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 0x3db35905cc5cb6e4afe14ae426b75f985109b4f959f6caad237679bd329d5a68. 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/4d8e46d7-d89f-4fcc-bcb3-9b0a88e71627.json and https://artists.proofprofile.net/proofs/artist/4d8e46d7-d89f-4fcc-bcb3-9b0a88e71627.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 0x053c042053dc0102277ddbb49725a6ad20f95ad63966ba9d488c0b64af31c2e7. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEPI82446750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38405f8ad1363df64b0f75615324f9ceb8ca24dce7cde82234163deff55a6700. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82446744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503bc52656cc8647e0555080165734d4167cef553aa9913b10fbf6a79c34cc5b. 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/DEPI82446747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8efaf346d88d63ef1cd52dbe82798756acd843c010042aa15c0d4ad538e274d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEPI82446836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c7815f1594f2ee44e362194ce49a55818af4d1ba23ed4396929b9ffb0d6e2. 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/DEPI82446832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c199643d5e9e03566a94885aa4c5463296b3143c64af5ea1eee38ba18ed8b5d. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82446835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf057d1feb025d814e13fa9c82387d7827d245b0440b2ac78752f48a41e49d14f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82446845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc64025ddd78c098cd85c40dd9e18768bc65ce2995d0b4f4feb9e7beb1387e7e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:40Z), 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/DEPI82446846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f151eb4908623376d25496e1f90ca8fd225875ffc43f69e2ff3fe263856916. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DEPI82446916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd3250feddec53913822b90824e9d0afdce40541fc0725fe8750f18a62ebcf4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82446918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b15358e1c0cc969510ede99d89ac674e6090a4f8fe7b17b18b591add51760a. 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/DEPI82446907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258b001c4d3f7229b49b8f3d12d438c99ecd25f81daf2e0e87971c0e8e98ac28. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82446914.