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 0x7c1fa66c2da3809da414423d5cb96c1a22cf001a1a20991d933350f5efc93fe4. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa8f199f-9810-4ba4-bd99-b3abe86344dd.json and https://artists.proofprofile.net/proofs/artist/fa8f199f-9810-4ba4-bd99-b3abe86344dd.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 0x7f92e6afc0d9c5385b95c5ad919d968bbdeabd6a75a4bac12aa376c381cb9ba1. 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/QMYQ51101403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7bb35d4a09d498db4853da016dc1c2902de024a26cb9c5749a0256b61303cd. 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/QMYQ51101404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceaaadb15688130bc21b23f43160619bfc06ec711114058ec7dc6d02aa6896b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:54:49Z), 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/QMYQ51101405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a379fbbbc185b940160bdc902bda8e9394877457348915931abb862ab7ffa. 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/QMYQ51101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a4d84b365d9f7d235acad06b81e5f4dfa451675ddfecd8ba419ba612392e45. 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/QMYQ51101408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cfb0ad6b35161f7c82c658fc1ad4cf1a6bad22e9d356236b8227c129daf6d6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMYQ51101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4b86a796f014176083e5787778dbd4c5c6a7f61157ca095efa8016dbb3e62. 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/QMYQ51101411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa77567e1b5f79e248e3d54cda0a09bd8a5ccf823eccb7728703864709777dab. 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/QMYQ51101412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bf0e48fa6c94fe213d34f7904294bbd9c7fce44c8e19cd41fa95e397f1a1c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMYQ51101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78cae4099c4ae123b2a9171d40a4c8687dbee6629a5c0e582d6e5be4170d5d. 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/QMYQ51101419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2498389cefadfb51eb122c3db38283f0d19253dbc7278f2e907ecc5f1de86a3. 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/QMYQ51104027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2086a03ef4106b2bdb81c6578670e68f8d09d282bb765684ddacb1ff8cc3f0e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:17:22Z), 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/QMYQ51104029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59ca7d2ae1bb5394bba2f479d23f259244377abb1df24c7160cdeab81bf896b. 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/QMYQ51104030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13fd343512bd546bd7508919891c27700370979bb23e1664604c8def42686b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMYQ51104031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32adcb945e38de5bb21609ddad8cd82f443e9dde43325ca21ca8cb249a2f299b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMYQ51104039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c922a4618cd7a503975c5bf9110edaffbe3c600dee325512bcc217cc8a99ff6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMYQ51104041.