right|thumb|380px|An Abbe diagram, also known as 'the glass veil', plots the Abbe number against refractive index for a range of different glasses (red dots). Glasses are classified using the Schott
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 0xc885549ea7c013493b67887df2af577fb6e5291a5b9352fabb868d73ed8c63fd. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ed56b08-30ec-446e-9c31-9e1c80c86456.json and https://artists.proofprofile.net/proofs/artist/4ed56b08-30ec-446e-9c31-9e1c80c86456.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Accretion (The Tympanik Audio 5th Anniversary Collection)
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 0xd0c869abe9c2de3f0b7f41b4825f32eaa4e04b6e55e2b33277829f48640fbdf5. 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/USX9P1237625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a7fbaee47da233f8407c70113864d2b6e628ebbb307a6c746626788c553aae. 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/USX9P1237626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61086164f7c93cf83b539325675899c4a7ccf7b787fdfc844b716a1c66b6f23e. 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/USX9P1237632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc9ec666b83beb60dc17788493783fe8346db95d89dbd54bba0c0b1a46ed1a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USX9P1237638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e614a4ff503892e03c6b83c9dd703210d3a4a7e430d07378f18e76a9ce0975. 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/USX9P1237666.
Arcanum Vol. 1 - An Arcane Dirge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c8717a290f864591aece5b7bfecb32bb1f883bf55bcbb07c7cd331adfdaf4c. 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/DEBL60926083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b75e2a9bd6d0dd0d1ad6836d92dc7acc51282765ade68e1c132c23fca98f4. 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/QM6MZ2420910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b4b87b1626e1ff2181ff84162a1032002d1eef7f4bfa1bfe4c1962cff352a. 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/QM6MZ2420912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56918c99552e3709a04e16deeb30ceff18843739ea360c6ede4919ea066c40d2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM6MZ2420909.
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 0x7fa911d0efc0a55a540b8ab94ac1d9e7fb9eb8891de9bffe6eb56583f71201df. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6MZ2420913.
Nyarlathotep and other tales of cosmic dread by H. P. Lovecraft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828f136d71f594fa4afdd9cbcc47318ef697dbb49b264781c868da4699fdc13. 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/QMFMF2414526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf071e3d8649ab02fc835152912ab437eaaa23e21513d2c6f26273795a9da7433. 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/QMFMF2414528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203d0b9d21dc9863c1b058a286d892bd5bc17f9eb537458237b38905fb98aef4. 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/QMFMF2414530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e65ba007d2c3197e6283ada078f5c40be3abbc200a5ad7c03a28a13933f64a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF2414527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50586c3d152ed0cea7b909c1eb60e6c839e78ae5effb4278f080bedecc90ee5c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMFMF2414529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a790eef1f95d4c59342ba919cdb38f84902b94c1f1a1dcbf3f4fb7a39b06a. 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/QMBZ92440968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d20f8269f5d5414b6c6363e0e17637f93a19803bb9d9d34d22f68ca775c2a49. 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/QMBZ92440969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c931851c1fd8bcce62aa46ea9f867db0573b1a447b8fe94c102485461278e41. 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/QMBZ92440970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed86e1abafab5b1165397ce250ca4e9b07ed6b7987fe73e544352f1b1c9c985. 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/QMBZ92440971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41278f842d0515477697c093ac7ed8518cd222e0049c2b2ba97999dc31561a3. 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/QMBZ92440964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e8200d0d854fb20bd454f95a91e617fbf1671d3aedc666ea72fd93221a774b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMBZ92440965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76f9bd5892cae96ae7926a7903b952c7504c38286ae752f0b3f9d2e7e7ffa9e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMBZ92440966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6906bdeaeb7e59086b9f9d2084db18914f1210d8510f58481b9f568ff4dd612. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMBZ92440967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751144207d0bec149112073df8b0394bc46b7e7ccbc53b95d75f677653c8f445. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ92440974.
Sprengbagger1010 (Carl Ludwig Achaz-Duisberg Sprengbagger1010 Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9b8fee2547d95ec4da1dbc8448b2d1c8d49451cbe67c2c87557be5e2a9d12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX201585179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f9be7ed4b5e16ba808af7abea155f4747eff3b1d46b4bc848f11a43781e79c. 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/QM6N22081003.