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 0xd4bfb4491c26b1a1dfaf0daba7c89863ae8b92b69186525062d29ab21d8a0608. 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/05b0c0b1-d9e6-4f16-9e02-d077d3e9f6bd.json and https://artists.proofprofile.net/proofs/artist/05b0c0b1-d9e6-4f16-9e02-d077d3e9f6bd.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 0x234969d0a24129eb557a291f6d1bbb5eb5a939ed517df23d646997e2d8ab0414. 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/QMGMW1500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33652a68ca889a50a485d17c91e8615e97c33326e9d3c7e105a0840079e0c8e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:15Z), 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/USD8D1962006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3712a66e9276a1380077d80aea58a77f8288b383976b7a81f6a0b469dad9c4. 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/USD8D1962001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53010d8164533d1a3bdbcfae2cd5bb83e3b330af3e2bfc2a03b74caef346b08. 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/USD8D1962002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aabf010dabf45962036f81b6682ba98b796a9c375dc7f0bddea5efc70ff4d45. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USD8D1962003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938d33f1441bf9dfbf1e96827146c04b3037d0b225c6a5325cd5b29c75d0af3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USD8D1962004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b2fc2c7c9cc2a8583216b3e7901bd46d0e60876c6bf00aa93ff9fb47f283b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USD8D1962005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f96150e57692dca806572a84731514ff81fbee335f792e4534ffe7b66b0fc. 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/USD8D1962007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08723c6eebc408320f30f2f834d9d775e2e59b5fab63947a065f668c774a650d. 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/USD8D1962008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5936dd1218bd67f05720c13e73a26502b464d6f97808f7e3b1adc11af67542. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USD8D1962009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc331a5c57be8a7ca8b6d64a9a0aa526f077f4b36428f54bf0d56b60be0b7d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USD8D1962010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd93d635b8d6a8b4cae3181319039c7a2680fd9eb0e56f9220266d4592320ad. 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/USD8D1962011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0167707053d4d8ae0ebf8ad964536479d5f73fff45d036fde3883cea957d85fd. 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/USD8D1962012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe5540e0c6499ba2f7f4e300fd91747507b6024c3a9c367b833ca11bd0cfb3. 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/USD8D1969001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a4ee694bdaee1597cc7994fb6aa2ef1f7b6681b2bbe174b7a4c256efb93f7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USD8D1969003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599e8a50cb7fb76813ff7b5693c83af90ebfad4bcc3fa51c89fdef6cc54c5d3. 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/USD8D1969006.