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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f607a623387cf05ffd541fdd1021df1e583bbe162f1094754efcbcb6a75fa. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54aa47e0-76f0-4efa-809b-1542e368daed.json and https://artists.proofprofile.net/proofs/artist/54aa47e0-76f0-4efa-809b-1542e368daed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d23f36ab8786a85cd50b8159859b5110699320edd3ca3996f752af72cd79e. 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/PLA380609201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc70cbfab09621bcecc40933d567982221f773dab40ac667754f9bf9179a499d. 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/PLA380609202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c01669aab99794153837abd7d6c401867aea0f55611789f80f1c8389ae6bab6. 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/PLA380609205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09b78bc72b9a5c43032608f75c826308bab3cedea2093bb531857a224c27502. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLA380609206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cb1143216331e4486158da5d636c90c0529db4df9146380f0dc63c777911c0. 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/PLA380609207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec9cdf4789c26b5359d528b72b6a677510cb9098fed6814410c136060eb0ab. 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/PLA380609208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177cfee5c946596248de7b004beb218836eb6a6616d8db8667db611801954026. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA380609209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e3738444d5828b377d01109fd949a19d6ec7a845f184a9261a3231d54e022c. 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/PLA380609210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191982c4c0fdbcdfad403293200391a1ad1c18283bd465449e549f254703c05a. 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/PLA380609211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf4880bb6cca7519715dbf6088f6f79d3514924db7952ad8995048f915c620e. 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/PLA380609213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746a07a3963c27a04719d9872b2f132e15192713369c7fb744de5164a92ad27. 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/PLA380609214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a450d3c1c21552c74b086e0f2a63364a9ab99939b5ef446fef0f7c9031d4b07. 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/PLA380609215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a133c3553dc1b3adf7f82b846993da25a3190c8ba42333cac39c03af1784209. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLA380609216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d32558d6f33c5d9fff92ef5ef26dad3bd525f6d5e75e869c8ae2445e1de5c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA380609217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3802802ae7835f47a1466f06b3833c732d3b6e87695461c75725e75a45b6cf3. 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/PLA380609218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad5c3b01770b8762fcf2ae78cbdfc34904e523cd3625ede7a71aa9288e94843. 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/PLA380609220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e3da6cb202a0104713e1460e0420bff05cc5ab7f57e52a0b28737becf30c6a. 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/PLA380609221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aab57a726f4645db60c3ae5f6503239e48b803b2ddbb3220d2651c4f2fe0ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLA380609203.
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 0xf994e56b5a47cf3ac7d4e0ef2ae4d3e7cc3a341fa553cd14ffccddf4b84e028e. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/PLA380609204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500e797ca2cfef3128a252c67922fa51fb0bfb2051e25cce61f04e3f2784caf1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLA380609212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13775c5273c226fda6abd164a71aaaf96b82a895f6e490f32e2559cf80bfe54a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLA380609219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc5f26e3a01b4a6f1bc2a59a398e9131581fe41b48b1e17049057ff0e24411. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PLA380609222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e041ec3035ae94f6e1b72de723a6f6f1e2b17d5a3b1c88e8703941724b4f855. 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/PLA380609223.
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 0xcdd358da0dbfcbc592a23b586d367c59e912e8bb2739c4da8fd777ac8066b61d. 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/PLB380900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9f43e4cd21bef15019b1f73fa46fcf5d204a37d702bc55c99f77ea6ce82119. 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/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 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/PLB380900208.