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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b4bc537aefa5b59c7706f1dfc8772de77a06a2581d7e122d0af0e7e383dc6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9904c5c-0f63-406d-9959-4d1bc5dd15e1.json and https://artists.proofprofile.net/proofs/artist/e9904c5c-0f63-406d-9959-4d1bc5dd15e1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2c73d3764beaa0040d7b5dba76dc56724d27f4598f62c2541edaead3466e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51235f39ca05c7370a330599796146a96daa46a3813b6a251df627770e9fb1f0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEPI82402599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777baad029f43bdbec483a3e28dbbccae055bffdfb106b8c6e1ad43ff6c65c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI82402794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6ce6fa4438e0f0b4e27664e4fd5335c4b57d617193ab990e37984baa45c1f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEPI82402600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2858c9e4940a5279d61c7e8baee9c27f8e05787d644bd6a5819d651770a311e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82402612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b682bfe0ffb2c471e9b5109da9eb8e6ada6fbd0342e58cf93794d80c33472. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82402795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954399fc3cb8b2756742423bd410a491678dbf8ae2aa985b2bf51a2d1b69340. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN62420550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2c73d3764beaa0040d7b5dba76dc56724d27f4598f62c2541edaead3466e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3eb97b2a2df0ce908e641de0e1efe4dedf0e6692841344880806ae16bb9370. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX2479933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c38225d0dd25b700bc45efee8577564adf11193fa9943e52a7cee13c48b21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2349964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5af5f03476b1bb385f94bbb1c45b9c98d88d3cbeebe7773235c04c5b53a126. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82323382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da9e27a21010d55c62fc2187209e27951afd789dd2747967442bc155cac4bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLR2329116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4723a9c9f32ed247890229d6658477c6df657c9f1183577a4872cbd0c5717918. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN32364740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947503b3c636d43227e0c0121aa2a822eed761fc0049e4855127650e5d496c3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K2301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e239cfc8a5701f78f98a82fc49646ede0917f901290dff44bd12ef80fd6dac. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMHN2364035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70651f2537be8eedf4ac900b349791840e4924b34757231728eec00f0bf0c6ca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZS642324742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f5697cc9687586f288b6ccf64192d39180f8d4d62c8ba1f541cb3196a7298b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMHM2326575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35651e50c6be7894e9b98797e05e7e7a3b651171ad4706f7f50294bee16a0909. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS642341915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1101e67ff0103a195b067cd70336f4a4408334c8c34145b4cbd8e121d39ae29. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZMHK2386129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f62efadf8f07492399d383d9862f1b6ea0017f66736908579196306d74797. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMHL2332229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf493bda2e9124e789ba9acf99e281f69a292098f75d890278ed1075ecc21a4bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMHM2367743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99a30d0f96f1688330d139bd57c60d4dcb28f233a18bf17f64f75429a11d680. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHK2367048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c91e252e640bac0225295ce740ab9d5a176a1ee48f1b56d037df175ea8d7f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZS632388053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a91d6e7318ce43f099985d4483429cf48fe2c5d60f28cdea5833681a9fa1e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2349965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532d4c48744fd1933f4e9a9b05780dd63ced09c8b782dcfc49d3754b9c1eb163. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202565978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad83445bea022d0e9460177a6e0a4eb84db11f53d6e55c174534396bc9bed56. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYZ2522688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf2d98ac38a974306bf17ffd059d3cde3c04747d767bc0fa67d008a68d57630. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAJC2438631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc27b66a7d55f6787b7339aefb1e033363d19e85e02e41eaf48ed499710363a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJQ2508754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aa3caac574aff1fed3c238ac25f12542b7b3588d64ede5c9c8c326efae22b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEH742523102.