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 0x3ba9511fb182a5e656e2bdfe4d31bcac0075bdb8a3431caa6af2f40ca8cb6856. 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/7664c255-24c0-433a-90c4-fb890504e301.json and https://artists.proofprofile.net/proofs/artist/7664c255-24c0-433a-90c4-fb890504e301.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 0x2bb2249d8abec17d3a35315830bbef9a322a3979e366112a986482014296a1db. 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/PLA440400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6e0fa8addacf05e414202fb750d9c8f716825f7936a686d10c7d21f016d56c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PLA440400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac05ac181b98c7f158e103f7ddc91573b5e588bd2e0cc17d0d79f5de21e00d4. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PLA440400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47624ff27fdba12a86f358d639143c0637bfd67603b65d8ca59fce3b554af223. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLA440900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfefef884fc101e1bd4beb1c9e7d6299c220ac31eb5134e46257549e131fcd5. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/PLA440900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a16f051b6303ff2e61e0908d411edef724915f09cf474f4453a4a80b50152f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLA440900305.
Nieulotne (Lasting) [Original Motion Picture Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0234ec311b99a565ffbb0f29b99d562c0d3feb308c161500f2068776569b85ac. 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/PLUM71300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dc271ef86bf6b05f78981d7f04dcd8b0b12f5807073942737c3729c6fa94d8. 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/PLA551501182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ffe5923828991501b5693e91e13f512044d9a6c55de88ddce90167cfeb81ad. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PLA551501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c7b445749f698699b515158f446a049d5ba330737ecefdfcdde9c1defbbee. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLA551501181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7efc0e0c09322964329c86f3b9d51c98f68fa850ca5681a4de3cea1ac25489. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PLA551501180.
Dolce Fine Giornata (feat. Leszek Możdżer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1723c048f0e1278922f885a4268ec574256104227542292c46980a3edd41b598. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA551900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523bdfc74e4de0426efc8366f03ce8326467b38b75f8a4b60131d8271d6ea319. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLA551900129.
Dolce fine giornata (Original Motion Picture Soundtrack)
Zamach na papieża (feat. Leszek Możdżer) [Original Motion Picture Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc8f7c536bfddc3e3bb94670ec9cc88966f2b5471e5211b3edba0b4e8e16c8a. 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/PLA391605211.