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 0x81573e4e30062fe179dca55e44649fbbd52f136dbac6974e6fe5df674d85078f. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f55c8c18-1195-4dfc-9929-cbd31b46f8c7.json and https://artists.proofprofile.net/proofs/artist/f55c8c18-1195-4dfc-9929-cbd31b46f8c7.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 0x17ecadfd608b0235db757121d17407fab8e8599ef969387b128e5f369f2d4ebe. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:30:55Z), 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/CBC1X2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08786f3900d12bc3e72c19f62326712685050e498767efe0d7dd7790c2351a73. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CBC1X2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887c67e032cad4756232a39c016f36c5cda295ac6eac9f996a71d35dd7b9b480. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:46Z), 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/CBC1X2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a1709bfbf5f71572c2fc3515f048a069b4572496b0902a2e3dd5cc467e5aaa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM42K2314997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558878ba591c2d813330351855a9d3e542569dd9f3cad772f97324c939c88a45. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZMHN2388185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f42b8d663493af2788977c7b649281f1e9150ee8f62b365d1db17a4e83d6b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:00:37Z), 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/QM42K2360838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea377eeb00559a9f2cd34161b35e06978c9ccfd855c6bb4ae9ced200f5c0ea56. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:45Z), 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/QZS652311049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fadecf85a6abe57c492d2c641f631b7d9464416683f2a3656beab2ebed3410. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS642395054.