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 0x2eb1d75c54cb35bc7178450675d0e4772ba68eee73c848d41096d13351ba3eaf. 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/10d0c46d-f686-44f3-a0bd-242eebda4128.json and https://artists.proofprofile.net/proofs/artist/10d0c46d-f686-44f3-a0bd-242eebda4128.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 0xf63bd3b3f61ce325c91d092f743c9576292269569a7cd8a7d3029bd0d72b049c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:46Z), 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/QZFYX2282201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7cd5de00a58a12f8be9a91796499f01b314c221ca7b01a4c933cacb30bc30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES52222165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f00b8b62c32775e0ab6e5b6a8ba9d6cd3e3cf3fac5bda8a08ee127542bcc09. 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/QZNWX2239260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73f05a7e39d3e509aa0ad75d08ce6145d8410cf9555f77eb607cd695bf9c4f1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:27Z), 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/QZFZ32365817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d37091d6095af771bf01c2842a0a4c4a826179d62e1fdbb33665225df2e14f8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN82363840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14900a73d121af39f9ef11588909190afb3eed304b52c3f24432545b0631e279. 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/PT2KH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7321c0288d487c78d97a794471d73812c9130348593e6106de3864ac70ccdf0e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PT2KH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdce39d58777ab9f382b456009282cdd34d773e98486f1e793ff4999590b701. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZTBF2435244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f491abe4166e360aba8a4fe7c1fd76740dd1ce0537538d8a0c007d99961c0c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:18Z), 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/QZZ8B2454630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac202d1e4939cd306eccd60b7e510d95cac52e07b51deb1a24d47d8ad05dbe0. 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/QZZ7V2473017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89953b191933ac70d7db0655fc519a3bed977cd679df77a090fd635658376dcf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEM2587322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244e736ea3955d20c2876c7f01cb8a0676ca9ea56ac96665c99d8afb9f98c414. 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/QZZ7Q2500584.