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 0xd750fe5c0174e4f4cfe6f4b5671c4d423a3b3146eec86b48beac060dd3572ee5. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85d71e2a-7be7-4edb-bb14-5aeecdecf2a3.json and https://artists.proofprofile.net/proofs/artist/85d71e2a-7be7-4edb-bb14-5aeecdecf2a3.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 0x50cf3cc2830a264c6272a0ea9cd87e2b662cac9758748a4437ce0a78afb2dee5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLRD52303199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0454b529abb185dc7d021c1b978f59053291182b7fbd5a1f3b53bab85570ad. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLRD52303201.
A Falta Que Você Me Faz: O Trovador do Brasil, Vol. 37
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070e1241ed45ee32f0a455d751a64543106399d3ccb13122ab9bf0e150db2ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLRD52217287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d83079d27c91ef8d22deab5021e9f7374bafe4ac761c511ff752b1cbead31f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLRD52217295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b6c95177bfb1120f318d771d04ce13254221675bb8aca68f88a4778bd8ad0d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRAPI0000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b3d9ab23a94cc6cb70aa8b1b58fcf7805681c0fac1eed79c9f6461442b7ce. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:48Z), 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/BRAPI0000608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0b6259ba5697837bb843b912313f945ff8be877a2c69b26d923ab45f076e8e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:46Z), 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/BRAPI0000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2643a39e98ccb85f3a1eb91375727f1a2a3c2f2f7e00a25043537395b7bb6096. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:47Z), 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/BRAPI0000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe57036dd5b50de084d6f59529e03c06c74e68afedec9a494b4cf5a6c7f80746. 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/BRAPI0000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7f2d69ea02f24b945371c0f1a47c01df5ff3f8da775316ed3964ad8a91b4c6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/US7VG1475467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ed267e47b2f82c9394b0c973f6fd05d8d091135aeffdfd341910cc5825668. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR96X1720891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1880375ee7622576faef9ec0da0e902641b23e2863b8694efecf5eb1a5691423. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X1720894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80607a0bf98260d332c79860d448ab12548f999749d7207693008b202e7e33. 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/BR19C1303849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc6bfe252c759bf5b031ce616f5f1b6435384a91d3ba08a9ae3d8bf0c641eb8. 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/BR19C1303850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd329bce2f96c179a724cac926e2558e099ff869bbe08d6e6a6bc91195c7b717. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BR19C1303834.
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