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 0xc45e07d344defd6913dd5c4449b3d7ff70a0ef0b61cf854bf9740c7f607cd668. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f89644-b134-49c9-bd7e-0d411c31bb3c.json and https://artists.proofprofile.net/proofs/artist/b2f89644-b134-49c9-bd7e-0d411c31bb3c.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 0x324781de11401f7a9e4545c47b51d3ab366b013a0ea0b1692f6830dcf84ce34f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US38Y2403277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb6b203015165f56940786b68bac44ace3e08172ec1c904f26c9e0a60475417. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US38Y2403278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ba0f27f200d512ef5399b59ce8db334fba8089780653b3c469c3d68839ece. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US38Y2310386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82280f795bc5a5248c13844664f5b877c23b31538110c4c63067e36893182b30. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/US38Y2314560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2996a6c3aa506d72bc11694965ee3d967e7c42b5a6cfe261f4c128ae9b55d8. 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/US38Y2403280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c378425c4b34ab78bc6af8f17d0e47b41167e204426fd773e98de131c81ba. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US38Y2402553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f060c68cb811e319f59d0583446849bb748e6bb0ffadccda061c236ef9ebac8. 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/US38Y2403286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a470d760be65261f2936e8744963170d5de24e348318d01e21fc9314e3bb16c. 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/US38Y2403287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca4e15f31ed241a1df2d0d537666ec44ff4fc9921f79a40f095ae2e58455d4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFYZ2392107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68c0801e74442bc4b1f450e66911a0977bbb574fc50f6ba4fa1dbccf0dec5cb. 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/QZRP52287303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae676606a5e0f426507cae5b11ea6a7698fcda13460287f2ba902b71a72003. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNWV2268121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ba0f27f200d512ef5399b59ce8db334fba8089780653b3c469c3d68839ece. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US38Y2310386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef2bc426a98200cc0752c9f76bcc495b0b2f3207ae23efa26596370eccb481. 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/NLB602400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad86cda72bf684c86af35eeaf487349cd9bb29a9577ced48a94d3483be611c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLB602200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b04ebcb10e459246bee25cbb7992c9d1bd8914f76e9195838d0610d1c6da0cc. 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/NLB602400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26849af598bd486c8fefe836e3227beb3188390965c0b8fa3dddde7d44fbd654. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLB602400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c928f73584e754649d19d181bb975d3e7f58ba4b26516dbd3651970930e3c35. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/NLB602400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1fec90916e47a1eda1251bfdee9633bdf491f796f3a4d9d4813e22a51e6291. 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/NLB602300372.
Slaap Diep, Slaap Zacht (Coventry Carol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd558857121bf878e33f250eed7798ea559250ec3673732a05ea1568e2c62294. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLB602100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593bb95cbb4c94611cf303a545124cc81d358d70e639946bf259558f67e927c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NLB602400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626a9def58b65b506c637cd4ca67da26ec6430c6b7bef4b9f8ceb4e3bdca07a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLB602400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fd37dfd42a622bac70eae0f5e2f250bb3ca473df562ff096fb30bc21094e82. 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/NLB602400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498107e7344676fdb4ff153dcea8848023dc1ffc5930d181d686a06a0ed45de9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/NLB602200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2ac1cbe6f5c8dd42b9d255f84904254589744ab5a0079aa4fa463eb095287. 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/NLB602400317.
Renée’s Ierse Droom - live in de Kerstshow ‘23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f62d88726b0f1776652fde63c05672363dbf1f876f625b22f9e9bca449040. 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/NLB602400318.