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 0x63a68c89af1aa25c410982f8c323f2ea33af5556852dca37b1c9b056a3547f9e. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d436beef-e148-46c1-a2f7-80b0dc2fb0bc.json and https://artists.proofprofile.net/proofs/artist/d436beef-e148-46c1-a2f7-80b0dc2fb0bc.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 0xb81751b0cc0c48aa63ce8354a87e7abb8e318a04ea83f99b6bbf0a435a02adb5. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZDA41931362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf834ccabbe5469387f8d6537bb063abd28734e7970f04c2b175db92e7717d50. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN42001047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7f949cb548538a923a4c206af6497223c71acf95f328bf11aa62ebaadd179. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6H2101783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f37fd6b016b89817179ce23f4cea4fd1ec198a9429312870a792c70cd417313. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6H2101784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba8ad1bff5a69bace84709f05e54cf03fa5fe9c8cb0fe1fe2280817d527681. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWX2171419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f33bf0b80fc241601882448bf43fb003f6f9402c136dc5a7e5f911920bcb329. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6N2346767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839be2a06e81cad7d9142f0e4f27dde49adcb02c5c7b8b6988cdb9d9c37b9a64. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ42484202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d0dfcfcdc238466676ade8dcfa8d9e843902a19159bfba1c68d15765eab14. 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/QZMEQ2475395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d3ecb3fadb6de0e53d61d70e309496315ea67c59f085383e0a22abccb59281. 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/QZTAX2479993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d81400956b3d325a16b3e92c881394b1808532d572920f7690c998d81854b05. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:34:19Z), 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/QZWFF2432612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff87a0a0c27c95d1d76e7519f8124ba6bf161ed3ba0199c8c6e88576a870ac7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F62514145.