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 0x3e6f92d790c7f735007ba124af5be446c2a3fc996c78ac52fc067189a52829c6. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87bf9f40-1866-4572-ac6e-884adaf05125.json and https://artists.proofprofile.net/proofs/artist/87bf9f40-1866-4572-ac6e-884adaf05125.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 0xa477718d55162798b54b85e6525bcfbe99a3329097f61169072cdeda4a7b3991. 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/QZNWU2512320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265e6af50d1c4740a3e66e0e3c494f7586614a2650146cc11dec1a17fe954ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLS2560675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a14b9ea7d08ec278df3496bd831489eff0799323341ec072151d4144960847. 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/QZRP52578875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314099147b9da8fa918d4458bd53a21291f71cdfbdaf4f0040440eb6b035158c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62504648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e0600e4e9120996c57a407c0ef67dd5c534a1b541d3fbc86f9cbd503f3b9a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB92535844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf296eabafab89994f364cce20b6d3919f59748852e623ea3f4451d578cc58b08. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBB2562184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb7413692cc456ebd5e48561ad5d4280eea2abe6a7eb8ce9563c0d2d20a3a27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2563070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ec16f235598e452cf58697c36da4bb2dc55ad96894369e19109d3a16908db. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2565381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b3c38c3dd19f9dd7f0ab3079d83a0c83b74d85426b330e84c6ab0ef5c3469. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFF2501238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f0ec1ef85d32deabc15ffac9580e107a73dfda0a4287d5a85e0ef52b9c4b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFF2545235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc8d564c2712b79b670d10f924d3803c708f02c88541bb2f0e74d9eaff7adf2. 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/QZWFK2589858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49ba4f92b455d6f1dab1ccf6a4fd89b05ba312606b1fd52061766fadd89bfe. 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/QZWFL2580970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ebbe24d38bb7ebf57b499440c9906d2e117f4e6323127a637df010566413e. 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/QZWFW2514300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26c2fc3d051c9224ede5386e78a3a2e2dfe02eebef1ad5be5454c14dd7f1fda. 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/QZWFV2592540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a50744856958c17fb48b5392c24c0463885aaef29b0df409d16426c9a814e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFV2587058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf759ddd940b04fe14d2454b6f70a684464a240180707df81bf7427322eb1c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ772574617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d04101de4ae4f82444d6becda9e3a8bd06e734fa8d335a9c53cb1e99f578e0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ7N2513500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b1dea592f79c50918bbb2d7f4bcd06f89be3519f0b8802a163e36603630705. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZZ7N2592873.