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 0xae5f08c487566d7138c42d7ade5ed11515dba7951e17352feb632a19440abe0b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b6a2f7-b9a0-4028-a099-fbbdffa07ed4.json and https://artists.proofprofile.net/proofs/artist/47b6a2f7-b9a0-4028-a099-fbbdffa07ed4.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 0x6aa5399f43f05b2b799a74dc65209a61e405f84872f4b57712239b2903d4b3ad. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:54Z), 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/GXEGQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0296f9445acf86d20d733e3ee76173612f6052d039daea6dac6f62fac5096d. 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/GXEGQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6762a395867d1d858decf46769d8b6f0ab7d3ceb8add2ce9e50800b249be7e0b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXEGQ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa5399f43f05b2b799a74dc65209a61e405f84872f4b57712239b2903d4b3ad. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:38Z), 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/GXEGQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff92bdb76a6583a47bbb73ac3ff6320e87a0e7df5e5829dfbbfa9b809c75056. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GXEGQ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843514e90ae9c2f3295bc953f3002391456ae56d3a6566477caa850e24bfde55. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXEGQ2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33a04f34aef69c8a4f9f3b75078777fde30c75ec9eb5ec5b34a608d51f535b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:27Z), 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/GXEGQ2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a2c8625ac607317031b2ea78ba1b12449bd3385361285ba221971037ad99f7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:33Z), 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/GXEGQ2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948354d95e6d69382fb97c2a4ce458da799c6964000cb83060a16b0b90815bf9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXEGQ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c7a000643fb2752f9db1cc9387a2821046ab02e2f6436acd74d4be7941162. 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/GXEGQ2400010.