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 0x91130b5bd9c5de5dcd0646877c6f322e37f0e2091c5dabd6fdeb16294d1e5ce7. 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/7bcd41f0-1571-467a-9b6a-f5049be678e0.json and https://artists.proofprofile.net/proofs/artist/7bcd41f0-1571-467a-9b6a-f5049be678e0.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 0x65270375f9d089ea753ad5fca55adc056ac84cf8290bb03d60b8ff47b8d69318. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:42Z), 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/QZAPG1700827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183879e6022860c24084c1b7997d881baf35bf74cf1b03d5cdce619009c35242. 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/QZAPG1700828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd50e0f86ac7acd9eaf425bdc95e5f67f64a7301d60cbe5060b00aaa2373fc33. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:39:27Z), 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/QZAPG1700829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5149fc2db50da6ada8b8ada23c5b0bdda493e575f9f504ef2c19ca4d50e1781. 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/QZAPG1700832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe1302dae441758c9ce3cf8f5ae6f4030e16e3ab6327ee3b5d019e768c5794e. 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/QZAPG1700833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f55faefba058d08d5a8582de71a6441e27241520ca2c24fb098f9130bdcb98. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZAPG1700834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234de6176c1f374b8813eaeb57d3140c8b19c4207b96cd8cba2dbe9b4eb6b89c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZAPG1700835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f3541dd59cf3cbe22ee5fbb3e30b1a220d156a94b895dec3c091365839f66b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:28:50Z), 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/QZAPG1700838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c7ac5d6145d36c4e55bbc29f5ace909a65a13e1b8787ef54a68bf0bf86eb3. 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/QZBRF1898803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3974f96b636bd32dc36897f6d2b8b185547d8d3a6148a2485e35cae01f9c5c70. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZBRF1898804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180836d59337a97120d9319080d9a5ecf02a1824bacca3b4cce32720a9d794e. 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/QZBRF1898814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7af6ec8f9049699616cd68fd53e7060f8c1937145a430858ecb24b6f551047. 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/QZANL1794896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93c74f839089da555f5afdc9cd592e7ce6fc45b4afde5ee12643aef95f6c56. 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/QZANL1794897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3891eb68697945eaac1595e79fae1b1513166275b6d97ee3ff4242d1b983cfbf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZANL1794898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d94dfa301b1958e5d9b198cb164b15940cc681e02f1143e58f05d88f89169b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZANL1794899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f344f7f1f3b84771e6cc3cf6a9b634ed0b6e245e31518e23d475be097d5bc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:41:53Z), 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/QZANL1794904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfcaa99df21ec91c90e7d2fe569409d66799695ec09ba628ccbbba213c5fb64. 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/UST8K1683579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda10aacf6f6bd9caac5b80225b17a8e1a4ea1db83a8aa94033efc08c7c27e0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UST8K1683580.