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 0xc839fe43c453ce5bb4f97c35fd102d62f9594a4cc65fc9ac95a7804c7f7439d3. 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/beabf5ee-79dc-42f0-8ff4-c42a27d58283.json and https://artists.proofprofile.net/proofs/artist/beabf5ee-79dc-42f0-8ff4-c42a27d58283.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 0x3bcc1e111a9d0fcec534a128e0fbc2a69d86682dde3d9c00aea4ca2b1706a077. 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/TCAHC2369191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf068cbed61515bfef7caf8fba14537a11ca3f03ce6dcbb5006016a56df22fe91. 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/TCAGU2341720.
How Long Will I Love You (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249d8d2cd1110ea291abc726b38e42f0e625386d72e49289e2dc822b2693cd5. 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/TCAGR2278602.
How Long Will I Love You (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536022002afaa8104fadf2e10c0ef8fd216b14d14f445641be6b9675de27665d. 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/TCAGR2278619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684afe9cf9214e5b3c807c9bae0bd9292b39ea0b586f862412ac91663a470247. 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/AUMEV2297664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5223d46197ac89cb9552c6ff4f4d4d33f2a1f8cf5e184ec7b36667d3e346e3. 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/AUMEV2166187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0b2a2f3e4fc9b89319d596f150b1ad174b57d260c86c7afdd7df6c4e44efb. 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/UKTE82000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99134aac1c0e9f6ea9d57f52145ccbb602ba09a2de760d31ff1a43686972e20e. 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/UKTE81900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ad1792be1327c5e6a601bf874dd608ef9efba56ec643cf56bdc51299388c12. 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/UKHAU1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170bb3d337796fa2630383ff461a14ff6b4723dc9b6601ecf632a5c24e1e298d. 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/QZDA61856685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565ed98d19782cd6619b66d2878eed6c944b795bb85e9e423baf4404fa031a6f. 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/QZES81884935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c4e3b04c8ab7ba94be3163db0e4ddd2c79500a44981480e16436f78ffc3f3. 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/QM4DW1818290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06d46254d6da47471c070f331ede9a7618f9067e1ae36462c7605e44851533. 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/QZES81825081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae3b9878cfb8db1330b38486919ec679d3335b1f5a180fea2299dc57beb26df. 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/QZES81884936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bbe5ae9645dedc36181991d8806a3b976989287b861387d7d8c3efac847874. 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/UST8K1895968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92c2bd775ba00c6d2ae8081d52f30fb0433857bd080f866d4586798414db5c. 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/QZBRF1817051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663913be6c02b3907cb0ce95b0b3c4d1f4589ce928bd182fab7884aa3f8b935. 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/QZBRF1817053.