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 0x5d161c757838206e5efdd1b69214c749bc3dde72e5d485075eb89bffdd2a5c3d. 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/33b63a64-c925-43ae-82d1-59a7b0c1b94a.json and https://artists.proofprofile.net/proofs/artist/33b63a64-c925-43ae-82d1-59a7b0c1b94a.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 0xc7ce991ef810aacbe2aca8c5187c88fb5fa4ff476fa98d32adeac8ee6d3689f1. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FR59R1631945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3567c31330e604832dcf7e7952a9114ceaab6a6104740dab4fc92bbb90b7001. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR59R1631947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f34a7b4dc7e4f9cdd1956d164e5642e4f889c84a49b7a1f54688516cbfca6e. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/FR6V82530400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a945571f3ee53ce6c00ffe3aafec0946d39c808312c4eb1bfd54323d44f65. 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/FR6V82530403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a806632c87e68618eada1f25b3319bf25dba6894c577d2a49fe5b8c396269c. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FR6V82530404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1898b9251485ebdd470074f9223bf4e76ce28691772ad20b74528ce0ec896da. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR6V82523546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00da5fa0af2066834a7611e7d75cc8b955db58633ca862bcc86d3fbdd584c3b8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR6V82609650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7198a9384c2a7a7ac6dc3d7ca4e41748896e42163ffdd195a0948c9ce59462. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR6V82609652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb937fa50b8818e09883a1774b7d00c553e7ba7a80d5b99336992073bdc22b4d. 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/FR6V82609665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f4f6d9c339d9115b28a1d229dc26110f71bc70ff852dbba45dea96a5d76e44. 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/FR6V82609669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025263bd6e5d1bfc8261ebdec9ae8b941b7f9966d44dad482e486b263d718424. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/FR2X41443034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c37e062ec8a9a5bff82fc004f3b4bc215f56cc725f11049cfdbe3a7836bcf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X41443035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6afeb3f305ac426bdc042c6e01d653f42bd709156ae3a940bde18f1d7dcc5. 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/FR10S1459649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeace049e1b129048c9764c59f17205571929adc419f2e5b1e121bff2d570b3a. 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/FR2X41479837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aa18a2d3aa7cc41c0aec17b1854c99b6fe7a44324a5a8043bbbf7671fd55c0. 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/FR10S1459531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac96cc8820a6741de63128012e7d784852b9bc5f6b9490313304690b7de16b7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR10S1459626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26cfe76febeac703f7eda4e35ac52883a3d64a9528b550a092a77434f21e0d4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR10S1457858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dc5a2be3ba1293d04b4399b36960135393162e9488c2aa5c73ad6e3319e27f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FR2X41442696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe909bab8f0a78d651fb7c5398ef2b37289b103231f313850b4cf294c3814f31f. 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/FR2X41442661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1677a9aa2f5383abf8e8244c1e1b3711ac57489fef16ad69c74178ff1398e798. 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/FR10S1457716.