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 0x1122d4d00fc766ab9cdd7a38585180eb8907be825ddfccedd4cb7978b1185d0f. 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/864639e8-0ee8-4a68-87fa-49c4976f3618.json and https://artists.proofprofile.net/proofs/artist/864639e8-0ee8-4a68-87fa-49c4976f3618.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 0xa204331f76e1819afa4073b503c697b5a953a403a582bcdb17abcd5395e264c6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/IDA882022290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd6c1694feb22e88bffaf57574c4c046805123e11f1175d94865878b6e9fb3. 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/IDA882022291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8893060aa2d85c8ab0840a0fa962772f7cc641cfcb76a808a3d594c70377c2c5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDA882022292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf760a317efa7c88924bae21149736ea051fefdcc785fbe2cc086e84ea96e30d1. 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/IDA882022299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe76f6c699cbf75d6a66074db06a2b561b50b3cd05f80caa19e7cb2b4a32e8f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/IDA882022310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b4ea70fda89ac607f477e3ffa0f138c2e8506ab5f4bc43efcd48945ab9bfec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IDA401300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c083dc876ad5bb80674ff461ef3cde382f7bb19d296943a313d59e53f469ca. 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/IDA401300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a97584acc84303fe79fb8a4a8c2361c64ce177a5fcc9dfae7334812674d701. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/IDA401300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2906a3942fef873fbb638d60fbd3f4e32f4e91fc4c3b143d976eff26cde8a3. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/IDA401300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0388c40e062d64178bc3446ce7b4e83e174ad591f31138818635d098171e189b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:57:46Z), 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/IDA401300720.