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 0x7b9d50ee2fe28b4235b2cfca7f14d0da4420ceab3f7012538358d3aa84ab288e. 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/39aecad7-174b-43f1-bad9-38d65ed34597.json and https://artists.proofprofile.net/proofs/artist/39aecad7-174b-43f1-bad9-38d65ed34597.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 0x4c803a954993e2c2c2111546bbfa5d4829108c7ca6f6211652710cd082c84c3b. 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/DGA0R2345758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9873ae03b7b60d653d239d61fe24265a9f38664135cdfb3069a023c3350229f4. 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/DGA0R2345771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8e2c82290c3094eedb813fd0c63da9d8fe655c4c4c0d870b0f9fcb2126e4b1. 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/DGA0R2345772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9939f6f5752f37e2435e0d88260bec491d5ef448fefe75abbad83458649dce. 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/DGA0Q2369844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016fe7cd3e1c8f3c27a3ae1e284165d8b06e324c968babe613ac3eccd993a27. 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/DGA072301563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79eb728723b181f33d0ff38b2586831e323f0c0bd505e48d5f778ba5c1a821. 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/FR10S2341393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6d0f458e11154878dd094fc4043a9ffd32b2f017ba2ba6f7cc5b40fcd25b4. 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/DGA052294937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734dd6de1c130e1a80d9c35f4e89e83a88f472f9d0efcd8ead6c579a5a089805. 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/FR10S2341394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a46ec897e365343b0e6d7cd2b5ad639e5badb33ae809d5109acc1f136a6981. 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/DGA082208457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5690b6b87fd0ce5502e36004c4b9928a1c7fa4a2cb20c4870be7c4c806b2e00a. 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/QM6N22328572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20e6dc50a90af20a2f2dea226b0e8033d6a21ffe51613712da7d95e9746119. 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/FRX762466649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324143e35af5887c0bf69bb02a47d641d89151646cd76ec606052771290bfbf. 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/FRX282451815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebede90f5b0edc707e2e088ad2f1cc3aba6c55d663ff5330747ad58877d0ca2. 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/DGA0R2346863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9873ae03b7b60d653d239d61fe24265a9f38664135cdfb3069a023c3350229f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0R2345771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8e2c82290c3094eedb813fd0c63da9d8fe655c4c4c0d870b0f9fcb2126e4b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0R2345772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c803a954993e2c2c2111546bbfa5d4829108c7ca6f6211652710cd082c84c3b. 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/DGA0R2345758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9939f6f5752f37e2435e0d88260bec491d5ef448fefe75abbad83458649dce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0Q2369844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b78981d1466f35b717ab1858e8e603a64c6f18e4987331b76172bc83b5f91e. 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/QM3DF2292339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68769320ff86b8ddf41d384a6ce22f2f3d979d6432dca2604c1e5fa2876dd404. 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/QM3DF2268080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944aca597de069b683b7520f6e28189f38a6821a0917f88b5efb082ac6e92d0. 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/FRX452396315.