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 0x99dfe019bc68c2200a03456c5c2602a17f6a9420592c72fd027be0f91c3fd026. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcef50c2-df7a-4fcf-8634-3bfebb752746.json and https://artists.proofprofile.net/proofs/artist/fcef50c2-df7a-4fcf-8634-3bfebb752746.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 0x8a5dd3c1bad93b91f24c40e8213e9d1632ce2c27bec9f3df1c703774e23a1eb7. 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/QZTB72427941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3e58408308b851ab19f4f3581581b465642dee8a33fd124817c3745c258313. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB72427942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1e0b942e1e46bbd161a61a05ce2b3a59a0e1087b741ac6574d0b22fd024a0. 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/QZTB72427943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc787b79e41e697eb3d8f95339d8d3edfc3ffbf0677feffa7e0db79bb2867637. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:11:05Z), 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/QZTB72427944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da4f5494cf270f778f459063cb1b1e36feab16fbe1a9da400ab68d2eddadee7. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZTB72427945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4dc94600124b8df2511481c4058dd7aaa8bf915fe8a0711c128299e74595a. 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/QZTB72427946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb16d1ed22d839a399156271e199e90939a7c044db64577942ab6e3f75eab9d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:39Z), 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/QZTB72427947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe027548570f8c5043a417f36d7acf96eb98ae4b15272bf0408f614c235010f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:22Z), 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/QZTB72427948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85345df00e78260d07197237f7b33735da8058fb79a861245ec088920f2187f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:07Z), 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/QZTB72427949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe490829d58d6ea9052541a7a86f0eb4765a700c5a96615249b7860d1e1ea12. 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/QZTB72427950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817bd02526c080dfdfdd5de64184f44353dfc6f360af8cd2d616702743d9abc9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:04Z), 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/QZTB72427951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5dd3c1bad93b91f24c40e8213e9d1632ce2c27bec9f3df1c703774e23a1eb7. 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/QZTB72427941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3e58408308b851ab19f4f3581581b465642dee8a33fd124817c3745c258313. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB72427942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1e0b942e1e46bbd161a61a05ce2b3a59a0e1087b741ac6574d0b22fd024a0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:56Z), 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/QZTB72427943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc787b79e41e697eb3d8f95339d8d3edfc3ffbf0677feffa7e0db79bb2867637. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72427944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da4f5494cf270f778f459063cb1b1e36feab16fbe1a9da400ab68d2eddadee7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72427945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4dc94600124b8df2511481c4058dd7aaa8bf915fe8a0711c128299e74595a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB72427946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb16d1ed22d839a399156271e199e90939a7c044db64577942ab6e3f75eab9d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:39Z), 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/QZTB72427947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe027548570f8c5043a417f36d7acf96eb98ae4b15272bf0408f614c235010f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:08Z), 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/QZTB72427948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85345df00e78260d07197237f7b33735da8058fb79a861245ec088920f2187f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72427949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe490829d58d6ea9052541a7a86f0eb4765a700c5a96615249b7860d1e1ea12. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB72427950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817bd02526c080dfdfdd5de64184f44353dfc6f360af8cd2d616702743d9abc9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB72427951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f4bddc45ceb10fccd38bbfd60124091312561aa40ae375c91a206fc5307de8. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:27:59Z), 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/QZTB72427952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb4e253f07db1e1ec27d5becda81cf60678a1e4ddfddae1d6b67a93b22ab75d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBD2499156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d83ddf272da5f93ed6f6dace945946806c6e127f0e2cb981affc21a49ed73. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTBD2499161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb96c1ac7683a9895531803454a9eeaba30a3d80baec9dd8d0216025fb077108. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTBD2499164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c973e377793b426e10681b22bfe0cf84e817c6c67d39666f52262c4f71593f. 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/QZTBD2499165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111fc65ff5d60d70935728b200b48f0bb0aaaa450bf629896a7f3e51119093dd. 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/QZTBD2499166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8313d70ca5540883b187d959776682d184d78b87f2ec951a5c03a9a55fb323. 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/QZTBD2499167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce00405dc562e6df437b6d04a38eda8bbc7acc8c49bbbbfffc4ea16283708f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBD2499168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4554f1a8f84acc3dc9b1821085c64ff56d3fbecca59dbf5186918e2e734358df. 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/QZTBD2499171.