thumb|right|200px|Danone brand logo, used since 2004 Danone S.A. () is a French multinational food-products corporation based in Paris. It was founded in 1919 in Barcelona, Spain. It is listed on Euro
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 0x26961283b41084f3ca6545121b5bc7eca155e4d552da67a1d7639da18777f1c2. 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/353ab0dd-33c7-48ec-bbdd-95903e017f66.json and https://artists.proofprofile.net/proofs/artist/353ab0dd-33c7-48ec-bbdd-95903e017f66.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 0x5d4953e9843ba33d40e6b8bb5c7e8a20e6412275f4e8d0622eaaf89fd68e838f. 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/SE6XX2217158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d3c0d2945d6223e8a766e95bd450583590cd33493105e403d20c3fc6d01079. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6XX2217159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d58a0daa57cea8f7ef7f918bcd7afa7c02fd16724f2b8d6e541c47483a929f. 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/SE6XX2217160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4610a501911f119be492e936b7c12e5eab1a63fec96d2b74cd9cc298fa4af65. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6XX2217162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4d2233f2d2afb87bbcf9bb21530a9ca6a129447617f59c4a3a06d735af0a1. 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/SE6XX2217164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e42baac0467a71169f51e588d76f9e2a6334cddc75d32bca3b4aef6e5708c7. 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/SE6XX2217165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406cd2d3a9b3efd9c6391e0fd9febc325bf7b06ee30328c414603cb57b206be. 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/SE6XX2217166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2ed1b209e8c6afc1065be777bd67da5f17219485341d293a225616ac37a5c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX872274066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c853945e28707ccf5bc73b4411da0fea56d528c9961c5afeb2389c4628f8ac. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/QZYFZ2396464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fe3fe1a4072834132e00dfad32f0e9c5c79d138b4e7a22465c1fafb66dc1d1. 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/QZYFZ2404432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe570d78678d3d9ed9b40e1bd7de073e3c9f25c6bfaf0d9fd2a2da187a74715a0. 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/QZNWS2486502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8322de545e188f9bc13af831bb6bec7d3f79aeccb759cfbe6efdfc744dde40ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDW2430852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd8a9854992deba8c4ee7a9193af27d6cd089dd1f7a8ec4fefca109eaec1031. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDW2470316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e88f53ac54bbf2c57b09c4490aaeeaa753a52f3f17bf30cc6ef573b5a9fb65. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ662444355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fcbbfa685138764fa8929dea61dcdecf6dd3c3e1f9740e4fc32d6c1f28b719. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZN882535191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59edd5a35a590b31770e5e1f3135ce08f1b3d2557e535981b2c1a629604c798d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDW2592903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d55bb2d7091642c20a2919e5e30b7453df5d63358ce247ad324f07d4e175c36. 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/QZES92443745.