thumb|NASA astronaut Bruce McCandless II using a Manned Maneuvering Unit outside on shuttle mission STS-41-B in 1984. An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailo
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 0x16e2ebb1d96d7d265c1d4da0b791431ff07a75c921d4588d571763e71f33320b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4eef73a-1220-4733-9a96-ec53b49e691b.json and https://artists.proofprofile.net/proofs/artist/e4eef73a-1220-4733-9a96-ec53b49e691b.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 0x359f1b6e0ff1d48be5fe7ebb7fca2538da61245049064d5199e774b8b4577dca. 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/FR6V81846668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214c0e10373e84afb1f785078d21f36f335d25ba245ba796bf97e18648ee2512. 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/FR6V81846669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f653b23cfd8135a5ef8921cc75c3d730308a04d990deddf2ab51323b39f56f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR6V81846671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46dd4c139475e6ef2e4644992cd63e216dfcc0a4a18588e9ad3e9fc5e1d04a. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/CA6D21000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dcb2a7682bdfc878c01411265fccaf4d56afd8005b1a18104f1477357d9958. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CA6D21000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd40428282fb07bff967dca360caa5ed684bb36214ef518fad398cea20c08498. 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/CA6D21000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61889e11f3b2931dade069b2158d48d439d04485552184eaee1c6e4712261c8d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:15Z), 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/CA6D21400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff1d8936cd3736ece4cd4e6b39c5e2b0ca87e5e3bc9c74b223d4bd140cef06. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/CA6D21400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173f0fab86247f55bc733e526469134380a83010030a56a44156144afc2daf90. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:35Z), 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/CA6D21400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca7e6c58bc5af94ec83a7e3749ade17f13387d7e3c3eca03af382e920de0b52. 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/CA6D21400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d15a8aa5c02bebacc6afba963184ad8f56f6eedc7ab592567135ea4a60b723. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CA5KR1501674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5fbb1bab8126af25ea96ccfd5e5728df953d092cb93a4284a0b5d1b3ce3f8e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FRX871516903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc1c404c697ae52929aebbe55dab58404bded7ac0490cc6ac59299a949571c9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:07:14Z), 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/FRX871516904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca7e6c58bc5af94ec83a7e3749ade17f13387d7e3c3eca03af382e920de0b52. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:12:43Z), 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/CA6D21400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce797fbdde12b37144f39ab1e324b5824f19d459a7dab83fb7a24cc343785a64. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA6D21400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849596aa8e1a07680efaadbc7b912450446ec967b6f037fde4bf2944ab796295. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2130869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908c8968f61b2eee61682e0a65bfde22351c0c1890d9ef3921487be5b2c3375. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX871576009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908c8968f61b2eee61682e0a65bfde22351c0c1890d9ef3921487be5b2c3375. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX871576009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ec003afd62a8f658493643aa8a54807abf4247789b5971693f225e3706227. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA6D21001012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad337d0a22e13f84bcbbeb82fca864194c6c953352df3a3c8982067bf620ff1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA6D21000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba951a76e52fc8d2f350cf79933d8eef06dd685d78d9a1425286c1fe63743f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA6D21400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25caf62c8aca7f311c394d994d92b46a5745bc2acf7ad245ff802ceda1ef3708. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CA6D21000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25caf62c8aca7f311c394d994d92b46a5745bc2acf7ad245ff802ceda1ef3708. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D21000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad337d0a22e13f84bcbbeb82fca864194c6c953352df3a3c8982067bf620ff1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D21000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258ac8862b0cd0abe94bbf94cf7633040054f556f5b6d81e797332ddb482aba7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA6D21001052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36097ed134d6790631872761b52964c928e698bb17905da4321649ad63be0de. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CA6D21000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53909e591319245eff0f07597eee4d6cb9c4f620a16d4e42a293f4ded97ac124. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CA6D21000304.