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 0x30cbb0a05084fc4864ce5ef7e0660790b7656447c23aed7bea4c44b7aeb94a9d. 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/ea8dc475-6954-4a3d-be26-c5e47db9c941.json and https://artists.proofprofile.net/proofs/artist/ea8dc475-6954-4a3d-be26-c5e47db9c941.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 0x0264909f45e686be34c0cfb7cfe9ed08c4f125a31117b07bf6c437aa1eeac381. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ1616828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee9ca5ace5e90d2cfa7a2fbd7a3dea8151e8e6f1af9f9e3b51c2481cf4b1cbe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USCGJ1616829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9478d6ad4554cef74ec7d1ee48d1eee3b889e1e7c1a8e2bb167a90ca87bc3d62. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ1616831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe922aada4b3378a5a1d2d52f80aa2c9e20f6e11ab9f07c082efecc9cc88f7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGJ1616857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0813fbe9506b53ac77f02deff317805fb284d92af1cd59d891272d9dd70a20e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:30:38Z), 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/USCGJ1616858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df7f92e2566cc431241c08743c720a1be87c69cce80b99ca4bfd073249b9a3. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USCGJ1616859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddcaca444d007516278b6295ac4e8de9f320d34867521a07c8e26ade0387e5c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ1616860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd159c9b081f433163b33d0dd22188f81cd3d1b3b87dcc8c130f311c79931386. 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/USCGJ1616863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb43e54fa344058602e8c256d79f62f07c63cc6d6f80ff85e4a28e6c08699816. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81672706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffadb33e453f365c21a2ca1a10a67f72589dd9dbe9feecea8efe2c13f800b1f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81672714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335832df561b5d3ffc673db75a3e2fdf04dea03ddd72d9bfaa5e80ab93c47bb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGJ2382117.