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 0xb6c5615ce8996f1042009ed177f8f0e922acc184b81cd35b0aafeb9fc2ad09a5. 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/3f64b94c-2847-40bd-b2af-79dd5c6dabfd.json and https://artists.proofprofile.net/proofs/artist/3f64b94c-2847-40bd-b2af-79dd5c6dabfd.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 0x2053ffa80404eafea0c495fc2b759d3227f79f7d9ce773b25135a6b15540da21. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2033191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a8c4149b0478f390ee87a42c3c0afc31a1f12756b26beca2e90bdcdc9377b. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/ES71G2033180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb86a1b95d9835864abbcbdc1b1f833051088766bb5bb4b426f424ebfb9fff4d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ES71G2034057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5723b66550785e4b4a9af6ce22132408fdd3e0d6ff1857b898bb67b4780e7107. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ES71G2034058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61556f9329017ab61eec90ed2288f7ab17e9711867c0cc7629f39fc1cce6e46b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES71G2034059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc27bee133af8fe51ca173d058ae70a2d29fd133de3c9e3e96e5e24dc666e194. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G2034060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023c5ed94937397f0db2cd951fd4c6fa6c131e2dba73c76c6cd5329452700835. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES71G2034077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9898242d750c651f8eb2b49118f5b2b2f9b4872d1286b24003b609f294f4a0. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ES71G2034088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74592745966988c26e71615c11e7c160cbc2cfd6761ab0416a8ccf00c37aacc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES71G2034090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3191df26fc92a1e8998b68eda120445d81d3ea23dec9a4e7cdec89b3f5cf3f7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ES71G2152745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c2c919686503cc9c0bb63abdd591604cc0e2396b6bcb39970d78fbde398060. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:23Z), 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/ES71G2510666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc622ba92e6f541c33cf12dc8c594f26ee97acbd3d7015729d4119808fb6d71. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ES71G2510665.