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 0xce2c21f9c7ff134d98780fe03134e4c409ad57d602549b1ff51729d9460a41a8. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecd06831-637a-428a-9f78-26a2fe5a75d5.json and https://artists.proofprofile.net/proofs/artist/ecd06831-637a-428a-9f78-26a2fe5a75d5.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 0x2d2678411f5235c3e8556b2dd27f84d71b73651a0806d406959288e45f74ea2d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CACWV2013280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9d378d32adf1d968247a7820a03e1c4ee0b94c812f806fe5da30b33ab0a8e1. 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/CACWV2013278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd380dc42d4e5ef84e69edadd7ea48cef20cf7ebc54ca101244479305006908a8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CACWV2013281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4f1e0abb5fef95731fe5744739eb18d22b2a23b4bb1d8e05de4b77ca68d0b1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CACWV2013283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383f1d7761976f70906d1dca99691def78b1a0e40d70b73d0c9f581463f5a7d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CACWV2013282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c74ff77b61a4abc31b172a3eda2e7edfc4dec77ae36a40f76c16d177a858f3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CACWV2013279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d02f68aaf5844f77207fcdc07d1ae3312e511fd0a97a7a65122bd5f6dada123. 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/CACWV2013277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ec3cdd9fdb53c7b1ded6432dcfa5c56ad539d0a1eb923d97df9d7180b8ad3. 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/CACWV1920114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f56d2269322a2226d01b54df7bbd38d6610e385ad3cabc2dac9a38da66691b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CACWV1920119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea974325186ddbdcccd40ac1d54f14d7be28a0a64bb7a47227b2fc9dba1c0a1a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CACWV1920115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2fb7cfccf1ded5857412670815f637a053e50c206414e020a15bd0f916941a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CACWV1920122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7e0a1efeda52982a1ca5891d3ea7451a59682cb7e990d5f903e7da1f9973ca. 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/CACWV1920123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4bad196a369ec8e006da3abda2464874f5f499f309f37f3b6d9e01475d3c96. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPJ491900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32aa9b5646845cdc7caa13be88b161bed24cb9f060cacd941acd2844258f675. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPJ491900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c2ab8783a10d388ecb110de34b2f48aa04b89f363002f3411a1525434c3a2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPJ491900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e33df4d33e41cfbf76d6d539ec300ac9dea4f7f4591666c294b60a4702fc4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPJ491900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d45de05df658493148333ae78d9e2497cf877bb5a680ed65153a9c5fa4fd8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPS801850157.