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 0x8dd91ee082653714c0d5d412a1e8868f476a28f19c1d7bdbc4cc99a50906fec8. 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/da350c87-463a-42fa-bc83-6bd1ce102a14.json and https://artists.proofprofile.net/proofs/artist/da350c87-463a-42fa-bc83-6bd1ce102a14.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 0xa13802f0ecc291b1ae9a19905f91d4522e4c4abad51154a2a1e9e4a9bdcd43a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA112300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05e74417a4400fb7056717a0c6ff249c01d0c22c52419f3bf7a0a0376587cd. 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/VNA112300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1faab9ee394cf6fc89a2cc1dad0a4704e6e5b8cf3f586d67ec2ebd6d0403f16. 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/VNA112300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e9b3dcdea48a664e23c1054ace6faa89ec6df83d1f3a2234077254f6c38f6b. 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/VNA112300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ac2833da679770fb1d323942af4948f98883443fda564a82af7e430999b57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA112300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913247ccefb3578d4b0c1e4940c942a9a4e75315ee00694a60032a1920bde893. 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/VNA112300846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c0fce976527aa3b26e49ed5e854efd881f4dffc33b8fe5ea4863eb68579a3. 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/VNA112300845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180f4be0534e81cb74a12379a119dbd63df779e59311ae0a8038df845c3aec5e. 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/VNA112300847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce387760043140cc5d0064b64afed8b61e69ae948d91661badc43f22ac61defe. 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/VNA112300844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6918300896f8ec3aab949ca2dd0fac0250070ce457229f8314b8dc065247b913. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA112300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaf7bbc9a138177efaac183cf3634f8852148704b4c5af0ea23aa53567ea40a. 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/VNA0M1914292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88468e7be42c744aecf98fa7c8f818de0fa1778e4cd1c283a93d5695fe7ffd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1914293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d4677b95ff58e4d8ee13a36e2410d78c11b9f92092ee8b88193d63afd4e257. 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/VNA0M1914294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3702a3d2b66f3cbabb3887da275d040ad1d9a203af7f484331b687d3a7aacd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA0M1914295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fbbace658eee5ab2b725245367202026ddf9ba5691ee392bb2a8a9347664f1. 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/VNA0M1910127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e44e71b4415278a14da7432c4b91e18c35afb345a2fc81e10f7ff73d5dcc6bb. 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/VNA0M1914296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2a36fde6e2c4a58bd147d9fcc323ca29f970da095b84ad466b1cbcd8f8c0b. 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/VNA0M1909431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f31452be6410feb48cba679a90a6e31505147d952475df83be44f3ff8dac674. 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/VNA0M1914297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cb928fd728854c837d7870bdbbb77aa1c856383a7d5ad2ed73eb1cee7a017d. 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/VNA0M1914298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab631932ab6954e6c72e57991554fccb1fcb19febb935da0847ab26783ffac14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA0M1914299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1faab9ee394cf6fc89a2cc1dad0a4704e6e5b8cf3f586d67ec2ebd6d0403f16. 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/VNA112300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b700a1a008d4eb9470a6eb25f3f2d0db44cfabf8bc918cc317a239c7cb3f594. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA0M1924453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fbbace658eee5ab2b725245367202026ddf9ba5691ee392bb2a8a9347664f1. 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/VNA0M1910127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2a36fde6e2c4a58bd147d9fcc323ca29f970da095b84ad466b1cbcd8f8c0b. 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/VNA0M1909431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb315915c66aec0e2e0a7ea0f7af400fe76232ff827ab3b5c67a6395f417e4c. 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/CAN132200252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be72ba9fbd959de05f99f69148344ba90e6cb4ca975d1d3a331623bfce2383. 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/CAN132200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd58054189805d58e4f5f577113888a506087c6c058ad51259e461dd40608cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAN132200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde426ec5248729f231fded9119d038f021f7e1d382540ba7b6f7c02c9362a4eb. 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/CAN132200255.