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 0x7a87d89ff4f15b15dce1d4153f903f33da805227c98e417b3b5abe79f01d04ef. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98a07117-3b86-44dd-8c68-61b804e25ebc.json and https://artists.proofprofile.net/proofs/artist/98a07117-3b86-44dd-8c68-61b804e25ebc.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 0x6fc41a46de13eac46fad4a95414a613ffbd3da17876e6483c667f09ae8e370ae. 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/BRACT1607433.
Polkinha do Elton Nabinger - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde93e0d50d199da6882eedd3f031faf704b20b141a93a1aae717df54722dd72d. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRACT1604218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1790a7f9d406a2699dd6d8712fad8f31934685b801e4f0d808a66fbdfd13545. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRACT1607428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa164c49d07bc42e59c02e1f9d4f65bdda675b69f84919f4e5cbcec63424dc659. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BRACT1605326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604225e7cc238914d333e555ee75bb09e03164321605c3e8b62001ea27dea11b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRACT1607429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd7fefae7d0d0bbbe775d7b41e971201096411c6b866cdf82317e3f2cf7a708. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRACT1607431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8bee846604168ad3e6e169e51e9b1563e9c11112cdadd368bf48bf678dfe34. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRACT1607029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb8511c4d5418650a12d63ce2dde943bea28c9c56bb019a6d83f366e429c5f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRACT1607031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d59343ddeb571be723a4927e34eb33ffccafaccfcc52505d5e1903faad68732. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRACT1604992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e89c718cd849e7ca6fe40979b65f74f0cfb432308942557533f14042ae996b0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRACT1607435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d92c14266f7edb87c4117314db03f24a6ee4557db138cad70008ff17f22f4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRACT1607033.
Chegando Em Santa Catarina - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fc9b53a954fd413980394105737157de04c4f9cf26ad69b013ba70bca7c43a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRACT1604222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceaca298ef026c79ab0f05af04222dd52a875ea31522283977a5a1acbae639a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRACT1604227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3392781d3f3274f3b0b613fab53bb052155d6dd0b7d581e4d8cd843ed25ad7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRACT1607434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba9a38216eaf634c42db435673f145616f0f9219ac165484e1b25fb4b93646. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRACT1607022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a4b0626d88783e4825bddb3cbf58c25834ef45527ef81a83921e74bae69080. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRACT1607027.