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 0x92df649f18637a3f76068a48ba522c688ee0c8b9064d55a7d2ee48a9f5a38657. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31ce6442-13b0-424c-b78f-2b1e5b5096fe.json and https://artists.proofprofile.net/proofs/artist/31ce6442-13b0-424c-b78f-2b1e5b5096fe.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 0x4fd0209df6df9e7f12bcf6a1669f51b34ddce34b8a407b91608396422c6b1bca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2241483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d0bd8b1f3180d27a356063aafc1f1749b9f0e7cde9b538d69c53b402be5ac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2241485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a356663dbb5758e045219e4b6d54831686064f02816466f66777177dda77ad9. 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/USANG2241478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff278919f5edc8f05221d5fc68e932b712066e10c5083c60be6ef87cdeea04. 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/USANG2241490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7542389a8caa775622fd05f8ce78c876cba93a674dca7e41595993c7f8e1a97. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2243703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47118c0a1b2c2832f1253dadbd53c3c7a810d7f5f570ec93dfc249f88702cda0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2243713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9405e555a57187eabfd56bbb6e7491a4cbd9f467348c137ea7da1e9921fff. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USANG2243721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4067b4d708a3ed1b481ef0c1cf8be3068f4fb5b075e5adb8e684c736184abfe. 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/USANG2243780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225962ef669e5940fa1bfcb53d6a184cdbbf9625d4f3a54004242a3eb739fd05. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2243789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd0209df6df9e7f12bcf6a1669f51b34ddce34b8a407b91608396422c6b1bca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2241483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae04ec4b5c3666398c077be71374bb05e070da5ffa2a7aefacf22b2ecfaba4b. 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/USANG2241495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827d1a918e67a3c6090ec694afbf93951b1edc9aad109455dbd6ab95db851661. 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/USANG2241481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d0bd8b1f3180d27a356063aafc1f1749b9f0e7cde9b538d69c53b402be5ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2241485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f57c5fd7bb51aa6f46a638d012b24199452fee908ef728e20282141f4f95a45. 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/USANG2243704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a356663dbb5758e045219e4b6d54831686064f02816466f66777177dda77ad9. 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/USANG2241478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff278919f5edc8f05221d5fc68e932b712066e10c5083c60be6ef87cdeea04. 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/USANG2241490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d129f0a451606d6c7328b6f7fbc473ac44af08c8443c99a3770d997433187. 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/USANG2243705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7542389a8caa775622fd05f8ce78c876cba93a674dca7e41595993c7f8e1a97. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2243703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9405e555a57187eabfd56bbb6e7491a4cbd9f467348c137ea7da1e9921fff. 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/USANG2243721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c389d280f6e4f2bc4a41f6a0a446494efc366ca4ec19aedfcbd3a4803fd59b. 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/USANG2243722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ef0d9b0e6c8bcb7f4badbe6200487eb4bb44a6ca633e9652584696108c06a. 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/USANG2243757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367d2f57f0e491c26171a7f513c5da777366cae85fe83b94e17a4520fae669a. 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/USANG2243723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4067b4d708a3ed1b481ef0c1cf8be3068f4fb5b075e5adb8e684c736184abfe. 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/USANG2243780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225962ef669e5940fa1bfcb53d6a184cdbbf9625d4f3a54004242a3eb739fd05. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2243789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83583f0a428102485709a8fb935d3ad074fb51995186c2f95fe5eb137bda127. 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/USANG2243798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa174028d3287b8f4dc1a6888eeec87efe23545f0d141e59e419c4db3d20181. 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/USANG2250611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe15a61d90fb46710bd6b377a4f644a8cd8060de4ed233b701182dd729c64c1e. 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/USANG2263335.
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