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 0xd24c6abccb0a7c0550f46c90feaedb7fd9f6b7b7cf1e3c7f6dd8910d501724fa. 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/7facbc81-d61c-4c29-b097-704fa0879c72.json and https://artists.proofprofile.net/proofs/artist/7facbc81-d61c-4c29-b097-704fa0879c72.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 0x468974556e95facee14ae3d1a82ac20e01a98dbf8361fcf17c45fed0ee0876fc. 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/GTA021500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b39104cc84706d285ae65bdaa57b81b815b202e0f4b14f82bc14f5f9c549270. 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/GTA021500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe6d222e8c77f1d5d61be7090477ad95b8f740bc371a242f003361dfc8b5c93. 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/GTA021500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10d65c340e7bc54e415cb6890ccc53870b991d0c9e6960b9b1af044d42cc546. 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/GTA021500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed4fef11f07e92070cd64970caf4cf48add02471fdb84c6b8748382ebe64c23. 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/GTA021500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4519a77abd3036b1c22facb9f70c8502e4e4040dcedbeab568fc333137fa06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GTA021500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785d0ff369dceee4384266584b76ecdb574b51335e00f6fff320e97f754d7ec7. 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/GTA021500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332277c8636bdcfc93a4816e502540ce6b39279ad7ac065930d3d8b862e115d2. 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/GTA021500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf91c8242567d4c6109c72266236f4cd09869a7a6caab80b80d563f434fc80e. 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/GTA021500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7dc5c72d0fe749f18ec29d6ed82144c93f1d29c5172242724bab138462c518. 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/GTA021500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207976689b13409b797692536a8218a96e1d3f1694078ca3bee3ed3a44a23921. 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/GTA021500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039be1564c0b9598bf809056fd3110793d38f438b00265192d8901a1084d81c. 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/GTA021500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e6455b76cfc148ed9a7c5a0b35337cedf97cac0abf691d85299089a24807c3. 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/GTA021500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ecfa96ecdee4dfe14421a9c3332cfe55063a61901f0d977289e3a3292b77e. 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/GTA021500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb663704c2932c632a63998048f76af1ed57f31df465558242c4d3faf95b687. 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/QZAYX1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb342e862f36753b18a6bce37e867595bbc928b3ef00b51569d2e7672ef3a1d0. 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/QZAYX1700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6350b399ad99b9bb2d8e91bee698d31b69b2c3d18a1717b5c59ccc249048d4e. 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/QZAYX1700075.
Retiro De Mujeres: En Espíritu Y En Verdad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4719834b406f933212df27bc26664549e63a1ed51d075cbb60b1d25d009723d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARRDV1101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1188e5d09493d24dc14ddde0bebdd5da215b1375afccd8a475b7cdecd92dce14. 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/ARRDV1101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa1594add97a256305af8d8cc31b194f17d300031ec362c9734c3d34dee965. 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/USMN21300021.