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 0xad2d14de18b26abcf3ba2a725cd36b1e6528f9b2c71ee13dba311cc5dc045991. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4870d880-4e11-4447-9017-8a53955ba5b4.json and https://artists.proofprofile.net/proofs/artist/4870d880-4e11-4447-9017-8a53955ba5b4.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 0x79b3ad6c0091f0675270cc62986a77da864e437c7d5d253829a26a4f8a2360f0. 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/PLB380900192.
Chcialbym tu (feat. Sokół & Marysia Starosta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498f20741bbcfab838d38c8a1a2e88e1177273eed0a45bdd0362a286679dfd5. 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/PLB380900193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c977f7940a57fbc220ce851a61f5cce1f3dfb4cf678d15388e375447edc15fe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PLB380900194.
Nothing Without You (feat. Stephen Pickup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036dc64aabe6b20824e901d737e0b5730164f3c41ea7159bda86726b06412e45. 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/PLB380900195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8e6941c78a7129b8d423776d3ff708ae2f1bbadae74cec11e0bc72d8911b9. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/PLB380900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f0d52fb7fda93e58bfb498c1442dadf9a32d7a831ba792003bf46f100930a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PLB380900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc345ba77e2e2213d7d71eb3e887cf21debb7514bc0ec79a09aa91b61be05b6f2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLB380900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0563180303570cc079c3c428ce9c2a9e8c2adbf0c7a5397adeb059ebebb605. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/PLB380900199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd358da0dbfcbc592a23b586d367c59e912e8bb2739c4da8fd777ac8066b61d. 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/PLB380900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9f43e4cd21bef15019b1f73fa46fcf5d204a37d702bc55c99f77ea6ce82119. 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/PLB380900202.
Jak mam zyc (feat. Jędker Realista, Blady Kris & Deszczu Strugi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe733029b9b8e0d605457520844e07b70674bfba8b8af0370ad283747d8a9e4. 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/PLB380900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c79b1a8b8bb4bf839d42e9788bfa22632d281813a780b98c32a984f7434a7d. 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/PLC061302639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df83e8962501c1b93d8da28d7ae53ac16f169882a6d2a2878a3a730fde7d158. 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/PLC061302641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062a06edcde8e04113fecb5d39e34303af58f76b03e8456b6755c9628254440. 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/PLC061302642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba665dbbe802552490c33cb8a8e3ccd167fecb04f0b93c3d9a59ec0873af71d. 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/PLC061101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc021981af826dd5fc46034267c1c300dc478f14147366ab154dc8714771498b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC061101181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758c3fcef5ebea465be9e93fed0328bfb944c8864360fbc249c05fb65e828d31. 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/PLC061101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e96a8bb17f0691084e6f01d309544db06b35e3b4f70455ea4d0762b9c0db301. 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/PLC061101186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e7fa0684b21ddfc11d563340e3af48f8228ee09d7d8c67531251c3ccb97f4. 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/PLC061100600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f38d6e8be3a816db21ae11ddc29a61702f406b1c86ef33605242fd1ef6d0238. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLC061806801.
Halli Hallo - Der besondere Mallorca Song (Tom FOXx Chill)