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 0x06299c35ca602a54af990f6563a07b3b4575d2959dabdda2e037cdaf3e527498. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f40952fc-0fd9-45da-b649-c920855a411a.json and https://artists.proofprofile.net/proofs/artist/f40952fc-0fd9-45da-b649-c920855a411a.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 0x42933d130b70f6001f00223536d3581f73db3b08a37e1e12eb80ac161a947566. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCNWM2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7301f4e99b19631ea44a9a51677a4baca9bdbfe43ba64da432d6a81584bd3cc3. 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/BX9L12100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f28d9b304796f860f8263d8bc6d78a94dc7969d1c6b29659c9f95e840752495. 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/BKJH72400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c472a34440f632dbcf0a372277a34026264dcf8074003ae42941820709a1427. 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/BCNWM2400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f478ae8c4e37438e85eeab2e66d77f8acb1297a160215af806e77d4969344. 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/BC6M22432041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa049904c2ebc0c665a2ed5b24fe5644c1329a93027f1b60105e37b40f04865. 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/BCNWM2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7dc9635a188c7513ac217cc8d3ab2410bea84a570bca236e2ca1290f38b7b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BXIV82499831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1918d3488d98299dbd69945e768ea973cf1843c3e72bcd604662149509f4d387. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRSVB2401347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950cc0300940e18c54989c8557c0f2fa2ee226e053a3d9a2a9939ea54cc1f66. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BCNWM2400188.
Mega do Toma Toma x Ela Gosta de Colômbia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65846bfe4a578e51799e057dc4c4d0e719dd146dea221c7c962e66d5ae10a245. 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/BCHFD2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14fd3fca3d066f3dfc216b6a21877cdc9b266cf4b7ce17d0a70b2f2ac762b2d. 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/BX9L12100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455bb02fde89f9dfa21db41898420b1ceb918c3ea3fd53d88f17b5c0f30b9c88. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BCNWM2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f736ab9d23c9054480d2d3024b4690f8d46b9bce40e244a84ddf356aabeac. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BX9L12100198.