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 0x7ab3ca6390c3c29e6951cdd2dcef64d6256c4f94e28f41931fc2527de381180f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b5426cf-a228-462a-9930-6d12f87d06aa.json and https://artists.proofprofile.net/proofs/artist/5b5426cf-a228-462a-9930-6d12f87d06aa.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 0x721983c0ea522fccfcc1cf6f5131d7868f2f609e322a26239733b72f6c4c4950. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:34:48Z), 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/GBSMU9946190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848cb80f633e707912a949037b4bc65f87cf2238c80989190ba20f34ead9f44. 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/GBSMU9946191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684abca97c9f16a262334abc5a864c1bbb7a8da2b0d88a9c0d2a7f2bb0ebc60f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBSMU9946192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7832355daae9a451c1f1866b3209825af2deb429799ca29d935398dce4ecc9e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBSMU9946194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513439b61485f4c022c7eab33e06336b703ada7c1b23e5158ff2289fefad8425. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:52Z), 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/GBSMU9946195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3112d740dc3a5ed6dd6f9c79bef55fe3da9299dc764d4ca289772333187f2005. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:31:07Z), 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/GBSMU9946197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffc3a484ccb0056766e3850739b5e5d95dc6d3119b1534fd8b83ae81b04be9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU9946196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8adc7e5011b586f961b5e968b3649544dbd8621acd075138e711ea19c533e69. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBSMU0014620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74692cc6cdda5a7ee7bafad08e336285da6d8015a15987480f6da40a612332df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU0002811.