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 0xd8961541c071fea50d2db7347c7ec512fb09519c6b1fc2cea774e368119272fa. 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/4d739270-123c-41c5-bd78-3b1aaced4afe.json and https://artists.proofprofile.net/proofs/artist/4d739270-123c-41c5-bd78-3b1aaced4afe.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 0x7203d7b9f95e1ba1873a7d913f49e11fa3bcb1194db58bdb14d201abfbccd26a. 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/PLA550100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51afa4c82b76bc8ff4541dbf763bd90b24f6b98262dc5b0fba86980d9c665de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLA550300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146fd49290a3b257d9ca7e06eb5b43552aac5d84cfeb42243ef8610f2f3b3fcc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/PLA550600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6a14c2fcc307065e6a5999b6bb2e9b615f954e00a4af2a10931ef4233130a0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/PLUM71100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed3324fe9aa43fef02516966387874bb9f31fb26836f517b5068ce4f7442c7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLUM71100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff582c781789cd525404d74f18172a77f9b3035d07f84afb820ac081ee805da. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/PLUM71400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8792b4d5c86fd15bc812da4ec5e45a75fc31751d3bc69e470607ef1be69c227. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PLUM71500682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac100ff9c8cdf9d53bdd1e0e3682476a050f215cc4272fb2e48e32b4ce27ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLUM71800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11847a18d4cccf45afbe0e22d6932065f526ce31c29ac9d5e1afc95a9e72b37. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLUM71700944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe562623a1db8cb518b207460b9b90d419fc996512fcb0b272e3cf7845789726c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PLUM71800376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4e572e78812a38e672f47bfa67b32a0f86f9a55662c278d48ac8bec2941893. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLUM71900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6138b9f8888f1f5d03fe378d519a667351094e8bf0db24edee5ea7c671fd32ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL09L2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8339767801d9ef529a2d05a0dc5736a108ac4ad12fa99bf68d4704f7e4cc782d. 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/PL09L2000009.
Miłość To Jest Wielki Skarb (Daj Mi Znak) [feat. Ewa Bem] - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc67856b6fecc369fa01013c23821962817c90afda4740f55575a3cfa54165f8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/PL09L2200008.