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 0x433f4d138f1239fff59275dbdf1228f3aae7bfa8481ab0852998527286109e93. 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/70bd8ba6-d33c-4a5b-a9ad-2e7df13fffc5.json and https://artists.proofprofile.net/proofs/artist/70bd8ba6-d33c-4a5b-a9ad-2e7df13fffc5.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 0x1071fa24066014f19f07ee96841441a2ddcaf6231f9a8fe198a1f865d57e7282. 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/BKLZF2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec4d250101e67a9a6ebbb9193d5703fde4c27952dd44816ac6597c2a2f6731. 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/QZS652283674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796eb0622527a667d74ffd20ca8c9f30e20b8581ff9e39b2a8c445ac88cc43ce. 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/BKLZF2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c8d21536b9dbe5024ff4731cad87d0b198c0ad8cfe31f6bdd16aff1f84f56a. 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/BKLZF2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa958df0e9301954ae8c48e1ea0b1c2b1e9a27ab335574cb016c01bac6aa05675. 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/BKLZF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2c72b8f14b46afe73129e10d7b0ffdf8aca4b9ffcaf2424f9f0bc3e0579f1. 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/BKLZF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1520b3dfeed4d7837e231a0c2c40a25992bf0f58a0dbe7aeb7bc30108b8d6. 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/BKLZF2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66a914cda4292c7877d57aed93937951b8b07d70775d1c4518b3206ac614d48. 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/BKLZF2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c8d21536b9dbe5024ff4731cad87d0b198c0ad8cfe31f6bdd16aff1f84f56a. 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/BKLZF2300003.
BONECAS ABUSADAS, PT. 1 - FKOFF1963 ft KATY DA VOZ E AS ABUSADAS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345c17a85f6c5da6ab1439a9b370538fd1144de3a1dfd0c5592ac919bef294c5. 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/BXU4Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a85cfcc9699602c11368790aaab587087d5ee90cbc472303e0990237e4405. 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/BKLZF2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734509bf3908de2b78ef918b436de33ac8560eadfc7b81eaa974248d59b7f9f. 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/BKLZF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c231c18b8405617e7d56680edf9807443f22e152db9a109561cbda9594025. 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/QZW9M2304529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d55f6e4c05bc12c4b86f18485216135411ef3aab38eb135858392efc447245. 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/BKLZF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2615ad271146afc514005a51e058d089ba2ddb97bc2bc8c66ae9b6a3d7549d7. 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/BKLZF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11d78fa715dd4bc7c69daee19a275e84281b83d8cb8261bfec6921994a54b2a. 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/BKLZF2400003.