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 0x2e9a77f882f4f1bd93f2eb6a896539868d6b77ef0a065e554f247b354de5d9fb. 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/bc18c4f3-9093-423c-bb09-29e014f5a8a7.json and https://artists.proofprofile.net/proofs/artist/bc18c4f3-9093-423c-bb09-29e014f5a8a7.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 0x2ceebd927bddfd7e26d6a91d049404f459a7011656a5492826d182731a3b7c16. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:15Z), 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/BCZY52400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2331d890698b7db0d8e89c312387ecb25a4935b75e9dd8faa3c9c4afb5c7d26b. 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/BXKG22401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de79c0258811635250162d34ec205f273d4709d7b7bad317a72fba9ad22a44. 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/BCZY52400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a0d11cf7c8a1422099d20e32d984519edee3b0c484629aec14409957b4645. 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/BCZY52400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74208ee46a5aefdeb4225d3cb9d31afb9241d166153c2a27622925383fc63fe8. 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/BCZY52300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1543c45195eaccfa2aba148982083984af5d087d969132f61411c1c5fb75a. 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/BCZY52300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27efded9e3fe550704a7b09aff538dc017f4d5da8ea35a357bf3b895911a903e. 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/BCZY52400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a14b5df246e4c1ee8a385c184c619f8bc24fe67b211226f49589583e00c048e. 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/US7VG2565089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3450929093df197bad8e824d3b1140c802c911c43a9612a45a6d40c4648139de. 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/BCZY52500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7a28925dca8e67bec01259b1f1d4974b3631ee9c498ea8548dcc5de86780ab. 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/QZNWT2598537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a57b90f559787380bbb9335119a0b449af7f2c6ea5a3333df6e9654b4feb35. 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/BCZY52500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda81a6fb71e240c5449a3740aeb2afa971519c731931c201cf9c36a97a2cdfe5. 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/BCZY52500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd878786aeefed45bf58d1a64fb9b2305ec7a31c0785d74446ed1522d8a4edacf. 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/BCZY52500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d3260eac9bea2eab2a65e1ad5865acdd477931268fc548f77fe6283c01965. 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/QZES72568031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f22b910e92ce6bad34a492f941b2195eff2f7746896ceb8975ef03bc8bbc9. 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/QZFYZ2576952.
MTG - RESENHA DO ARROCHA ,CALMA VIDA TÁ DE BOA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5b7485eb0397e80cf3c8ae8acd5e4b682c8cd4d00965fbcb62c4e852997189. 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/QZZ7W2407764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29450ce3646c2d0271190b822b96aa0a270982c1eb3b5a6f265c9b6639b5473. 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/QZW9L2405284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c275368aaaf52a910e82b45a48719c4a99d34be1bb994fdf68e793236c2361. 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/QZZ7M2430414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165334e926d2e21c58dae3b1e2b5f4be0b534d3df705ddc82d9b59cf2ee68d61. 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/QZZ792405929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad058b5f7e9d60d27e4f29e975542dc8872f9239da22513b496bfb8a797a7235. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ782465986.