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 0xf1707545d0b0aee20fcea115260823c485a337adb966c9245b5372d4ed2ee5f8. 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/68259ce0-22c8-40b0-bd30-01737dfdc270.json and https://artists.proofprofile.net/proofs/artist/68259ce0-22c8-40b0-bd30-01737dfdc270.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 0x35493a9d9e9e3a83a2e576b9834f34cffd3eb72d7fa4eff8c884b721b2ff6a0b. 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/NLZ542301300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385f273259fc2d0611e5aa187a5fdd9e53c3f4777ee3bd677ced5d3bd72a8586. 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/GBSCL2200009.
When I Say You're Mine (feat. Luma & Notelle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2ecdc99c36469dd975ed19853d1845b678e0616fcfffc2642e7bc250bf6b3. 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/GBEWA2101904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2ecdc99c36469dd975ed19853d1845b678e0616fcfffc2642e7bc250bf6b3. 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/GBEWA2101904.
Dive In (feat. Notelle) [Dave Summer Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f9105d380c5791e8e970ef12f68bb62c26a46d841b1cf86cfafe24e267e9f. 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/NLZ542400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf7a6350581e632496b3676684fdae871ab4af60a60c880fb765cc2d3a8e75. 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/NL8RL2320758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee83c7c52f47d1c54c54e2cf70e07a8ad39f7d77cf0ce1545072ea41821382. 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/NL8RL2320759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaaf322e6dbc1d34d3faf844e75a573e66b340dde1ea661e178ab73c5f8c927. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU2422622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded8b1c85b6bc8bc43c88df9ae0bfac233fd1547625e8dc0032d3b30f94227d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLF711811690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad5c739c4a1c7901f6c9ac77e75e1d23b4622948d5eaaaa2ad4062e52e697a. 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/GBEWA2400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e67824f2370cf0f84fa8e37c23192e1f73a0117d05045d58e3fde8a676682e. 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/TCACE1591775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9a6494c3db95c64f7dca6357cb6492e43898e51207fae9b276598ec10c40a. 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/GBLV61409156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa5773c72d981020e30b11b42ab1390211e1e107f7fecd53f8b942d402a52f4. 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/GBLV61409157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7561d48affd1443d9844d17c8e8a6eb4d426b78e87f7fa5e10622dffd1a8200. 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/GBKQU2466678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf7a6350581e632496b3676684fdae871ab4af60a60c880fb765cc2d3a8e75. 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/NL8RL2320758.