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 0xd960f4254714d87b3120f192b080c850b50d63f839433b82426b38938f3b4640. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aca3d33d-d6b1-40c8-94cf-d1ff636f13d4.json and https://artists.proofprofile.net/proofs/artist/aca3d33d-d6b1-40c8-94cf-d1ff636f13d4.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 0x965e18c76d2614366a1f9fe9d01965f1a1a0c55e08587f2835fb05ab37594c87. 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/JPPC02312289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bea08c0ec34be2df23964e589e940266baafa71d4106a87b290b0dbc3b2ad1. 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/JPPC02410100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee739b0efcff522edbc8244d88f72f4b4fe11e908d17efc00937030553ab8a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:03Z), 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/JPPC02410101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df2875f6c135bcddd7a9cd3d80c17eddce012b4507c114a65b7b0cabe3a761. 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/JPPC02411270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965e18c76d2614366a1f9fe9d01965f1a1a0c55e08587f2835fb05ab37594c87. 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/JPPC02312289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca321421796c48a7533ffde60009550688e2ff5337e0d26d28e09df215730f. 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/JPZ922301514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1b1f845c2cea65af9f110e19311eefe41e089f4adedf792a2a4ea6bf89fa3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPS2236675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6c825e03057f4f939a3dcc5ad96c706a0d74e2816ad9f467acc1dee07ded1. 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/TCJPS2236757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e417c054bee227cf1f810172ee165bef67b030bc4ecb38e223c70023cd382. 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/TCJPQ2120759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824261df967190f1af3fac33cc3441812a629beede1c13c547914ee455fe302e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPQ2122287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f330dbd23ca40340d995363a3874056f197853d720e2adcf7d4e9f61f2cfc6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPQ2122310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f41069b3089e3ae5a2f922ea0fb52c478735f01b603c927133b3ef6855811. 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/TCJPN2194717.