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 0x84402d82df6c28e9cf18c601b4e2be161565a08381271af0cb576856e2fcf9ce. 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/1d5b3921-1b45-4f39-8ed6-3d252f0d3bc5.json and https://artists.proofprofile.net/proofs/artist/1d5b3921-1b45-4f39-8ed6-3d252f0d3bc5.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 0x3917e9bd2f1c0138956bb8bfaafcc7fbdb5de2cbb39d51f0d92669afe24fddb8. 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/QZNMY2402589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af628765ffca79d98e393dbe725f892b672061771f3812281cd42abeaa9ae1a. 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/QZNMW2454816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9901d355f0f90ad80f7b111dc778bb32141c0011b72281e8c6e1f9c13c23d3f5. 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/QZNMW2454818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affebbfc1d74a8566d993b71b49473093f526ff8724090de218e38049a68d85. 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/QZNMW2435708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974400a53ebbb252650520fa193eaa86d8f35fd49712fb668b4d78d9248a0985. 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/QZNMW2492082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfde77ab07a290a15bafa1e5ff85c918db51be47d9fa06311b2af5c8a40b70c. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:25Z), 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/QZNMW2492084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e53cfad87b690b804a04b4dd6c43156a1a958ec4b11d6887960c5ea2e46e30. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:42Z), 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/QZNMY2404820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe7ac54e621f726ddcc6ad712bff387bb9b15da0ee26d2f8edc7aa3558e387c. 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/QZNMY2437139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674ed9aa354a3d50988d9808a8b040716bffdf175498efdcdd92e115fd200eef. 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/QZNMW2474606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c00bee641ad0a5aa07da7b81dcfe89279fd8609e21f565f4b3efd4aa32e03d. 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/QZNMX2462466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf787a48d4e9e2d161b87c88fcc343319da94e6dcb8631d82a8ed10b9f0b36. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNMZ2459637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856afe950911080e336a00ac8d49cf95d8fde3e553d50e446c8d00d0c393d15c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:20Z), 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/QZMWW2537281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c9fd0841c55ea223a82c30dc3c119ac5d8cc190296cd95565b13a9d742817. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMWW2537282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a050722b50b9da76d48aa167a38a8a408a3cfb1496438908fa34958f1552aff. 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/QZMWW2537283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd1a0f75edcbbf958f93553773eb4073573661299bfb091233ced0b48db20e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:49Z), 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/QZMWW2537284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b454c0a7ccafbf6aa680247c6ac6dbb1d5e83ebc72d2ce3e1f75849ac279d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZNB82521800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede3ae5ae2fdc5447912557027e7dd0c7cb7560172cb0c17f366bedd3321b77. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:16Z), 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/QZNB82521801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f46fae17b2a892edd797b736a789f1e8ecfd9dc71f463c218e7c2a0e05e21e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNB82521802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeff2bb0bec2244d7b62446c5617c6e1f75625621a2177d637640aafd7ab8648. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNB82521803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6bb4b0b88454e14eee2dab26c5036486fbea6e4c777e486aef426bc00416b2. 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/QZNB82516253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11f3b969c20ba8d3a236c0b52d72a95556ec7df35f2c619a5e03db9c86b1ab9. 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/QZNB82516254.