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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee3552eb32e087df83619553bae4a5dc3be653c82b65f16434240a3ba36f38. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df4bf172-3df0-4079-927e-d161b0bf6a66.json and https://artists.proofprofile.net/proofs/artist/df4bf172-3df0-4079-927e-d161b0bf6a66.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e828eca08e9c2647f2aa038d0d43f189afc2db42ab9141ba04be1a6ddb8232. 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/FR96X2235792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb2e6db175a72af59b3eac94c68b1c0b208736bbeb797413c940060b6332654. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX452193571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80c24470b27aea495e93ef8a2fdc3122dd8c5b42106f1ba7d420570b06033c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2235793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b079b6fbe602fdeb471a3fbc87943340593463fcf619be5d5edc5d503d214fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR96X2235795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b01dfbf0210a9fcf3e94031ae0b3327abd7536397f6b0d8e4eeee273b154b. 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/FR59R2209786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17e97a8492fef935434859b608a78706645eba1ea6f966744d491fe52995cb1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLR2025195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae4f9d395088794a7a897978158f72c9d2cbe8d6eacd125ae71490c4509ba48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLR2025199.
La liberté est menottée dans l'fond d'une camionnette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e5f8cf86f552a4b97f6dc5fa2877967df90814ae9631dc388d4c4a4568c0d7. 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/QZHNB2270512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cb46a503bbf93e39502661de31c6f3d10feb10bd1e6f6695455b2d7a40f06d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAC0C1300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ac3d890083c749e1ea92fd095be8950a9e24618aec4a5fb904bffa57e58bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAC0C1300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cde069ce09e0ddc3b7350ea1ae26934b101a58d0d058f8dcd20cf60e099f156. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAC0C1300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850067887a5539b67ff09e8394fe101365c3e48153729f94430c3b07af07a8eb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAC0C1300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb391d98e94a94e399f39122222b1bf10cd91014fad7226ecd019c00c2bbd1a29. 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/CAC0C1300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e548ae17769481a7d42352c0e1ecd73f61f039ce98e504bf4d5b0bae120e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAC0C1300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eff882d37adfc77730b60d77827053b5df7a6ba112ce9b7e51bbda0b189ba6d. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CAC0C1300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377c36c0398608f7d0ca9a21ed7564a46e21772ae8ae28c10fda73f5fdb04223. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/CAP901400012.
Productions Organizés - Les Archives, Vol. 2: #collabo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cfdb4a1a3af6b053dcba5f5c4edf388f6e5173f2d479603dcfc344c02d2c44. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY42017705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb891f5c69b26f1c9ec8c76dd329363a650fff6349bde1569fdbe73d1deb8a778. 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/USDY42017724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3570ecadd0de3688421cd0db1f6a48d4c7eb475634a64686a2b808650fbb8d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V81773434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c437ef917797a2bbd8fb178bb376fd2e85e360bb744c6d6f1bdb9c8e6f2d380. 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/CAP901400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377c36c0398608f7d0ca9a21ed7564a46e21772ae8ae28c10fda73f5fdb04223. 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/CAP901400012.