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 0xef80c86ed2d78a3b0a49ac7eaf1e74a0290ddbc140cedd0fedc962fe2771d6cc. 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/aa86b564-ab1e-452f-b45b-df67f10bdf93.json and https://artists.proofprofile.net/proofs/artist/aa86b564-ab1e-452f-b45b-df67f10bdf93.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 0x6ba310b563f3b001228e81b67f58082070d2fe8df411b17630483271e70bd6e2. 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/BRROF0400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc34fbda6ae95efb96e227deb0cb6717388578fde555b5f8da2e52f991b26bed. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRROF0400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f03670d5e4df274e3588699c75c4e83e981e02856825fe8451d529674d2353. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRROF0400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3fb422020a26af06f1abc460faa569eb5d9f96219341dd51178876ec6dd8a0. 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/BRROF0400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897cf6faf875a4254a697a1c8510ee3da16a7d934084cd0e2518bd73db33f32. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BRROF0400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d92638a75618d05091c02dc7ba4d93ea278d4b721279a94bcefa32233dd1577. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRROF0400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5467d449dd3f14c0e4b018d99c3707fbe711fd84210a7043d73b946873e6dc. 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/BRROF0400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d939a8ce3388346d2ada387b48726c85f4daaf63c41c5944a72a379be013ee. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRROF0400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512a56e8b823f59fe5d199fdd257ceacfb68d915cae732d1f595dde120f421ea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRROF0300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bbb80fad65c018b9e5ecda54c4541e59f08b8c3b49407e54073bf1c0105dfc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRROF0400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0da778545a2d1d1dd26eb9141e360ce2a4a2882b82240861da572b9a01a97e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ662363567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45959c2ae86b5724c004e0efd37f4da785614c042b089a5fc18a5bc0ef70d9. 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/QZYFZ2507069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd085ef70361503c8ef69f0c4dcdac1ef7e0eff0a4dbd4a828e8e110415650e14. 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/QZYFZ2507081.
Direto no Coração: 40 Anos de Acontecências
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9cc46fe34d675dbccbd49609a02e615de8ad1a6a8557efb6c4e26a1d56d32. 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/BRU0C2100010.