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 0xc5c8e106b10f9645c8138048973ba6f0a217f63a4e9a483e79db526e7f176569. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf92de8-9aba-48a6-a499-f78187e3f5f7.json and https://artists.proofprofile.net/proofs/artist/dcf92de8-9aba-48a6-a499-f78187e3f5f7.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 0xdac62c1de867b85d67ce2112b7f2da9c7167e4d074ecb061c73f10ce08927892. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FICQC2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57029f430e4e2d000f60c04f0957f662c42c07e7e860d69ff0c827b6593c7c56. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FICQC2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc697bf0b510fd305c504df78e3294457404b66d3fc389c2862d881f37553d8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FICQC2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c609a661b3eb142b3139878919eb4523d71b69c67a989ba8751d401d8ab7b. 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/FIRJF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f550793a9b1cc359d2f730fd796f6c367d1ce591c35c5eae17cb2f7103b49b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FIRJF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c75a21266044f4f1797a44a614b4ec36e1fcc2028afab004c35221994a6d892. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FIRJF2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b40dbe40e585dc12a76696f694cca057823371924f0b12bdccbcfcc351fcf33. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FIRJF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1829d903538ac8ff456e7e8eb6dcf272a84649ddd4010c3804b30adee5a621. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FIRJF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fba776d2aba349c14ab5ff8e2f17c7959b140b36155cc5cea79c3f1e6d6aeb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIRJF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cad069797d295ea118e7bfd2d02e3d2a90f2ed5146eb794f8a629a931b8613. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FIRJF2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8f66fda7af6e76047c9c5f5413776da1e3d5ed2e05bc40183412f2b992ccc. 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/FIRJF2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807db768ec14dd19ca8ddefae7ae5b23a5c8f3c290ebd40e9547f08b63728d9e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FIRJF2500010.