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 0x621ef45fb923c8e752004dc58fd61320be70384b866351cfcf8c5d81f6bd8452. 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/13815497-f8ac-49fb-ad09-f096043430a4.json and https://artists.proofprofile.net/proofs/artist/13815497-f8ac-49fb-ad09-f096043430a4.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 0x1dbfa4618b25f3a1fdde1aae0e9469dac5fe0a28c4090aac4e8f85533cae41cb. 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/PLG551200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2085baa05447849b51f7f91f86acfa492ad18ed4e622f0b4b8d2bfa659096. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/PLG551200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe235c51868272df950e2574186b59130e28e71a52d3e14b7c409909470bb02f0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:17Z), 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/PLG551200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d0b01d5d6dae5f1bf6cac282741c55bab4add41f068da3cb3a4f0faf531ddc. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:08:33Z), 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/PLG551200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2ec0ecd21cc283e81d072625bdbf27314ac48c48fe1f2404d1ab277bc098d8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PLG551200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a013f38896b1c0328ddf0c3ac6fdbb6c1e49537af1bcfceb552cc9d1dddf97. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PLG551200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1dd63ab46439c69e2a91bbc665239930c20bb2e8c39aae1b3712893c9c61d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PLG551200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80076d73d41d73be7d9957d2e28dcb8a72ef46ca0eb62cc36c5a288245fa259. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:10Z), 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/PLG551200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf91d4f20bfb5d144566e298642f26418477bca9c94b52f292172a182da164. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PLG551200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1080e3da6e1e69737275fad963e37eb1ec9dca6b87f6b30116e25af6ce1e35. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLG551200187.
ZABIERZ MNIE ZE SOBA /TOUJOURES ENVIE D'ELLE/
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25963957bf1304e9704d06cfb882fe5081c2ff4b4fd929584ec965df63bc6cd2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLG551200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e83c6dd068c15590b5e4f80ff6686920d6325ac2233bca30a3f34f1f1c992. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLN031500108.
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