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 0x5d4c334ad9f0012747fc8798053ae9864615c160632f05cddbefdbe4091f333b. 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/6d594b14-9e56-4263-bd95-6c3236bd6243.json and https://artists.proofprofile.net/proofs/artist/6d594b14-9e56-4263-bd95-6c3236bd6243.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 0xc8ad69bd977f957038010c080e8f24ca95dfb614690772b70a7e38cbbdaa3063. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBACC8200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aa3e7470f72f62bec8c9a25589693a9481bb294ee0ef846ad5d4be50a81fef. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBACC8200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d7eb5d6cd6970c2cdf68cad5d05eb893f1ebf4f8402f2363ebf23e55806ecf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBACD8201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc81523885daf0bc754ad9f3d3adbb75a13e2cb2271a097ac4ce32ac5c33e67. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBACD8201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21c9108eda48169d89d5653c8c8882c906422489d643cb3cf339ee2a117b58. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBACD1700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531b4257f4a7a3b36ae18a76532fd2ba586a12e35f5436b442bf8574d71b2bf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBACD1700806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d03441044a043111fec647793ff1af7fb3c2f05f89d3c4797bd18232928498. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:47Z), 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/GBACD1700807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e8f6148894ea797e93bcd43c4028fdd176507f3a6f493fd95ea86d9c364db8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBACD8301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa847f6f73c7a4ec40c739a7b0f77bb454155d30103ec7e031a89ff2f4e801748. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBACD8301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4fc9e1147df1a2c1c01c79816677181a59b3588f460ed8caa13bead0684d24. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBACD8301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced57e4ac210edb568853342277e40ee5e602065aae7fe207ed27321117c5545. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBACD8301308.