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 0x8ec56f52075fca736f77308955ef1a84bf7c89da84f074b776fba91aaf4d91f2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7aa7e5b-cf79-48c5-b136-67e7b4e81ca3.json and https://artists.proofprofile.net/proofs/artist/e7aa7e5b-cf79-48c5-b136-67e7b4e81ca3.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 0xaa1e9485ee75d8d62bd61c42ece8c4d6b6e4975a1ca3804595a0a5bd7519ede4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21924685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47be281eb71e097d6204d9ded486b2ce7003d6b1112d8d99a761878d4b6c62. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZ5AB2314897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328bb4d1accac5b0c065bb0f87c802db229bef748c11546b63492db030db94d5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGLS2315069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148c62835deba340b2a401cdcafbfaba06cbd08a96c5335b4d6c3603be4b543. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2419787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488f2d8fc8ba691553a42d4b623e1989d7dc2a17210d8958ca71cb1d423fb48. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N22416402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb7efbc08d6dc50f79cd75cfc7113d3f5f26991cc9e555a136b851b184e8e3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMDA72440022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148c62835deba340b2a401cdcafbfaba06cbd08a96c5335b4d6c3603be4b543. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TX2419787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82476a2ff5f69f15f5afe4e9721c9eef7045a01ff26b488dc47566457d56020. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QMBZ92520940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7ae0b54b4bb8a04122b6c4a7141fe5c57bde949ed663f437fb3a7983bfb4a8. 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/QMDA72574652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f46dca14827903c0c60ae42f40b63bbef0ff1177cd73dc4ff44709ae162bc51. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFMF2520243.
Jesús está vivo (Rock) - En vivo desde Buenos Aires
30 aniversario (En vivo desde Buenos Aires)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1681ac4cf653b374e5c4b5bbc543e1e7d1b02c0a2e8eb3e67e3539e0f72e35cf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2459534.
Amor de locos - En vivo desde Buenos Aires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaadc2ba34cb307af5977fd2d1c2b676de365bb2e05d541b88c9db1c33a2dbd. 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/QMFME2352178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaadc2ba34cb307af5977fd2d1c2b676de365bb2e05d541b88c9db1c33a2dbd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFME2352178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ac061ab150a2eb30fc7f6902e2494c011c97948d36a19be044922278886de. 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/QZNJX2360805.