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 0xf9d398b84fad8ca1f355f1a9393771e1f4495ca7632d1c434db50e77958927d1. 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/01215b14-dc23-46de-a8ac-641800ffb37d.json and https://artists.proofprofile.net/proofs/artist/01215b14-dc23-46de-a8ac-641800ffb37d.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 0x18e150f3210e1619f291f3a95c4a4df2985f46f5e020dcb59335d57eeb7f874c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZGLM1998795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e71b682aa98affec1fab83ee192e670cda6b8f278382d123dd76edd54b8d9f. 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/QZGLM1998797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c83bb9329965e512b90df682ba803be986b0a9def79fb2b543415ccc835a0d. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/BXMYE1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907830e8c86afc97ba835f5c31f5bb3752653073c0cf08ab362a2aa3a56aad44. 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/BRLRE0300140.
Funk Brasil Relíquias (DJ Marlboro Remixes / Vol. 5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c971c5cea6fd2fb2aedaf137f0de6e620ae7c897e1aa469e9e875517ef1e04. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BRLRE1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892cf6c85e5dc9e25f8631300baaef0b33bd2b6dea305bc2834913cff57c1b8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BRE4R0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f072d92e2bcd6ee5b649ecb7b58d8c8ad13e7209f5d8f192887e6c97240f71b. 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/BXM2M0600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892cf6c85e5dc9e25f8631300baaef0b33bd2b6dea305bc2834913cff57c1b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRE4R0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e356fd100793dcaf336c48794817c0fba090710ac0767ded5353f533fb641. 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/BRTYK1000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2689e6453435c462c60e0c3277799726f47b85687323a5ffbbd0e64f4cd41. 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/BXM2M0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892cf6c85e5dc9e25f8631300baaef0b33bd2b6dea305bc2834913cff57c1b8. 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/BRE4R0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d749fe9a6af199bd03b1a9b3b18d48d2497f6fd9198284da11adc96ac8b4ec. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXM2M0600023.
Pot-Pourri: Rap da Felicidade/ Rap do Silva - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533f7f7a34985c6e24309400d4c0930f7f0638ed70bda6da8a86c6421eb01210. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRRGE1508194.