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 0xa7c8e8500bda201c917eb330de0f84b0c266a82ee9986c7de131dc7da2f24f57. 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/dd3bf3bf-fbf6-476a-8c65-4b248d87998f.json and https://artists.proofprofile.net/proofs/artist/dd3bf3bf-fbf6-476a-8c65-4b248d87998f.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 0xbce2d95f887d681ba401cd0fe48c7c36f27611b2f2d7fbbb0798222ae5db843a. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USCGH1405256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb295a34ad2bbb428defb817cb14e67f9aace3315146ebe3265749027d78fdd88. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH1405257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf2a297da70c8a12546efdbd1db7eb3e746f5d8f3e5560c126358e4c30529dd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGH1405258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0022ab30e28c8ab7dc8fa11a38dfe75f02d26e38c740c17a6af2b62c77b96f21. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1405259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce54cc0839f932f6bf7d387f0ab5c76bd69fa01714ee45964fdae954af28cbb. 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/USCGH1405262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9572c09248646a56b961cdad9a84b3acb19033fe6298b10f5f70074fa75f21d5. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/ITO371603168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faada43c88c9ce117a03ea6a7cfe1b32df93d92302b26e1cbce4972d5595fcb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ITO371603171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0204e985d5abf14ed83c35e211258f3204ff4553b91da769d17bd07f44c6c782. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:03Z), 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/ITO371603172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd83dea14b664e677d57e5fba0cd101443392bfa76f2f3ea90a136d23d2ef2a3. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:24:22Z), 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/SMRUS0051522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbccfe99c43c45312429e06fc1ca75952edfdd2b5c63bb52de744f69a5b11e00. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SMRUS0051523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b28eef59d4095bd7a90308f33d0e9559a1f98c5be26892ff12ff279571f5b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SMRUS0051527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664b474e73e7fee7173d8eddb895fa138c2ec857ff2c8c84f34117262acab91e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:28Z), 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/TRAZA1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e712ca68d47b532aee2b8dc92511c08beb0c2c8a9661262b7c072c8385ecc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH2170147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c4f4b983f2c1f1e1832ebf939ccf81dd1a9d8482f5a4d7b778b2a8cf4fc1f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USCGH2170149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beda9ce209f63f83ca418b7b796d24424245e3de3f7e55bae9f26052340a3f5. 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/USCGH2170151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c844fdd0561a44440890c59354f87c538775c61b043bca8f39865967abb6f1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:53Z), 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/USDY42473715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df08ea75862ba0c12121befef1578c63b56e4f7632201f7a3825460ce36280. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDY42473717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd623aadee3e0d71b0ffd53d264d37544c3406e047fb35aca5416e70c6f3ff. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:35Z), 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/USDY42473718.