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 0x8d5935e0095f38cda883091db8493490e333bd49c71d5401b64dd6c3c605c028. 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/77867a91-8657-4bac-9d61-1527c61d45df.json and https://artists.proofprofile.net/proofs/artist/77867a91-8657-4bac-9d61-1527c61d45df.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 0x432365438aa8b7d0ee125abde2b18375bba9935215d2202adc7fdf2890a55000. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTBB2224779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd739e9819e72ac53f37b06b86a0fa2f2ff8cc8016dd0b003151701f303ebe470. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBB2253319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbfb84025cbf9ef4dbe218256c07857621e6245d0769fbefbd894e933c2842d. 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/QZFYZ2312440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3cdbe975ef00c0e425a714aedcfde30170f7e4dabb4972cb29863d0a2c6686. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:51:48Z), 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/QZFZ32345146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd713d10b3539bd9d7ee8348d3f35ac05ddb347b640eb8f2565995620ac30ea35. 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/QZFZ32385720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02c101b9e75e260315e93894e9664d5c2d73aab5236c9d9c7391e226f09e60d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFZ62394181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2a0fb55b88881936be695d6f55bf85ccf2a01516f180988fb6d0fcebad56e3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZES92325408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe832821227f777bfc677ac40905565e1a16a3b369fe0e55fff87deda526065ec. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN62398132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a21e989a3e41a3060c3b56cf6c9fdb437bc415fc84a1f2dfe44d7bdf0b874. 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/QZK6M2308333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64953badd4396539d62fd1ba7bf3fde55090ea2bc7418da3406efc00d5b23e45. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZK6Q2368972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0c607b6b382e4d5407553cf40fcbf9b3adb3ca90c0a6bf377249c117f99b0f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWS2369540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64953badd4396539d62fd1ba7bf3fde55090ea2bc7418da3406efc00d5b23e45. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6Q2368972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86ddf6b32beae5f7387656e11a27c8d3e57c7145f37c2f704d9c3c078ddf6ff. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAZ2361498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887331df6c202836af52e0efaa52e3940b31ff6da25ccabd94af457e22d63a40. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:37Z), 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/QZTAS2357599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf36cd0312e69b980e413d53dc906eebcbec6d2161491a86b137fb1748c30268. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTB52357294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac18ddb6916e9ed0ba21fef0406628373b7cf896135ab974bdf07f728889e2be. 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/QZTBD2323795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e35368c3a2da03a0bdf3fa991112cff3d27008544be96d377dfa2e212716df. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZWFK2365694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5886ebcec310c0e659324ad8551bf7e30685b5f9da1c881702ea93c1141a37. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFL2319883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba422843b39bdfc597a273be9f3285360781f7098bf1d1b9dd9a4668440e9917. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ32438724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b782b3f6eda6dd36d028a3349d7a43dfab6bc36d653ee462c27a1a468ed3d5d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ32468806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaa93dfa0027200054780358280a983b5a36ee7680c286e843fe4198c357e28. 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/QZDA82493036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6df18c5243e90fc3546fb6db32e603ea00867295c76043a9d480b0cb3cc99. 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/QZHN72418088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7b6b22c4bdbc7bc3085814e52f697bf0008fe2996a734b9aafdff19981063. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN72418089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be2e437f2293c97e0fb6a3efa37691e2bd505aaa10e2a9e38416c58fe5376d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN72418090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8756cdbea66ee2c1bb3d11151dd20f39de25b0dfc3c46ca1a387eaa380ebb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:36:34Z), 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/QZK6N2491565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac26da16aa493deb3a8558f5439773098131bcda0dafa6f3e060b300d2a2780. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWZ2463998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a805d8e93babbe0c8dcf4bd2650500d9d43cb8f35f5f4c1f9b6df27dc556ec4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTB82458950.