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 0x0a5ddee05fae43902325e5ee2f0cba1da2f8eac76ffd9f8ab574626eb53ffb23. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de93c918-4a36-4a30-9cbf-e7daee166e62.json and https://artists.proofprofile.net/proofs/artist/de93c918-4a36-4a30-9cbf-e7daee166e62.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 0x42d170d0a8afccf16c9bc5c4189a7405507160386cf53d3d2a0d4bba167fd7ce. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEZC62448012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b18363f6ed5045966fb98227909a061deebddc6bd70ccba7374670ef00c5dc. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEZC62447783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9932dfa3753fdf584bd961f3aa25195c7aa3e2238181a60adb8b68925f6744f5. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEZC62445606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3cd521e2c8000eb7263e1c8bd40d1724532cdfcd5ee59bbd8dd4dae4403e53. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62446248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6e416b37fd8434aa1b1d63ecaaa55e08682ef85adf1c4a054522b4b4ee16f4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEZC62447784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec05297027b0c65aa91f60cd3950ef2e016193f36a03a43d53e3513bcee5865a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DEZC62448013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d46a2a5d2cfea68e33283d6708c476d6c4d8cf828eac6226e6f733b3b2e6ec3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62448014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dd768e7569407f8492eccdef174fac184a3676bb6d1af9e0d8f985b52823a3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEZC62448015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d708c9d22eaa3ba007f9f2808c4cdd48de612f0d63f372477422a5fe3d9339. 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/DEZC62448016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d92cd93715a4d311326f3af73705c541b7ee3fe20bf95124a9b615677fa8025. 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/DEZC62447629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33810b0259f94c8d9fac91a566ddc2e7d4bef0bc7295a7c89f655ad3e054e94. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEZC62440745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e32eb24bab5dd1d1563ce7a19c6951d8f6010a4c057a8b725ac8cb9376f010. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEPI82114623.
La Verdad Y La Vida (Days Before El Camino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da663ab4ea62ae065e21a58232e43c214898c5e94a18d27b736eacdece4be2d. 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/TCAHQ2368141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53573bd966e99fc051d51fe41ea916aa00e732991cbe8f63604e1f7bac1a7851. 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/DEPI82211281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6e416b37fd8434aa1b1d63ecaaa55e08682ef85adf1c4a054522b4b4ee16f4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEZC62447784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b18363f6ed5045966fb98227909a061deebddc6bd70ccba7374670ef00c5dc. 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/DEZC62447783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3cd521e2c8000eb7263e1c8bd40d1724532cdfcd5ee59bbd8dd4dae4403e53. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEZC62446248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9932dfa3753fdf584bd961f3aa25195c7aa3e2238181a60adb8b68925f6744f5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEZC62445606.