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 0xe75abf55b486d0aecc399d5ce7a979bcbf5467e46515e0a25800c0e495b0c01f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/648af8e8-c680-44c6-9e29-fbb7f3435814.json and https://artists.proofprofile.net/proofs/artist/648af8e8-c680-44c6-9e29-fbb7f3435814.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 0x115b72129bd36a885d9b4610966e1ad602bf1321794fd11730c3b942d169038b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2470552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bec12ccfd76e47bddd193974c8d39802d350a06be3c5d3af9aaa7e5de7066d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2420712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd190c82532337defa0f6768f4106531badc069bbf080cf18057d9e32f3b96332. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US83Z2426397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc283c11fd6fefed5f21971e513a822f493fc619b7701fdfa13775db318c1b20d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:37:22Z), 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/US83Z2515227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2de342e6c4f32fcd082205d47f3cd0b09f53c61d0a6224b3fe6cb3daa55f9db. 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/US83Z2508382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece18023a5e4d3c69c17c4e204dcb5c84e30e3d4740e889a2e8c75dc5f424182. 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/GBKQU1991429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155fe4d13b015353cb4886ee090ab746c2539f87428df9685e7173ee599afb95. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2095306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fa5727533efb4fdabd2dc5dccf82be50e860552942dc9e345a097d5de82c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62028259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b880131cc233c491d03a8adce83b2fd25af00cb8702a96fd79e39a8670395. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:08:50Z), 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/GBLV62028261.