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 0xa737c588b9a41c3099c8b5a6d9b9b01ca55166f2df28e44b8abb650180de3686. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d18a91d-fa31-4220-bb7d-1089f2c45ebc.json and https://artists.proofprofile.net/proofs/artist/5d18a91d-fa31-4220-bb7d-1089f2c45ebc.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 0x8c6f49e5b7533f82e1a5f6ca2903bc553d771358f2db5b71dd6d3ca46e7e41bb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2342972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e170f7d3f3d80dced4375e2ccb9607c4827f45871a59ff876a151cfedaea5c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72446144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8766bcf45c79f73d0cdd7c0c39a9a622f562187cb76f5fc78069f565da1c5efe. 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/QZK6F2431958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56855691041f914daae500fa4802999f4c2a30307d4b203632314ed2a48b51aa. 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/QZNWZ2499093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c9b2c2e8edd6d0a28a430a98ea22e9e62258095492018baecdf0cf6f20c686. 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/QZNWZ2499095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b190dfc2a5104548c394f6a700b3c10658f524ec7606be0610d0138d9c3b65. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTBB2416788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ecf1db6ab373cba4601f902d0d79adde54db8841ce85d8e4406215756c601f. 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/QZK6G2514283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae579a087ef744f10364cfaa7109a8826ca7d403569d58de530fdc5fa6b618. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFG2511566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16edc06ae5116f837ab12af884dafd2a3d697cacaee1e15d3050f5b78ca6fbc4. 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/QZWFH2593307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae579a087ef744f10364cfaa7109a8826ca7d403569d58de530fdc5fa6b618. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFG2511566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d3d2a11ddc3ca94a58e1403f472e57940230fb9b5a71b1d71eec12b2990eee. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFH2593308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc925ea07ee680abe8608b41457af63b6cdd899acf96bd845b2782cb6b2d4fe. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZWFH2593309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb42cee2a3a653251568025fe00ed51ec7037d505f6a6133372da95c566e887. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFH2593310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7c9f8ea98ea77f88aa4d60bad4a676aacda291123b0f7aa150868e7b6c72d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFH2593311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6153aa93a5ce9a0080c7598b98af03d464f4f6b77d56f313ce48a379f7829b0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:25Z), 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/QZWFH2593312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eadd424a8feee8691279d8b93cb466709a67c0fca096ff1ed371ccfd73817a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFH2593313.