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 0xa28b97403fdff1039a00407ac80cfec21bb5fc3cb5a943546b35223d59f3e0df. 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/15d2cd51-d48b-411b-a750-39a394b0a1f3.json and https://artists.proofprofile.net/proofs/artist/15d2cd51-d48b-411b-a750-39a394b0a1f3.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 0xae8dce5a1d5ca0735bdbcfe9553ab3e08f02409a4570dfa612e5f2c59f31c713. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AEA0D1943880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e92a9d9b0eb8d24a58a53de7ec1e78a1e3fa08ac488d03746832fb88534ac6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0D1943884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb058dbcce1cf44a97283beb48175c7c1fa42aafd4c804ee62833ceb0c34be276. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:44Z), 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/AEA0D1943887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475af412cf9657ae465b9640fa035c5b2d2f86d98a2a4a326087704435c19ef2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA0D1943890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47538aba88243ce06f2fd8979233c955fedc593a47360982e86283dea4e547. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/AEA0D1943892.
A.C.A.B. All Cats Are Beautiful (при уч. СУ.ГРОБ)
Elementary Particles (with Vadyara Blues)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da41f83e7b30c63259738432f97813b0e13cb2ac110ead8f4f59f33e26ec6a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:51:18Z), 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/TCACT1683693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa1d0391ac3a1d76e8ea06ac5abbc316ef11b20f12407e114aedfecacc4656. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:55Z), 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/TCACT1683698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad579c405354fc3ef0d171e0d029dde34164c8dc13e037b4d3525a6e8654be3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMBZ92095711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbc63dbac5ba01dfecf1f2f4fe917fac55c5d1fa6fad8c814c2a615eb19330b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QMBZ92095646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6569cf3a3fa645ac075e94cbab39c44187ebe66ef21f9be22d8a06bd79601. 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/FR96X1770087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cacfe5a5624dc04d8c217d4d5826c892148ab130ca87247bdc8e865f0468a0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCADE1717964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe755caa74cf91b049300e2fc1b8cd89d2ff9b1a326b4d6451606a5dec68bc40e. 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/TCABZ1464955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e411326ef0a64056b0a166962ed513dff7d44acd763ca8701245df02c5a59. 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/FR59R1787687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a98ba14faf05a781babab3527bf4d5a3603b24d1ad5bf9e8a916ee74d0f1571. 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/FR59R1795924.