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 0xdb3604b3fa6a2a39f9dd4e311246471e8545f018d1bcfc3754fb81f6b8f9d2a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0851ebc-00d8-412d-a675-806b5f524042.json and https://artists.proofprofile.net/proofs/artist/c0851ebc-00d8-412d-a675-806b5f524042.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 0x990039ec74d3a800b62a9be6811e35cee11cdd1556f5c6ee92ab2edac5b463d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEVQU1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559cfd482bcf182781f6a167260acff5ca34ae3c749cc434df654561599aa3f9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:25Z), 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/SE3Y71300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a1fe0e67d783c6a149b1a41b9aee1d9925ea91b739341159363b1de73d8e85. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE3XQ1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d6f5c151736ed8337eb108ff4e19ceff6b07ea11ba7a31f00c08fd23cd6267. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE3XQ1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d365eaed8c55df52e75d883901b26a26a721aadaba9013c387260e2dab9278. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE3XQ1700204.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d64e3062195b4c1b67922fbb2ec0fa457b4912f4b23bc0f07014ad5bb3bdc68. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE3XQ1700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4141a160431baec34d246106c89c3fb48b26660a0a3044246abc50999323210. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE3XQ1700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa896325eb5c22393f63388569b9e06ee8e9598308310b8d64c0a550468f31813. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE3XQ1700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e84cfd37d76620c5574711ade538949a71d20675000fc6a27919ea89d7890. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE3XQ1700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654d8c954ac8bdbf72c6513819cd26519aee0dc6b21a3e2f27b5243d3f48224. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:50:12Z), 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/SEYOK1828042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47fffa30b811d8a4f201ef3b274dc48d94d5a316e24107d02faa95dbf0b4e83. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:58:32Z), 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/SEYOK1839187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6053595b92d81629e0e53b2dab00133b948f2b7c6ebf638a63d95c59ed06c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE3Y71300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6d9433be35749784bba9f3170263e7dd15986cd10355c802cb9fee2370abdb. 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/SE3Y71300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800039ca7826752c24120a56d01be29c1e164cdab473382c970c867c051c7b13. 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/SE3Y71300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c084bba26f0f0ee4b3b5c36a7ae8e5c2a6eebd0e0e9786df39860ad7d475e. 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/SE3Y71300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac40df7580820512f4b4ece5f444b0ca89085311df4c39fc7db8ed35d3e75c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE3Y71300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6408c17f08aa67484f3ec993a80468c5830ea996b31c07ea5ac1264eaee37f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE3Y71300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8142ebd43c062fd502ab2c43d05ac999c2241b9338a20021ae66d94284b21. 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/SE3Y71300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41fc069c1cc5776340bf9acf60708414cc273ce4e44ed7adb4b7bebe7139ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE3Y71300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca13696e4b03188cc7521400330a98a13dcb87dde63b2d7241e749544a4909. 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/SE3Y71300612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8920abeefbfbc0b1456653da3d58fd1daf7abdcb28b9a4da49d1478824d244d9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE3Y71300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa574b9077320f306e22af9ff84e79f9cfb4ed588c387dd195ffa665a045326. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/SE3Y71300604.