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 0x8f24f164958231287e780e1087b645094bd2c85bd6430cb35765386b69582612. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/990f81f6-8b13-472e-b019-c29e807af3d8.json and https://artists.proofprofile.net/proofs/artist/990f81f6-8b13-472e-b019-c29e807af3d8.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 0x6c8cf28e74895cd43c91d1688e01b1f8782293865d9e8d404168ac4cee646459. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6L2290820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc0f44111856497fad1c9fda9926ab11f2b21ba3ee3732487e1cd6125af6de0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWS2384592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c67c1041844a529f1fbd4c3fdcf606cc134ad6bfc582ff3c1c1b7f7c9af48b8. 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/QZNWS2384593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05429f24a4022bad39c83ce79c4f753b0acdba9123a6c63f8b11f09a006f4d86. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNWS2384594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b95d56b901b0e418edded546227453229692060cf63910e68f4dfb02c2e2d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWS2384595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb17936e1dfc3430c19f445d0350f8ad8442d50c46a62edc070dde652d204e3a. 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/QZNWS2384596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee3b7c04a411c50ada8d442d6d12bd0eb8a806aae9a106d047b67918396a95. 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/QZNWS2384597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69c8795888c7bf3376cee497290c37c53668fec0437019a0995697b06cd8cba. 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/QZNWS2384598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c29851e791bf6529354c5e7c450e15a9b5d85afeba25acc28ddb6714f58c3. 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/QZNWS2384599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6323976fcfd46b8446ace07a076841a1aae0d03624d3a139568ae63dcf22c0. 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/QZNWS2384600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d101201ce0918a1ffe67a7811b53c7939c4ab61c85fb538b7455106a945545. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZNWS2384601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e32953480894efad5ad3d051955348c94c349cd9cf1a74aa3c8f3aed97f2c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWS2384602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e409f1e32e7914f4727a0a541645a0209666fd20f74ec2eb0fe35a7666cb942. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWS2384603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab67616ee1fed11b1f48370e62c25a233d1fc5e92e5f1d8a51752212aacf1b2. 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/QZNWS2384604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c8ba52da0f9d16b3135f24c70118938ac20f77a8662be02e0c53c6674fa14. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWS2384605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6fbf9df2e62083aaa7fc336606bc08c11642b0eb32e9e95c6e76affc785c53. 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/QZNWS2384607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a22a5703e24c3945c672f36dbc84f4b7af07457e6a6ee1300c7788041804a. 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/QZNWS2384608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b52b625ce6f33de908f0bbe0621ed314d510ae4f65db07aa3c399e149e78f2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNWS2384609.