thumb|upright=1.3|Christ Driving the Money Changers from the Temple (El Greco, Washington D.C.)|alt=Christ Driving the Money Changers from the Temple, Washington version, by El Greco In all four cano
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 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 0xed5fbdfce7189daab87046e31d42bc367f71a624ce862570a7bfd2ee8470d2c4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d061df13-9ab3-4367-8c44-02015bc534b4.json and https://artists.proofprofile.net/proofs/artist/d061df13-9ab3-4367-8c44-02015bc534b4.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 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 0x6bf148efc2489bf89593427496552d652fe93d81a0ff9de13fef2cce71ec476a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6H2472213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6672ba1fbdb4015115c84bdece643ba1573b267806007965bac2834985ad990. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6H2472215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bd4ee089cbbf0ed91d664d46a7c096992ecbc2f600c7ef7330abe2e402d2ba. 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/QZK6H2472216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b79d5b3dbf3e37af642a8987b9a63a5a1d6f56e95a705435a7634740a8121. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6H2472217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815975705fbb0b018990245e182280253713ea24b48b3b1061c9141e8c897ffb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZK6H2472218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c02de731f96b1c9bbe9870132a235ed960df88b1c727c125d7966f8ca4c3e71. 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/QZK6H2472219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22afaa737fdf2207f4ca9b0a700cfc03df8483d77052a45a6382de36feac5c2b. 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/QZK6H2435208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55232adfa94871aee62a42e198123af1a3845aa3ea31c8e8e2bc9a758e3cddf0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6H2472220.
Where Does Darkness Dwell When We Open Our Eyes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673cf99c033dae76fa39a4dbfe732d5a73f7177c3b4af25a7a674b94e65b638d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZK6H2472221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55232adfa94871aee62a42e198123af1a3845aa3ea31c8e8e2bc9a758e3cddf0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6H2472220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22afaa737fdf2207f4ca9b0a700cfc03df8483d77052a45a6382de36feac5c2b. 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/QZK6H2435208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580608d74d41f160d6a824d183783ee9303402f39bc7eeab23d567c79b1fa13. 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/QZDA62346621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a2f9989288b160edb6d1975c10dd3f2a1dedc08333d773e3f41de9cf1dd847. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI2259846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b01f14a77d12190217f2186da03696fe0eeb6931c71bad9cc111cd6336fc7f0. 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/IELOI2259847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b32694e61d8b4ac17f8d393044e1af488f9da7883485827b0a83dbc5e9b8fbd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IELOI2259848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbcd9330e231430e828b3a8d3dcc0b51fae2d924180a18886443fd4cd659d22. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZTB62288915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47fc5b78031996ce47421aa6178d307d66b959b117acda5299317ef24f9bf8e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZTB62288916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05c3d4fef5ec1c7487abd04f77e3d459e413ef545298af7de95ef4d4703f883. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTB62288917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb394cb3ad82433b3a435ee12a78c759bca311b70212efad2ca35ee2c953785df. 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/QZTAW2218306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633239ab16cb002ade1e5530e44096c6ff11ba9a37b96c53e08805b4079db7c3. 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/QZTB62288919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77986afd350a3de86f1e74918b379f4b799bdd5446cb3b8cd44ae6e14ed283. 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/QZTB62288920.