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 0x1e82cb4d1da549ca8516f9fdffcd543bc131de6a2371e95bf280e63dac167b37. 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/afb54d74-9ef6-47a1-bf15-a33d4bf9466b.json and https://artists.proofprofile.net/proofs/artist/afb54d74-9ef6-47a1-bf15-a33d4bf9466b.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 0x9ea8dfe6927751bceab231c4848cdf5376f2ecf20a4e662d2850b8295ee09cb4. 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/BRUM72000378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4cdbb152c251d53145d1e1be827c996e4b1e55bc9a79447af44241ebde95b. 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/BRUM71707006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb6e2e832789809159feee49686230c7b9fc25179fcf96d2090779bc562214. 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/BXEKO2200002.
Prometo - Ao Vivo Em Sete Lagoas, Brazil / 2019
Origens (Ao Vivo Em Sete Lagoas, Brazil / 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a0f126f51daf567a0db8f44871037c18a0ce0543286f1f4bc2b4a7b620a72e. 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/BRUM71901817.
Prometo (Ao Vivo Em Sete Lagoas, Brazil / 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a0f126f51daf567a0db8f44871037c18a0ce0543286f1f4bc2b4a7b620a72e. 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/BRUM71901817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5d7d3c3bb9d67d0b569423a6e42734904d558571cefff448c8a39c610f6c66. 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/BRUM71707003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c982c842487edd403bad0ecf2c9cebf2438958dd63306f8ca525b7f63e29fd. 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/BRUM71707004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4cdbb152c251d53145d1e1be827c996e4b1e55bc9a79447af44241ebde95b. 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/BRUM71707006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73383cf47f81f80d7ac25108f592c805caa541bed16bc0badc02b05702e08647. 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/BRVOR1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989799e86791d05d3de81364b015a7a912438051caff20995d8fba1ca9eb0235. 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/BXMH12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf41a2b84146e6c9f76971bf4cd611661fb4340b7d097e2d786c1b4f7976250. 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/BR3751800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2c0ee81593a33abf52827a74868a3a5cb80c08ce023b0853d92add0acb28c7. 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/DEH742328226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4cdbb152c251d53145d1e1be827c996e4b1e55bc9a79447af44241ebde95b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRUM71707006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b0921e76a7ca697abfa6d3ef8ee1a306dfc1bf7cf64dabaa5b6c68fc24564e. 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/BCKE42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870d4435cc25cf8557659c1062c330026865b9f65c0ab84fdaa896299bf3563a. 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/BCKE42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0252b0c04a3ba76fe77ff9704bb5c0fb7f0c2c690d65dbb71c93f333a3c324. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCKE42100002.