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 0x03480155d42adb5399de81d07bf0727c897f445c69941c3746dadc6ab384af8d. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb2a8f75-2efb-4b21-8afa-b4824dbf0a74.json and https://artists.proofprofile.net/proofs/artist/bb2a8f75-2efb-4b21-8afa-b4824dbf0a74.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 0xbccab4e7e52cc1b24923e163f1ea240d24da350c02f4746eb5a5ed8d3f54ed0d. 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/USCGJ2327338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3928ed659ded5c2b62838cde1e42b5e3a6a38ccf84bb5b19dc7f302fda68dcd. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGJ2327339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f2f2bfda444de20d80f341c7f716a7e09ef39a39e77569f2fc02de6f00b1a8. 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/USCGJ2327340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed3bc62c68662058f8a70a1cd39725b4c3f6fe895821b35a914ed8fff18df1f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2327341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b39b8c9c6b11aae10532a8c1e4341aa05e38fab498c07f0fdb2fa2645d7b4. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USCGJ2327342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216fe3ff596c5c26aa756eae394f36b3cb6ab930fdcd67709efb9677ca4b2635. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2327343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871ddeee070578054e7e102b495697c31270cafc6a229621d7a22eda2f1384c1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGJ2327344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864eb475d33a15ef62b8e8b512fd85902c3c08bb3f80f91eaffdb656a7a31dd. 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/NL5MF2102603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00016b0a44e70c6277893209edeba7a8ef67b618accf4742a06f7f04c81deb66. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82394599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685a1e86b7b3b029c2888067a8cabc7e1391afef5b8121710b8c8d49ee6088d9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USL4Q2162651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9c36ee7d1f54488aa7e79db238914c7191233620c8863c62ee014919f39480. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH2112885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf9eab82ce46a131beb6da8b615de2347769f4471400db7849b5426f7b93e8. 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/USDY42045174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d38f843830226ccce38071445e67de7db8b9d8fc7bc98a33fe8b07e97365637. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USDY42045176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf3504df29f4b769ea18a66ebd6f1df5d285e090a77e9ca3b286d1089552e11. 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/USDY42045177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71463afb29c10e332db2b022eb0214a784db5eb0b17ad358542fcd81943812d3. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USDY42034514.
Kaster leidinggevende (Waai Liebie Langa Moo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c31c7953262f9eab7add1a38f55cfaf04377764454df264378123c6dabdef. 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/USDY42142131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9964b6f6fa61a8b2e92a1dad40187a6db1eca67dfc17d6a197d5d3b8279b0294. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USDY42142132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8093e0f4238347b360a63ffc4707b10ed11af5a542fdda194a94f1b5cde1eba. 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/USDY42142133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d301db2d505e7581040815b40f9a6dd5f5043cb98b894f8611469b951fd312. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDY42142134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634ca02dd3a540bda5aba0ccec151c68447e95e005ec30975bd8aad0ea131516. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY42142135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfeb56666e3c47b6ecb367d2f34457fb5c107efe885d8a32b09e97e9f8fadf2. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USDY42142136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b19be30f66273ab99cd46005a852ffc4f49759008e07e8a720ee110e1be370f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USDY42142138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d103db627b6d2ddaa9408997041231f082ba933d2811452a86c1d411048bea8. 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/USDY42142139.