thumb|upright=1.35|Astronauts on the International Space Station experience only microgravity and thus display an example of weightlessness. Michael Foale can be seen exercising in the foreground. We
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 0xbee32fd6d10ba8043adac9a57ebbc47a3a46cad0d89103a60b3e2c692d0dabf3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d8549d1-5cbd-486f-9f55-d0dca5d7d112.json and https://artists.proofprofile.net/proofs/artist/2d8549d1-5cbd-486f-9f55-d0dca5d7d112.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 0x7c92e4f0a09fbbf1ff59a738976234fd1b01988d22016fbb3949e3a9dc4fd70e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62571613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaffa1610e859ff6acb64abe34be7dab5166f1edd0cd56c5931955bd89a2aff. 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/QZDA82572575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84119b03b5bbe90bb24c9753a83d85c27a5559e51d4c024009a2aabaea146c95. 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/QZES62575217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756654a9305efe8a6863fc4c48e3f2da4a5835a074876ec93b714281b05af18a. 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/QZES62575128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a530985a0f23cd849c7cf4a41aa2efb9da4a34c63caf292c1d07e340d412307. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES72536222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bae82c3b0958b6b158d84e4bdf41aa437fa0bcf586ce64a6aa8898b89dbc33. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES72536364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7936c80289c2d9d195e8d85b2089fa35070b9e9a8fa6bba125015cec257530. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES92533497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df8e202604467c11f6e5319432c932602f9310694c74f25fc800875de3ab3e3. 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/QZHN42534271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef469093314d5ebc284e6a07667bdf8a0e048354572d2161dde67072295e600. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN52516454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecffb615cce46646f37f13caaaa4931bbd2d47d662b4ac772a3c1f09a0fb19f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:32Z), 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/QZHN62569569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0633a7324c1cb17492257bff681400790249aec59c095f22cc0d01df02170963. 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/QZHN72563495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bea010f972441f204c21084afdc8137ff09f657104087e35b9c3120d206cad4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN72564787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b5403f0301f6a8f05850f0ae8d6e677a45c1b16bdd9f7855cf88855b0bfa0d. 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/QZHN82599629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a25edae8316f5dede9b764b462fe2b19bc0b7079cd8f6ddfcbfaff64d81acb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2544145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c96385c199e9f1f42cfab8bfea3d7671b11777e6b493e3f46ee1b6110b266b3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZHNC2515812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2121c8b3a445d23291a053213fc74bdbf89a8203b1cc8173a8a9ff116ec276f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6P2521969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa0dd34d12af7b2563521f6824ac10cd6bb3d97a68307b6dbf319c7b4fd271. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6P2520145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8536096c545aa6288284f77d6adc3ecdffb7aa5b0989954182fe091a1be347. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6P2521965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565a566a766a90a34b554e1a9fa548a070c3bd759ebebcb4c02dc1180c8bd221. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZK6N2578105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5010ca2a72933c2a5c262ee16dbe55b31c5adbe4ff4ecb6c8671af568ab9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:28Z), 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/QZNWU2513033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779f818124c92afe6ed67d5afc3a4b7e0849d0575777765eef7c2796a00f9f8f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:42Z), 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/QZTAT2593218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1582d0b6f065b990d6a5d915932600a40d46d91e864c523757d5d8d5fd2e57ed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAKA2501880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639b17564f1c7924bb44a63b097ad36a9ee11c9549d4fcdfb250f6cd51a63131. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:01:27Z), 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/QT65W2561132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66485c61f09c803e7d251e12c2e498ed0904141fe499fb359b3795d93697d6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:26Z), 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/QT65X2524989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52af656ebc646ca89d9c7ff94ec73f3f395040d0fda08ac8662ef1f2fd97828. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:10Z), 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/QT65Y2554500.