Slan is a science-fiction novel by the Canadian-American writer A. E. van Vogt (1912–2000) — it is also the name of the fictional race of superbeings featured in the novel. The work was first serializ
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 0x08a0e6ff3aa543a6d10c3c7c7805a3bc517acec5b674933108ff732ce5339687. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb34ead5-1001-4be4-98a8-0c18034de616.json and https://artists.proofprofile.net/proofs/artist/fb34ead5-1001-4be4-98a8-0c18034de616.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 0xdbeea29cf82b225a4c8d3bdb801285ba46d76759ada52235f84c50577001e0a8. 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/QZNWR2430389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235b5d1277601feaf33638842c3dfbebae74aa13f2f115fcad61f7673fc7827d. 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/QZNWR2430392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e602e5fc53fb98fd62dbe82a1a4aff31dc1c724a36535c24a26230acdea750. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWR2430395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae1401988e1314a44fa6f62a634aadd2ac1a72aa1de24746e1f0b8ad094e8f. 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/QZNWR2430397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384bd55c755572d567ad5129d8c77ca110b5d61d3a5d62e7d6fdcb1f05e9c65. 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/QZNWR2430398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6857a44375d44a8e1928b5d52241ee36683cb8950e8b96f2aa4aed08f0ccb0. 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/QZNWR2430399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4caef348e79a987f8d5ea4d32d6c5c225f4f15098ba0f56dbe0316421016650. 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/QZNWR2430402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ee42ca4f30c5bd3c36da4cf0850bf372f4fe83dc0729eecc52a581140eca0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWR2430390.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af7e883c226ba98939a39614421f66894ec2e56a250558b54aa65de3a01a85. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNWR2430391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb14de24f5c6a063ac2d8c7505b757325b2a1c10bcbb344886ba7aea26a6ec4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWR2430393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bf8cb37ad5e0a8765f26fd1d18dd69dcdf5ee0626687d81a7fe13a85cd9152. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZNWR2430394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d6cc5313855e0b5738e6d2bf7fa14f9a58742ac1d11459c7ca677a27b1a99. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWR2430396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0764ebffc312b588672f8739ae0c4eb76918beec847565e59eadea4c21fbdfe. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWR2430400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427596bc1230d2174ffed3944b5735507fbd769ed49e76043e81b6d80636073b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWR2430401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d87f3caa171bf9399180c0fba098223e8bb4fcdd47c30c5788fa5831bfc07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWR2430403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ac8a101653e6a055864a9acbfef4b709b93709b389effa67857a4e038fb397. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWR2430404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122cc92c02b8a64cf5c226f405e10e8f9470ba40db262d844a16a4ac9974512. 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/QZTB62229328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3053895e318895b49bffc278c47faeeb0ad9649b5f50df097db6c7574bbcca1. 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/QZTB62229329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e56891d60af51d745dfb59b55cb8b9869e6659d84933ede138fa1bc7c51305a. 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/QZTB62229330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c1bb554990677563ec1967a6184eeb9ec053d793c426ea9554e5ae7838cba. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTB62229327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca90347bf8058c4e3d44b3ba31251198c6d88451d7918bc1ec68cfaf0b53dbc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTB62229331.