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 0x49384d49ce41e7d6ab5ed95bf4d8a6d0276ecd677aa5d8d7ef57fa6959e2d100. 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/dad3504b-2dc9-4807-b054-55bb5319cde1.json and https://artists.proofprofile.net/proofs/artist/dad3504b-2dc9-4807-b054-55bb5319cde1.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 0xc9819292b568e9f5429c40fa27bc7bdb1fc40112418b22024c88b6eed03e4af9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJZ2216778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b6751350da22f0ba94b89d185e2ca3115bd7e7397da9bea008ebac4358721. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZTPX2230015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa286395dedc11407f6eac0914d0418858a38d117935d3014fb557874fc4e0af5. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CA5KR2368996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9614d8ebd97ac51f1e68d062266c36036de60d2d3c6937433287ccaea75c0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:37:08Z), 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/CA5KR2369041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8d85e0fb7007fcad85fe8d9dcd3e953caa0cf089d4883039d32c2ee52aabd8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2380282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc4f9f5756c40f690da25e14a77bb199bd072e1a0fe9a69f584c49a0491e229. 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/QZNJV2408617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f29847187ce45cc04282b095571679e1a2165c0183827a02286fc5e1b995a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA5KR2452929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f23b44dfeaec8baa2ddb450750e5ded680b2f2d262cc2ab2b1cbfe74c4b4dee. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZNJY2433192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e98314ccc0061dcc1b2fe0dddb434710677f2833082e6b36639c42105adb76f. 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/QZW9L2499729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86beb4abab139a946cce8c873df06772f8636b35a3be2c74e007e8f64d0d463e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:45Z), 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/QZNJV2577934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf9b49f16523e0e571241a92f65eced770a03a8243fadba69d56cac8a6a0bc. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNJW2530354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133ffb57514dee8a14b5ccd37187b5a0c238201a6a21200c8610b77d12ff016a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNJX2528133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7442b80bd589dc91c56b836e15430b9caee6ac6a4f59e1b4999731aaba67f61. 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/QZTVM2565480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be6b6fa81350a94906242a60b1a6d660d565627911f2426bfbd155ca9f41dd. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZTVM2565203.