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 0x9b9973c8b6f6c39233c412416ecb5aedd919fcfb754fdb69ceb96677539b9a96. 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/8412fb86-4d67-4503-b648-7317bfc1d9ef.json and https://artists.proofprofile.net/proofs/artist/8412fb86-4d67-4503-b648-7317bfc1d9ef.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 0x4845dd9de59dda61a4ad7ad7aed62562415980cc7561777c06bd51fd845fb684. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BKJ872300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05838843e73c61156d314c13944ad7e8fb025514f409be82c83ffe9451cec004. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNJY2311132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfcf5a425faf7fa32e0f3c5835a9c14d1f0b24be287afc003a387210767d6d2. 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/BKJ872300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17587bd1161118e8d81dde412fdfb8df2bf3db888cbdf59e8ca0ee21fbee917. 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/BKJ872300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74112d2c89343a4d2f7006a724e8642404a3137187017bb8a086a1ee27c67e1b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BKJ872300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dfc820e43cf961f23f8c73106922e16e48efc8d0b254f51411e5436b163173. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKJ872300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1545952dac306bcc073d7ec08d65c4d363177ca7fa0bc5d9f4b2a18aeb9ae1. 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/BKJ872300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b393801e6a2091d81c7be470051b34db8dd53c6d2ed8c9c7306ea473661e3b9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BKJ872300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59da4e112eff7f8e71a211e67235ece2f35e0d2e2e5ea04b06ff4ca94f91ef. 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/BKJ872300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd9a288c906666978c56a6abcd817ddc3c6fa56168f8935963a0a8aee8b2c5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BKJ872300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e38d4b9decc8d31040de624832ca3c339860a5f9cc2738dd6a1f4dc1f326ad. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BKJ872300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa71f8080f3802e50b0c69a521a91aa099f16f44326f6440ebb1017eab1c28b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BKJ872300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d16e346bf12d504a33922e49a4f6faf4736581128dccfd71797256002f0a43. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:09Z), 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/BKJ872300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc76c14ff900373c76ab6aac20c7c79c672b4b026e8791451531bfee9954c72. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BKJ872300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb8aff6e08fd9a4f02ce0d802f33133600dc7ccaaee356cfdfbf8b09c56a6e7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/BKJ872300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e038869994f7991f0d70d3f8e7394d58352437258cac73165fd03a9d387681. 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/BKJ872400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aab443e2bfc6b6a4d545a913487c5085046bd509267c99ac25dfe3b44d0bd2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BKJ872400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44433ffa292948835b0ed52b0a759f8a742bbd1d00f0211cc52809a9d28eb01. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKJ872400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebc4a294e089245e9224498e2756ecbe668afb458a9667592afa96fcca9d1aa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:29Z), 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/BKJ872500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d423257f600cec86677d79c363389b308cd60d39657e07e18eedbf5f0aaa91. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BKJ872500006.