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 0xe7073cbe7db3ee1fdc2872da78e723bb3d1244c8b592df058e001812f2be7661. 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/ddfffb6f-68c2-47ec-9802-cde85fc7402a.json and https://artists.proofprofile.net/proofs/artist/ddfffb6f-68c2-47ec-9802-cde85fc7402a.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 0xba690a0db7a5287acb320106d97d758a496a2c72c733e37080f4b18c365b71c4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NLPM11826540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42478775747fa05f02473ddc73b37ec7f6aa60956cb91dfd9bfd4a2a953391c5. 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/SEYOK1846229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80fed1389d8caac37f5182899dcb27db9129b0b830b52ad45ce41b2af7d8666. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SEYOK1923205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcfe60bc1a9c1de5db7d19739e0b1ab5fb76fb2df1cb5797ab85bfe80361a8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:48Z), 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/SEYOK2042020.
Neem me mee op reis (breng me nooit meer terug)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577775eabdb5b42dbbd3a6be90beb44e901b1c47ed88d61a92c943f616532423. 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/SEYOK2208150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9c1a71fb69654b8bae15b0fdd6e284ebd9d68fd13f0cba5bc9aa7f4f55230. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/SEYOK2237422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9c9e17e54e65eac69dd4c480b613811b90c1a5601de87478bc6436c0d010d8. 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/SEYOK2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028670c0d5273ec099fbe55008c458a5143dea98ea5eef7046ec3d07bffb7008. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/SEYOK2400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948cb00899703c21d1699176c71ee8c7bc1c834a9f610136dd65b6f6eb5329c2. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SEYOK2400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72115b57616a405c9504f7b3bb1b7b965b15872bfec47f6e85748d7a5990e9. 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/SEYOK2400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554f2985111f014f2eaded2060a90936a8ac1f15df735a6304d97e6bf0aafa6e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK2214647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163ea7edface18b2f234cea3e0cfb1483793c20c20c277d3c6da3b61cebad11c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/SEYOK2400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfbb3b49773d2994bb61ff03b4b670774589afaa4a82cab8a6472d6f2b6538e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NL2K12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b405847a876ca42ea28e5b397c8048415ee97da07694be4020c89a736668b. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/NL5CY2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98249a8a9be220a1cee99e1ff5dcfb8fde6dbbe02e41102c468878768ab388d3. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/NL2K12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfbb3b49773d2994bb61ff03b4b670774589afaa4a82cab8a6472d6f2b6538e. 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/NL2K12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181f3406cd700f089c59667bef802817d5da16e45c2585ca91f9015af460b9b8. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/NL2K12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f1f005e9703976ca59283b6d7b9dac0b90e5b1071149234b7c7ac726534a48. 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/NL2K12400009.