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 0x3fc6489adbf9849d40d4b3b867993de69718c6cfb322dd13a7b7fed923148b9a. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b3eb7ce-cc5b-4220-8ae5-2ebdd482d586.json and https://artists.proofprofile.net/proofs/artist/5b3eb7ce-cc5b-4220-8ae5-2ebdd482d586.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 0xea8cd5c9abc67f514d5b684b92f0e7259c7426553a95e616bebe5d2cf5473014. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLE871619801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a79a5886fb73d39f271ea5fa9f3e3882d681c12b89709a855a6fbf32cde18e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/NLE871619802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08746013ecfc2bd39cb9d88ae2807ff9211c447c60503be5e0574c74a521c7f7. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/NLE871619803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed401bc048addb076586809d5dd52dee8552ea084b3010d956371efa349f7b04. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLE871619805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b717d4c06e433e2807bf8fe3e1f06e5882c67580511b2798444e0981514f8. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/NLE871619808.
Karaoké Playback Accordéon : Tango, Vol. 1
Karaoké Playback Accordéon : Paso-Doble, Vol. 1
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fbb226a9da6aac265c65e6a56e2bc79c7cdf0415eabe1b4c10e93b9ffea696. 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/FR0W69998723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1627f56d22dbde229fe75a422582a4b090d3419e56f715d88cfbb78e53e1e1. 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/FR0W69998720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b783572b13fb6b88aff6084f739751b2b7e179570bf15b4978a0128f9dc30e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRY510778669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8aefce292522127a04b5372b0cfccdf2f54e173eb33b32663b5143b0b77c5e. 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/FR80T1100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973c7842ba97522e28df51fb4e7eb605712a11f56daf2ebf643791bdbe9b915e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR0W69998724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a20097e2fd317c765636a345a7a6642fbb5688653219ff8c7c6111553caf548. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR0W69998725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc328020fff99aa3314eea31370f15c4e86d89af9089ebd66563c3fd69a76ec5d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRY510888048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5735b9234c1c0ea0b518087ea619d08b577380297d6b016f31fc8c8375fa525. 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/FR0W69998727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049919d4d955e50589f8df307957b19bc6c5bc16a322e45dfcd79593974ba9ad. 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/FRY510778663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e3e9166b6424e584f364aa737f8d5b6e6afe8c0bc7b3d1c5f8c4b1691fe19. 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/FR0W69998737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef008421bdac62611a5c7e3b841ee4c7acc1549ab8756aea4d0280ce47c9b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR0W69998736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457693741ab043209a95f82a3bd581b8589ce046596d554f6016f6a54f8e9fba. 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/FR0W69998733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba63c70313bb316bdd09041de934b5f6a91676380dafe4a591118d8bd2d6faa. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR0W69998730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb132a605a6b1860e707438d55758d276481faef889c285108799713dd5d9e6. 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/FRY510778662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3279cf8a50f76b504efc162731835e9a41b8c87703c1bb8dfd985589a6ebe524. 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/FR80T1000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6c65c756bb6b81e65c357fcb114ae8ccda4f5ce5be148826d0f745241344d6. 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/FR80T0700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8534fe89b37494c6a6ad706df434b627bbe05a8c071d166b468b42a311bf3a38. 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/FRY510888010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8534fe89b37494c6a6ad706df434b627bbe05a8c071d166b468b42a311bf3a38. 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/FRY510888010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114661611c32387251f40f92d702d24c1cbea4453a9ae6b48c8b4d2a9ffab06d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR80T1000481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fcb9da2ddd02c21ad165734c9c2e455c0de28d2280c264a1001001b719b309. 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/FR0W69998791.