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 0x8810cd2482f8f8a89e1a9a9151e4dae42d5dcdd0a1520ce1928f22c280ffe147. 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/21d16ddf-b055-44a6-8226-ac66a7072f29.json and https://artists.proofprofile.net/proofs/artist/21d16ddf-b055-44a6-8226-ac66a7072f29.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 0x7fc1ca174f5151aee12a2db2c57a61eb07513a5c174c6ea318b9df105dfe7c8a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BRWMB9705899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc920489a636e648df0adf410fbc1271fcab958c8858e2b7e40221fb9c4024c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRWMB9804177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc856912efb10a235a5f9cf7944ea326b7334ca323957fecbd8d07a968423ef. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BRWMB9800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c575ac0a7cb995fc90440168a07011a18c800a8503969c18acd7ccd0d7bcf3b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRWMB9804180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c41751e7c15d390e70da5833ba2328ff1818f2122eb9367f41b50b9ed274d78. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRWMB9804185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902cc4efe634ee0c3b3d9310c7c19f5dfb5fb31a45ec98b4d3fda48eaa9d71ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRWMB0000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82f96ccd949faae1254271d0eb307dc18068f37cd5908833772f3ff84bcb7b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/BRWMB0000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d92041d44046f126ac49e2e5d210064bb614682db712db146abc38df260b0. 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/BRWMB9806645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6fc56e6f85643f2baa88a8a6dc4032ce6f99b3ecc2dffbbffa32944203f14d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRWMB0000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4795aa35317623448871e1e8c73a1dd5f09f67b496c1ee535d1cee4172c4160. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BRWMB9806021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a83d25a8209a58b1a62d343349146502f840845b33016cef9645bdc54182c7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX201728901.
Cheiro de relva (Participação especial de Irmãs Galvão)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ea04e1a22d5aaf163b072d169cdb61a700276e21cfaad4cbfd39587658deeb. 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/BRWMB0001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce72682a817ea1faea6398147970ea114d44a6c544d0bbe533b6a7a1ae12aff8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRBMG5600015.
Dois Gênios - João Bosco & Milton Nascimento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265696e1c411fb2231c4631d5b9e11d84cef52990ab808f6780dd3a5e76e9cb. 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/BRWMB0900534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3797da29b8f921c9c95bc8288057f6964bd0cc32adcabdb0843b7c62dd3b4f. 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/BRAPI0501208.