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 0xd195d13b3406ac5b0598ddfd25689a5c332a1dff1c454ee6ae3d4cf11af061a4. 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/a7823966-dd73-47ee-b36b-921f51823056.json and https://artists.proofprofile.net/proofs/artist/a7823966-dd73-47ee-b36b-921f51823056.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 0xe66ed6eddb9c4c20782f726fec914bcbe79372a7b139247fb27bfb3351fe8de7. 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/QZMER2475741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5965d2e359bb48334fbdeba347ecb03057b68673b0885474daee7956e95005f. 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/QZMER2475742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8641aa739382d21e960972d7ad01d874016f8444c7ee6d6f63cfaf1f97fdb00f. 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/QZMER2475743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406aa2217ff90eff95ac8168f2b2bea69cb4d2d2778784fd6c769291abab4367. 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/QZMER2475744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361da4d41ce59e45149885eeddfda9f7c4f83459696072c8d15dd110d4068d90. 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/QZMER2475745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fcea4296937dbafd684fde74fb128333db679e0cc0bcdb8a9bb3dd7f781606. 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/QZMER2475746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09c789fa2520d75c65fe9686d49ffc90dbc9a10093e808dffe9fb049ecc052. 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/QZMER2475747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b44ce04657bbd1b0a3a022f5e5a21a33073800fd3b429957fd1d1af8fbd5b. 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/QZMER2475748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb086694d573afc73e6143a6467de8616df0ae23b2644d6ba2af7bcaa1030c00. 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/QZMER2475749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e567224c77ec914076b010a0bdecec9da2af21a3bc757e40b6f70d92e9a675. 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/QZMER2475750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf18fe7ebeaf36e5a2ed5b61c7d0dbf1dc0ca36485378566e5593d235409ebe6. 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/QZMER2475751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891bdd52bca0ff69623ba85f1e983503dfdb01e95df6ba6a2089dfd0c932363. 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/QZWFL2301675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864e91deb5f039b14c11bbeac3811fd9754d31db3cbc0e244eb47e4497ea6ab. 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/QZWFL2301676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1e6fbf6dd756b15f709d53876be22d7a6c7dca3ce4f969ca06755f870ca18. 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/QZWFL2301677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc06ea02daadde33a82b636811ad8361c81239e6c9bf9e63c8eb9ed810be1d8. 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/QZWFL2301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc53172d757c34936f4c0389a3aee7c23298d78485a5b136af727aeffafe26. 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/QZWFL2301679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49cc0d236cf0983f4a5ff757f8e57e5e5dfd7e08c239072756a03811dba0c1. 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/QZHN62269892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51facf5d304ae9194e22a79cdb8d72e4c188c7240349b2a9775c72865a8ad8d0. 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/QZHN62269893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d0cd09f13d2d0d59cc722f8a93ed5694245d2a915209d22f08443ce6a4b5e. 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/QZHN62269894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3e9f862d21ead633537a689502237aba316a3313f0ca8241caa0484e9c9d8c. 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/QZHN62269895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a919cfc3333fd68b1da1a1ff9d0cb9cd67cfe7dc8d01cc239c709f27313e1. 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/QZHN62269896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066c6d08de2f26d1810b06e67e10e06fa5a342edbb6d2fab008f7dccf997ae54. 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/QZMEP2164179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53ad05b8ec97e6034c536fdb26a15a4d3cdbfc93318edbaa6b66a896afbbb4c. 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/QZTB92342719.