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 0x666ee1e482f52ffe2690f0c14965ebe75f9344a215be907e8bd60ec7bf1ae80a. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dca1e99-53ba-4c17-b847-303b53d8713b.json and https://artists.proofprofile.net/proofs/artist/9dca1e99-53ba-4c17-b847-303b53d8713b.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 0xef726509d01db20e8fd93e883bedf899869571a4c3cec4a50e30bff1e43a5782. 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/QZFZ72464745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6174a9154e1308a5c731042b4b4adc40f137020eef1795151eee049018c43. 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/QZRP52439714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a40e6e9ace4d34ac65bbd4e20fa9936d5164b7927468f708058fdd0ba2873. 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/QZNWX2432860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf3f4d8dcacc88f6673a98d746caadbbb34004f272be84a59aba90b0a11dd21. 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/QZNWX2432866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4ffae2db9c5ee77b1d273fe2411265a769967bcb36b7ae108555112942099. 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/QZES62362732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a662563aef944fa0ab335587b261bcba3d3a255e9ffb758d0a9cb2ca7b8f91. 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/QZHN92419613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c274606484970a5bf2eef25581772dfbc37b7c5a15fa430e76f303a459aafdf. 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/QZFYY2304261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2011c5fe3fad95c6d807a190491d5c24886c837eca7db5766d277e7f083c1ca. 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/QZES72309140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e816d750e2c50c453120f93d2c1d503bca09114c426a8c9276f6a3e29fb83. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES72309141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe70a7d3b4c2c2457dfef4cfe4d5a6cd757b64d08f6bae27811e509fd79a721d. 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/QZES72309142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c274606484970a5bf2eef25581772dfbc37b7c5a15fa430e76f303a459aafdf. 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/QZFYY2304261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb79d097d3d18a254e4a47394ece56c3a0b67df552239cf11f88ffc800f93c8. 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/QZTAY2209278.