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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61b1766e01bbeb6fb4ae3869475ac16ee043271ce59fd91919acbfc30fbb0a. 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/3d771a70-7d9a-4277-8af9-dd9e13a4d023.json and https://artists.proofprofile.net/proofs/artist/3d771a70-7d9a-4277-8af9-dd9e13a4d023.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3294fe432b540773679b1feeca38f8be63f906a49cd22c5cdd1d33661a64bcd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:59Z), 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/QZMHN2023325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c5620d63000b92765a9295c50988c3172ccb20f2fc4ea36087abf04b0ffba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEQ2247402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb323127c1969102d0125845ea88da6ce6da5dfe721641f50976d3b01afbff. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6Q2235059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfd696f7a69cd90174b6a73cafc59246482f9aef29fa535ba82f549704967f. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZMEQ2247406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19872939ef872da8457843f010cd7203ae7566fbe4b9b40b23fd8abe820608c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJRC2269467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa327e517206815c92419b42fee7ce9a423cccb99a6fb0f6f101002efe15ee. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN32362241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985774dbbf5fdc85da170a4a95a4bf6d02f88262631f24d6ee049e5a0de5ca53. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6K2316100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882ff3f4368156b89f7d6d69cb51671117c9fb779ed499d33b929679812a8ba. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB92384216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f94383f7350cf71124c3ee4150ff89565ab42ebeef84199544af69660aee0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:40Z), 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/QZH5E2344842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0a128153bb2c7ae175f0aba3ee544ef074dfa0de6b7d974b4e7358057aaf41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBA2436511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c48c3c38d7759c7510c5cfa5c106b7bbd3d8318f4cf987a772124c4822c63. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:08:38Z), 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/QZZ7L2405152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d722f206d5d4f1c6a4fa4ae70f0f7fb00a30f1f3f493252e3bacd94d7e7de50. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFW2582651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207fe9964c0e5ed59a840d2fa251415357d3569dd19bd537b1c036c0c51420fb. 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/QZK6K2394357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d480d92330a0b267071be5825516e427a1d5aa4dd50806510708d7a311020. 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/QZHN82339653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1cabe840d5843cb3ccbd6d54be85c56ee62eaf5ebcf0e44bf0aaa195888c21. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE62M2184521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21adcc6c183e86f616c6f98840cf2259758ba1cfcae44a77f3b2454827090d2. 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/QZNWW2202228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e46021cd8b655c22a0798a0da3c4123de37a5c614d8669e39358ee2d75450. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWR2253301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06976157625d760db7294e9ca55bf18be8e21381cb5bdf9d68684fa15e37ea9a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SE6XX2205818.
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 0x0e2e391a0f762dd3a9be4a008c04457388df4469431e430802964020b94b710c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTBA2277341.