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 0x6bd66bc1e772ae5f21853e6bf07f2fa0ea74e2d490b703b62a9bdf1d0b4579eb. 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/d94c0d85-b127-46e5-a028-5977c1d815e6.json and https://artists.proofprofile.net/proofs/artist/d94c0d85-b127-46e5-a028-5977c1d815e6.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 0x312f4d9a2d135aaca0c7db8ab5faaf6e9814ae39539214097ddddda7f89ef792. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM8DG2097566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe254f9a1e335e9fe98ae81e8ef22f2b392e65ca16eef5ea9455761f4edb5ef8b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZF8N2001825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e86450fb2a2be10d00cbbf566ea14e4cb686e4e6c7d9f20e5e9b6bac9fd72b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:58:53Z), 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/GBKQU2118836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8cd01aad6091fdc1c44febe7f7ee08ba6a9d01559582c0e10bb51c136759d9. 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/QZMHK2008418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa874162551c5a0f4344412c80102d9b7e4218377f7277e932d3a994f2ad249dc. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMFME2159109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde66633fbc5cce16cc15b9d9028d8b4d8de6aa5d10768f7d49c74276eb1f8a. 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/QZMHL2318083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f2f471f171fd10b536357119199d7c7ab6895e10d5f499e316afaa6a2b54c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS632320624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87601d27af1ab483f0ebf83694081b5ee222a87eeaad3ac3d7ef6c88833f89f9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DGA092308987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa05a20eb5410e8c02ddac99d60335fa3100bd27bd5236c3ac26296a88d047e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:49:13Z), 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/CA5KR2453323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d995be787c4b621482dbffea93b5e55b9a64cb7742ad55de4fa83b6f6e116. 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/QZPEW2459504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3576b9f8a658778338aa65c5c19393cc6ad559180d25b106ee85acf058e13f3d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAIM2418130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec55a2677aaefb0f40e630a4e8f5e230de8616f5003deadf5005a342a0ab1ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA092475362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa890468a3a83c538714cb6a9e7f622628c19522297fed4078221cc9b63ce5c2a. 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/TCAJG2513184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7e4588c29aa2638d71218a064b8eab797ad7e1baf468a9e25cc4e32cdfac9b. 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/QZZ8A2576590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772feb4e89b4cd9c14c14465d4c933c275b1c0b69dafec1ba8f5541c7eeb20ee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ8A2576718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e2139e23648831e6f245e49a772717491a832519f1e692e688456b4fbeb51f. 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/QZZ8B2524228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7247eb473652aae022f277ef02882b800a04836a06e94139790f6f22878bb6. 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/TCAHG2311238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde66633fbc5cce16cc15b9d9028d8b4d8de6aa5d10768f7d49c74276eb1f8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHL2318083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f8fc88b65f5666429786b252032252babe8f9a160eb4334c818bba07bfab5. 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/ES71G2334138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d995be787c4b621482dbffea93b5e55b9a64cb7742ad55de4fa83b6f6e116. 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/QZPEW2459504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfea6448e8421e55134ebf6d50bb8c98db41a4decc7063d15b84d4660a29a07. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZKDK2032803.
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 0x4bf23ddf062055ec491d8753eaa83ec2cc5d8a9174b93424f663edf1f58570f2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5FN2475177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ce7afd02ca0083e39aad1dbefea160e8874507b3b434ce1725022d7f7222f6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZS632106704.