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 0x5c7c7efd313c22f2b0a52d97a96b56868333b122de0dcb3f74ad2feba6041b67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d509b7a2-10c7-4447-a600-8e027bd165cf.json and https://artists.proofprofile.net/proofs/artist/d509b7a2-10c7-4447-a600-8e027bd165cf.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 0x697b193554e539e3ff5e113a120536dc9c176f1666271cdedfd3572bb8856eb1. 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/USL4Q2116563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65821825edf3c35fc15ac0efe1997c2dcd12ad1226c47631b7d60534a6bb590. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4Q2116564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ebd21fc600f8db998054f334094487a54ae31e6a475986f829f2f5c9eb1b08. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:07Z), 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/USL4Q2116565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f9ff9e7257fc14f719cc08ef1ffae86941ee95de731b0ae930f775e2b635d4. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USL4Q2116569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1652fc877d1b9f4feea873daaae1e0bc75d676ef87f20431f7465dcc0c9c2a53. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USL4Q2116570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1922b9a72a341a0f420e91c50a7192f3929f50e6a48842623e7a1988e585a93. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USDY42269093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ef1e363ba44fcc74e51b7232b319e42dc66ea7e91fee1410ca7c0cdcfd507. 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/USDY42269094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50caeea922bfcb7b46ffab067408b13245eb41aa010522e84799bf9913cd4f9c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USDY42269095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2679f41d2cd922e9de9f10c088b46d325588706e1cdfcbf2aee4c558bae5733. 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/USDY42269096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db9e848bf9386ec9d0df97411725fb12028cb39991b2b39eef00885af43290d. 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/USDY42269097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c576e84dbe30a7bedb7a175f76ce082f7b38b310c850d584c5a810bf265f064. 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/USDY42269098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e4032b316e5aa0ccd3bcd97beb276c2207d9a8565b9ef31423462482b9bf0. 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/USDY42269099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3806785122377715d533bd1ffe9315b8e383ba786e4aeca925497415a7c95353. 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/USDY42269100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28e6b84507fd5228e0f39a4c94c5ec7d61d60f1579b533fe69daff5eab8dd6. 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/USDY42269101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba90d249c66e94cbe847c47b824abf28730a87e3e93b3d7a9e150e7981efbec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:28Z), 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/USDY42269102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd260d37c5a19c50865de2c13f43b3e49bfec08bd3010ba4ef2a9085365b8e39b. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USDY42269103.