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 0xf086398d099c7a4cecb54d02e96ec6da314ad65d76f3ab742ef153b5078f3fc1. Chain 2 (Bitcoin): anchored in block 954048 (2026-06-17T05:00:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42035168-416c-421c-9205-bdd4f9cb86d8.json and https://artists.proofprofile.net/proofs/artist/42035168-416c-421c-9205-bdd4f9cb86d8.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 0x633e93de0054f62b1a6297a0e995886f051279aaf5cfc95b9e5439f2a010db77. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:34Z), 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/GXHAF2562577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11489e837ac392d566273d165a6e437ddb635ac57ede63d662e7f936db18c1b4. 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/GXHAF2562591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36897e92381d1fd2a7d905ed3c5d0b27c844b04ebd5d97cc4d91c12935be005. 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/GXHG92500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad0f31d879d93147987c1605c1c59363b8efb5f8114d09dfdbc0a0c72a9e2aa. 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/GXHG92500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddf1c257a41308014a6fa26a951913ec4ff1397a047ee1939a91249d4dc2938. 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/GXHG92500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ed4a2c955a703ef7f6fc8d2088bd499d16d785638aa1c878c2d73c59fda737. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXHG92500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08040f73f0d908f9df09290693a999875c31bc329f722567dde71701f280fbba. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GXHG92500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbbcfd6769d7d39bfbdc0a83a6610fde904f713a4a53328ffea7076c1a94196. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXHG92500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769abc27f3483673d97b08784f54a35c69f255d8e11af2195d051b05eeb72e6d. 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/GXHG92500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54778e70019e35d119a7eb9b08d44d16ba34aaec51ad2c104ed3caad98b904fb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXHG92500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ed7cb79b735c37b6d71f311dfe2667e819e013ac7d4ccdc0d6cbdf0656bd28. 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/GXHG92500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffbbb9e77df187d5724e360e5d59405929c5143747ddbe21c9061e44f00d0f9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GXHG92500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d68c35fde88bd1528bb9236d03affd7c904101043652288524af497422fd21. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXHG92570044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d8400ff0dd64a2160b2692e566d61333dd759d3633de650d374cdf91ec97a. 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/GXHG92570045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc885d5be13e363adc1dbc465ab088dfd3af84e57f450131c5e1700dd56753c97. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:37Z), 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/GXHG92570046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd889ebca87f1f2544558aacef3fed1688d8ec5919a16e2ff2b2680eb55b917a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXHG92570050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf850579ed523e8361806495540cc230b7377a3e67aead0d81dd82172a657f7f3. 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/GXHG92570051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ef986cf0ec3fdd809b4ad93746d0507cac01ab554a3a156a29c8fdf5c974cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXHG92570053.