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 0xe594453b06acbde4f55bd6be659b9f49049579bb7ee70c2d2748e65c15d1edce. 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/383ab758-488a-4de3-8ff0-bff69a70685e.json and https://artists.proofprofile.net/proofs/artist/383ab758-488a-4de3-8ff0-bff69a70685e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pontos de Preto Velho (Povo do Cativeiro) Nº 1
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 0x123bc6fec47732719cee92546a744a555481df55a7bf39e99003363a1c07b21a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/BXMPD1900277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895fcb2f1476dd8d54938cee75f5aa417750b12d6e111b45e56fd0aac92e30b1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:04Z), 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/BXMPD1900284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c41761b8695cf495b70be614794a63f31864e32a0492367e47c2c04ef23334d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/BXMPD1900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b680c9e2e1535f52ded2d110871678456e5ef413751344be5b54060a32edb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BXMPD1900287.
Pontos de Preto Velho (Povo do Cativeiro) Nº 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ef715bfc4229dd1768195809e1f03f8a8d919bc4566fb39e75eccdb05c54b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BXMPD1900293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db44d61751b0402f1c52903f863845539b545312c94d347d8d8584c6a9cbeb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BXMPD1900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a5589066d57587e80952276c304387006f9a316b74db4e1c52a702216981c8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BXMPD1900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462667eb00cf162afd55ee67c25f9ec0f4b16fa8b82afb93c6c6ab97a67372a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BXMPD1900307.