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 0x1dd8c2cf4f98d6ab3e4c65e3e568ea6a2c15e5382136f84ea0bca30078bd6435. 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/c3fe0f6d-73cd-4fcd-b185-70aca89224cf.json and https://artists.proofprofile.net/proofs/artist/c3fe0f6d-73cd-4fcd-b185-70aca89224cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Rapport Brazza (Bande Originale du Podcast)
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 0xd2746e5ec94f9c27fe644de99d5473e97a2802cadd0c5fc10346af28ace20ea6. 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/DGA052211319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d231d854afe5c47bf0a4185ee1fa9f5b85092ddde9318733b63f7aaf28e6a5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USA2B2201773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f0e94fee461fcaff2531a380ca8f10f77fbd74d12bd951a58276d05203575d. 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/FRX872125635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbbabb20a7e3a5b6b71c67bc018b9ef236d45cfd58f58a59b3b3b35bf50da21. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DGA052211314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e77ce039efb9a150c058f124d2a8fc7818e9a6bc5b956418407688abbcc448. 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/DGA052211315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c30c46f660abe06b1d69c9ae198c2af55ba75459255b5defb229c238ab7a97. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DGA052211317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6519fc6de97b8b858b8c3488804cb6dafca22eccd8afad8fcbef2493f639d942. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DGA052211326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1e73ba4b38d53c2675b873f046d84c05521bf187b358f6ce275e26df245b5. 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/DGA052211316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd486a324ca0faa5b74458bb68264824304e7f6358d052dc60fbc9e40af208d7. 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/DGA052211318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7f0c18e48bc46c366f32e900f9b15729313f849446eaa22208d8fca300f75. 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/DGA052211320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67843c7bd1afd7eac0eca76e76ccc1ca57134d4b6f62a3487ddc29b1c84a9fdb. 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/FRX762268164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418c1e7e8ddfd8e77e2a598c985809e4413c9d60f0dbf7e1fc27aaa75026f974. 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/FR92U2400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ef6ae03521955a60dec737d5adc7bf5e9a7e5ac5eca8ce7932d79a1ba91cbb. 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/FR92U2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef3da4a98e924ac5bf46b7e92eb3e23315e5fb53b46493f820069cea5016fc6. 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/FRS182142430.