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 0xe36e8272731a230808f39529ff1dcc08789f3dd9e1c60d153c2b6d7de7da69b3. 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/49809f2e-4aec-4a91-b4f3-9f8278924799.json and https://artists.proofprofile.net/proofs/artist/49809f2e-4aec-4a91-b4f3-9f8278924799.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 0x7894dc38f6ad3b908a557e6912557b655f925ac2a5c2149a2f9811de20d6a112. 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/SE5XG2448585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d64ab1064ba74a04896f7bb277ca10c8ab43d61c14459a8fc69ec41facc52. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZDA52064678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98983296b8c6743c61ac55c357cdc25e2762c4aad9d8726d9e99375879169da8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFF2382389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb852dfc5771885bf79a346f12d2bdddcd0195f8cd434ff6b5936060689d4f8. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZTAX2385379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43dc9217234ac2d4b3912a918b0692270841e108b0b38a93696c6b22abe2fc4. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZWFF2382386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641220599a299e844af4fd16426aad9ec3f3764dd27f0e084bffa795b25ca416. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFM2381993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf63f0cd4ad9207de7aaa28918587415ca9ce447274b61a48e3047c743a77bf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5XG2448572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0048ee7fed30602adad41c531a09db6ae6f2ee80e0f5db29a4f35938fe980b01. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/SE5XG2448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73352d622ed5d8fa3154e4aada5bc02e5c62fa239eb18e38349b92c75e1db46e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5XG2448577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874199358ebf342c8fc85b1cfce1eb3daa59ad19b2e588884228c99714043207. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE5XG2448579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1759b1a7b366ba1c749887c253c0f6dcdbe73c265e00e83f0398e3f60f178cd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE5XG2448582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9567005abc392fd819e029df63fdf264aa0d0a235f75e5e4420389b9e47a1af0. 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/NL3BN2100060.
Mardi à Casablanca (with Inkonnu, Jok'Air)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f331b3cd2ce4d6f4c3dcabb01d0682a776550a54fc3ac799016028b5bb5735. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11905437.