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 0x582ab3abc34fc22f7c0c47f88dd2c8934a9a628a9e08e8a0bb1598409adb91eb. 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/aa254686-7c6e-48a6-9534-ae5895bf12f7.json and https://artists.proofprofile.net/proofs/artist/aa254686-7c6e-48a6-9534-ae5895bf12f7.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 0xa24c6a6dd371eec8d7981e2223d3bbb2e8b7c642bdd72ffa6819980dcff4be66. 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/JPPO02104037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07bf83af0d82b2722850fcba257406ac4661f74ed6118ca7a5d73235b5fb55d. 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/TCJPP2125746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf4d38a8a8841c9d14951878510b76423b7057217eba3342880e8a06040f19. 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/JPY392200674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b364e06ec1b6557cb5fbcf20e7e99f5766e55678674507f98c402f992e9c98. 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/JPY392300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9775ebb034a440b14a5d456ace3d3ba6673007e39b2f0ef255cd096f3bf65f9f. 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/JPY392301167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f887c8d94c49d9f6fa5ae9babce4531be36b7336de3f5177857a9fc546bbc70. 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/JPY392401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8507a9d9b33afbfeae50a76d95d5969dbb426e9c6f73d59213613371e66d1. 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/JPY392301083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77b71cebe97cd8796cf4685fa8e550e2b7b6ffe602495385bdb3f31d4bce1dd. 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/JPY392401824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f14c93e288d1d87ac0bb27f6fb557d37b33a8bd3ac8c0959d72034d85ea367. 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/JPY392200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305bca461ee21d9d36532fb4b18feac1da0aa8237396008d43f2d0621cdde36. 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/JPY392301489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d2005a23834552a7f37ca32b35b5134045bea79f23e2b20ccb5576a7db819. 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/JPY392401861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33510cda4b1c5276ed7b574d81db07741f4d4c3f8a7fdbfd71fc95947956ed01. 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/JPY392401862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f887c8d94c49d9f6fa5ae9babce4531be36b7336de3f5177857a9fc546bbc70. 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/JPY392401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305bca461ee21d9d36532fb4b18feac1da0aa8237396008d43f2d0621cdde36. 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/JPY392301489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9775ebb034a440b14a5d456ace3d3ba6673007e39b2f0ef255cd096f3bf65f9f. 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/JPY392301167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8507a9d9b33afbfeae50a76d95d5969dbb426e9c6f73d59213613371e66d1. 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/JPY392301083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b364e06ec1b6557cb5fbcf20e7e99f5766e55678674507f98c402f992e9c98. 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/JPY392300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f14c93e288d1d87ac0bb27f6fb557d37b33a8bd3ac8c0959d72034d85ea367. 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/JPY392200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf4d38a8a8841c9d14951878510b76423b7057217eba3342880e8a06040f19. 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/JPY392200674.