thumb|Baku Street at Noon (1861) by Alexey Bogolyubov, depicting shadows from the sun at its highest point over the city of Baku Noon (also known as noontime or midday) is 12 o'clock in the daytime.
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 0x256ed0b1fab0424f15a35f235b8c4178613ef5c8309f64078987b89ffb2e1a06. 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/a62d409c-b1e9-4ea0-8ca8-7fcb4358bac7.json and https://artists.proofprofile.net/proofs/artist/a62d409c-b1e9-4ea0-8ca8-7fcb4358bac7.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 0x90429a1d452201da5437241c9b2a4d35fdf11d4a3c54826571d44d7b7bbe588b. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/PLI360520830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1019ebcfc4d07495d4c493c1d024a774606b6724f203a3be4b44fb32207fc395. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/PL2DY2302622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdfb74ac8482c2101fd2daea3629ca026c057fcd1b97ba03a01f77dd34bc6a4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PL2DY2302627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee60415b77a66d3e65f4fe1a692957f7ec2b60ffb92f3e96ac2bd57662b8b5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/PL2DY2302660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9efe1e3ea3b06b69e30700bf8fdfe26a00adf2d8d4651326f8e91ceeaaa99. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLI363627890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c0caeb42acb529b8b01ca0eb2f9b2177b43f1b9f3363f92ddca3496b6781b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLI369186230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195d9c82fe581b45b082a76819cd634ac35db86f882d61943bb0a57933126146. 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/PLI369186250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94527fac8fcb6fef27fceed5c3b72ec0dd63d69d31da202eded58c1d07d6585. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/PLI369186260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828fdb7ddafe9c7ce50899ddada260a610747ac907d05a57b579d83d35a06c9e. 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/PLI369186290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb172f8a9ea60691bd0aca1e19e070a39dbd083a1ecb5b5ba904bc141dbb64. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/PLI369186280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61690bc17be76fee6c807b25465162a80389165ae46d3485f295f1eccac36f7b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/PLI369186340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7bcd69d6ad315a4067e6232a3c984c2e206765f29dcc559acc55902f79558e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/PL2DY2302635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c860ce4f107d5e4aa7636eb136ed56d52cfe4726629286457aa323c6367f4b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/PLI360523930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd163edc8605d603ce6e902a72149081d68a4c68237628f8173d85e9812653a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLI367113230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc6196ae2d02ac0e46429227aebc2250530f117366387416b40e373f7fba502. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/PLI367113250.
Warszawska Bajka o Street Foodzie (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b0acf747735e4a130482512f2008048bcdade64585c8609c80ac64c84d0c9. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/PLI367092210.
Diabeł ubiera się w Stone Island (Morza Południowe - Instrumental)
Przypływ (Morza Południowe - Instrumental)
W oddali (Morza Południowe - Instrumental)
Silencio (Morza Południowe - Instrumental)
Ladk Zdrj (Morza Południowe - Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0828653daa298b9a4c4e2f3a13072b37315e3295359a4320885889efdb15c5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PL2DY2400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7553af994e7fa38886a53e8599aaec0ab3b2cbb35d6159f1c7c92321ff2231. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLUV72500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb390577899fd634448a5f78ee499b3c312fd2559938f773673a0282af36a8ca. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/PL2DY2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63262686a9f7511800d1e041d10e09d287a4e03eaebdfca27f823711eff46640. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/PL2DY2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae56694c6dd32dfb5c41e7263bfadabe240a1cf7ee9e4783fa49cef12f73975. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PL2DY2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56835f5dafce1c9b33377506bf7da2a595ca719825be29c3aafb9b8c88d4bf76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8247fb2d384700acedd9dcd3e90aae1c14928b2c19dfaaf53709aa0ac07dee. 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/PLA681601964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbd2b285ca71b16ee28fb4eb8d4d37e0296fd7468fa4722ba12f2018ba7f024. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee3d147daeaef2616719ecd0ba6795c7a05f2eda68432fdf82db0b38f2d09e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e98fed7b92c54b1739add6bf33dd78949133e2f57ef7f04b4c96c93c5a693b1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA681601967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbccad1ff87e8b167a06576a0463bf71271fd30ab8032b2d16010fc0936ab4a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f16579b4af9a13ea1f1b23a61e4d25790d0ee39b814e8b64bbdfaeb06b385bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd911f19d8b8298f1724d396f02d13624f28d1405788970ce38008285348f9df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622669651816bbf125faf0b694b81f473536d8f99b1faac48d17b14988c2b14c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e679e03fcafea30332b239c5af73166fd33b1bce71a97cecb2136b8ca3da9a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67734f0a7825615fbffdbdc045c8cb749196163f4e3297a0143f8b1841901c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA681601974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc636492d02564576cd47f2159e5e6fca313684252e87314b74b7a744403e376b. 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/PLI363662320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc55eee88add92137d8d73d47c93edd550c75194eecd5d4fa3f4dae725c549. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA681601975.