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 0x12d2dae7a92688c07e6001ecf29f6744b008f2c54efb61d077dec3efbe93dc79. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28f73fc1-00cc-44a3-830a-a68c51539afa.json and https://artists.proofprofile.net/proofs/artist/28f73fc1-00cc-44a3-830a-a68c51539afa.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 0x7531c7117f8fc54313897ef9bcd1ed7b16e8d9f47acc2a7be6567522a03102c5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH6542265029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5754cdd3a360f88d4d5d15d67d09a453f8f1b0d3b9a288e0603e41c1f0d1446e. 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/NLRD52222794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe723b5356b3df30917786ffd8bdc41d426cdfaba240ec9d588ec207325e1f65d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/NLRD52316724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263a09e121c773f1cb8b925f8e11c6a431997468497a6a967f97b99618b9450. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:24Z), 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/DEY472470545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a76d828645a4114e9bbd0fe5feee095f859f079b93a0e140b4869469f7bfcc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:56:19Z), 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/CH6542435799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdefe206a29b1b922dcb6689ec0e63b0fe6fbda256f7e1335121c53caec981b2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6542442433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1b18d3e9e86f6c3a833d285f9175b2382a71793a469224f8d25b8534ccad96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542534243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac9ada7cc70718ddf498f720904869b9c4aca9a54c7d9efa11bcbd76ce29776. 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/UKACT2232694.