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 0xfbbdf0758b5aedbc7507d574c5d35956f1d8b1d1d1aa3676f5ac3c178de44c97. 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/ee557a71-2aed-411b-ac78-4316dbfd40bc.json and https://artists.proofprofile.net/proofs/artist/ee557a71-2aed-411b-ac78-4316dbfd40bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
É + ou - Assim (Vaquejada, Forró, Xote, Vaneirão)
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 0x00013c55f3478b272eb9a2e9f0bda1ef2647dbf31a805f95fc17b6e09c937b33. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRMAX1402938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3801ccdc57562ee7a8a3c2e06a6030eca8dd231b807f8557503812c0469ab801. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRMAX1402940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469ad7085506ad6b3a9dc60cc339b9b5d61b1e7f77d7a6c12d68da968e7371a4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRMAX1402941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad5c03bbd1cbd24acd7d1a7d5c12df3ebbe51a9d99a5aad1096941105b765e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRMAX1402944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf323acf3e741f12dd626e9e6df38c5f82d27cb2ac23c420c97bbdb4e7186998. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRMAX1402946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e03d20854006ffa16206528d6861e0ff84976adba4c2451ae1656f3e7274e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRMAX1402947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1090fd176def2bb00f1bb3d9cb98142a482afb3b09418754ac25ac32b18a3fa0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMAX1402948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f86434fa9d9bcf9cac31c99012245f0ee219ea117014f1a62c3f95576b83df7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRGRV0301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3b82079c95c01e2231857f8ecf48ba9b11a0c1805ba87a7f63b5b377257c4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRGRV0301972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a6d976b267085a8c83ce7a9ca40a30b875343dd4b69d49dd7713758c3ca4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRGRV0301973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd966a4003bd01c66eedfaab3867f4e540267fd517d1d0a437b902b19f97de729. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRGRV0301974.