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 0x85d905b541f03b6a0cfeacdccf7279fa27779881fcba0500ef50e6f32e585644. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49242764-69f1-490f-908d-c38abb063819.json and https://artists.proofprofile.net/proofs/artist/49242764-69f1-490f-908d-c38abb063819.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 0x65fcd9ad59d8c624bc1eddd315a2de07edc17e2736a2b053f054687138cdd986. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ESA012594102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d85effe91f0beb40efc7eebe0aec5a9fd9427e2b012244fbb4ffd6614630798. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA012594103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dfdf878d506ff40c960586953e976ab994d1dc9988c26d6c9f0180f3223e6f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:17Z), 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/ESA012594104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209bae73f55fceb592ecbe85b1700264d7e3117c63d018eb653c4d624cea7dfe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ESA012594105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe0b4582678c413fd9acd246564c22d876e01fa448de6c0d593eec1b6026aa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA012594106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa6765fe9d7a926d34543fa88421b32b1ea3fab720d4cb30be5b8d93ab4fc0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ESA012594107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f386e0e68a14c43591e8e9053ad8ebd9ecec1526423b4d6abcf1fa4eba3f78. 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/ESA012594108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1bece5046553f99e37754dcf8bb2a42a9e21b108950f63b175165feb4da45. 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/ESA012594242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72a5799b7839874c6cb4ac210b5daec19fe5f449e7e261ead53fd99da20696. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA012594243.