 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/787574bf-e07b-468c-91a2-d0c224a2cc6b.json and https://artists.proofprofile.net/proofs/artist/787574bf-e07b-468c-91a2-d0c224a2cc6b.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 0xa882c6536657e580b4df27ecc27346458bb788ec680a49ef5ed51771c42a5056. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72120662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267804e039a283362d8cf8842eebadd3d07bf362d20e72979a53790ae24ae2d. 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/USUM72121151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e3497d218630c9b92c70e986cb4b420d48955347d7100fcae79898c63812c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72014406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40dfe7e2122b4ea6aec11bd8edc005fe5acd5c14bc7b6e23937b18a96b7086c. 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/USUM72121150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace2d2577528b9e63e8029f21ebb5fbc2120e715889043342a4f82dc09fcd2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72121145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c2dcb307cc5c57866e4494179ad45b1047ac25e573a92072772d87f1560e5. 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/USUM72121153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5b85a8d8d1229e55e3b4b2b8039f8b75b66a85f04eff265c2b892d56d44d3. 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/USUM72121144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b8cbf1c4dfced62904ec532d78dfc611734c7a504b0fa0fa109012528f76d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72121141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b83c2c0c73361bb45b9c1daac3c029b98775388b2cca40f8bc1b08bb6f95682. 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/USUM72121143.
Batman (with Lil Wayne feat. Moneybagg Yo) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ce415f5bde29c2942c7b4b4481694a7f1d25d9c3120eba6445e97849f688ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72109222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2453fc317bc9bc820a1f81a3ba011e3f068cc71b760d33c737d26b6819fc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIC2490751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb2ab118fa26a6b3693574e5697eefec572a4b00a0be523f2e965e5cd83de43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edadbb2e33129f77d95c8f807f28b68f1b2acfc95c8ce44acff35df1f143506. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7811102845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485389694c2174d21c1c515c3ef34340fdd468ae6c810ad21d938977c09a9bf5. 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/QM24S1921825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc36fdae51457671afe6d3049d4bdb6da9bfa1a5f511dc123445aa4da26c8628. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAED1933026.