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 0x087d793266fd77a1deb60e350f9048a7b9cf63ee37e25ad0b6e7c479c1f9b912. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/339058b2-b0c9-455f-a078-94269aa0c7c8.json and https://artists.proofprofile.net/proofs/artist/339058b2-b0c9-455f-a078-94269aa0c7c8.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 0x3e79b77cb7e215ae029d280d09ec11e68b270e658321e57f8f395a67e4ec9768. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USL4R2001289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901f7bbbee7465b5feb4ff9077e436de109ba24cc59128dfa125b605a783a966. 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/USL4R2001290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be967b939511004dc62c5cd7daebaa4493513cc4f67baefaf30933ea2857326. 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/USL4R2001291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b01aa77c2753370a67ec5902c91289d787a77d0f32e3d1bf63ad0b14db0f1. 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/USL4R2001292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5d7cf06e96bda1856561275328d4dc64a750cec5aee7888c4c4060f3ec56a. 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/USL4R2001296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e3fd7effc5c8a23dda615bd67341eadbb14f182cfdef8e103cf247317d125. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USL4R2001297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4f182b21bbf17515c45a31797b662fc10a9e8874425c193714f1f0371c1dcd. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USL4R2001298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501d724306a7e0a59034b9319aabffd4582468979f293401dcc2ae980c47139a. 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/USL4R2001300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff551beb372b981216f540a34ec15880e9559e34b0389ac37c0a29959ebbf7a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4R2001301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba317f5f85059202ada5ea64798c13bfa774161da4c5f1155647cab1076cf08. 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/USL4R2001308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1f94d17819cfdea180ec1b406631669b5856f1451e0c0ebaf44693f82372af. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:25Z), 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/USL4R2001309.