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 0xdc4818d7c6d4b7cf3bf1ec02a189ff11ef697dd8a245165951f8156801c3b9be. 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/97d5a501-e275-48ea-80f1-2cf88fae804d.json and https://artists.proofprofile.net/proofs/artist/97d5a501-e275-48ea-80f1-2cf88fae804d.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 0xf98b5fc538fb9b86810d6b38ee1bf8fea542aed09e0b78b064ec9f69f795ec6d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USJ3V1042277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cdf4e3d39070e537c3dd17ac4f8ce679f3b2d1a9c8292ec7904aac01a51a1c. 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/USZBG1118885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436ce2c4810da319ed8985cad14baf5b9466465c7a5453c083192b5171cd73f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USZBG1118892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dacb9c745730c4f730502d5556198bb09528f15dee062d54af5387cc99d0a6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM6DC1511384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09d30338a11f4db117dbf7d7f9c208af6944018285a7d0e29bb8e927cc9cdf4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QM6DC1511387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68fa924c618daa6626e5797798456eae055fb82ee91f972988e7b10cfaef04. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6DC1511388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e95e9a9d84a664cd6c4c0c6d0991ea6dcc81f16de964009ffba6a8564d6546. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:06Z), 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/QM6DC1511394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44bc63272b5c6b56bd6d55dc495ef1ba3dc68adf3575281f54ce1e6ab1f1398. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM6DC1610994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99809f3345d0247df7d52fef03ca7bc49ef37f33d8183232949722f3d55f65. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM6DC1610997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecc7dde93e7459529215ebd8e8f7ec281aa9e7922b6ab2767967191ee202476. 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/QM6DC1611060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65c1dc2fd8b87a9e0059b67dc5d8dcd6ad449456d93f077e0f36e91cecf9a9b. 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/QM6DC1611065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7505aeaacf08e207336da05de35c083c7f4ee07abe5b90127a64c7156a83bca6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:44Z), 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/QM6DC1611066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eebf35f2fbd5895b717bffeebfccbc66405a96769fd44468be704981ef932b3. 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/QM6DC1611071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc469e01e36a708c09e218ff53e6cad4dba9a30505b6b86803dbe12991fc45492. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:43Z), 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/QM6DC1311404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4cdaf89619555a14fabd76d1717bfaf6928812e0f55a26d792b3fa603eda1c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6DC1311406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec8aaa3d5b59d2e939cb0b5c207cb6290c3246a6b74e73f996cf51731e07ea2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDQH2160153.