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 0x4a52195f7bc3994c326656333400d0c075fc9fe164b6240943bd42ee953cc680. 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/f521d803-d4ad-4138-b8ff-553be63a9ffd.json and https://artists.proofprofile.net/proofs/artist/f521d803-d4ad-4138-b8ff-553be63a9ffd.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 0xe5d3288ce2f4b4f97dfd592fd08b6948d3ca963ef1ba894a33b205d6c1898589. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FISBA7500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025e4b45eb8b922aaa91309c006b1ed597d418227d736bd60e48f901a766f41. 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/FISBA7400801.
I Don't Care (Collection Dutch Punk 1977-1983) [Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3364da4e692e9167babf86ce9cd98d8cdc1e1306cee225b45db400d13480b106. 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/NLL6R1602263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ccdad1e99808d9733869edc220b655df7ca9f7e61afc6aee831cbaceae154. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FIUM71600270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66608cce583d820e68a484c80f6d65523853416062e86a3513395511e12f876. 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/FIUM71600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f03c7102b0cc32df28783b7a7edbe08456299743360dee55de417b82b2ee3d. 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/FIUM71600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0e273ef5d7846983be680046bd64563849ad3087fc143d0a8ca33c4cf1405. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FIUM71600380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79db25f2cb8d081963d9f645c37f7f37315462ae213fb0ba4c85e41656258d6. 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/FIUM71600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8dee0c4e33a628c54a62b3ffc4ea92ccba9fc8c353ac697bc554c60ca394d. 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/FIUM71600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0d774c332ea2ed69561f28d5bc1a4d82c727aa67c8b0200ae47583d43025a5. 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/FIUM71600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89cf389e743b6aba94bd8846a381f4aeafdefa45f6eeaa13cb2bfa9abac50e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FIUM71600316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c19cb463740af64f923d61cc2edd1dddc3674d84b82e88658ab121abe9c671. 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/FIUM71600381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62680c135a9628036efc40c3edc8bffba5e2c37d9e78c2389b1d8444c21d2d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FIUM71600382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fa29507ea87836b14c24b2ecb7006553a42cd87f236eef1e5910117841a683. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIUM71600383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b192246358ee497dd5a34859df953c7e92e501c74fe23d1e19fef97fc9221a0. 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/FIUM71600384.
Juice Leskinen & Coitus Int (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c176688e71441e4f5a171c983d99b8a1debc58184e1f537afc44e9d79b13d. 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/FISBA7300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f0c97be8c708559c2767fb468ce752059c2ce81d8d7c384e9369308f50f236. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FISBA7300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245605b5e66bf4101a663949810cfc73bda5f72a15d0910ff9f6a8ef0cab63c. 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/FISBA7300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5957672b6d1836fd27fc9db265c2abc74e381f00cedf9622f9351b775bba6a6. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FISBA7300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4d1cc6a16e94798899c6c0065166b9c180e29e1b58128d6a8795bdf5b54f7e. 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/FISBA7300007.