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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5547c9205015de83986558b3cd2708ca2c69f75621e87882c8641b7af29740. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e51bbee-6bb2-42a1-acb2-3c8beae58f1c.json and https://artists.proofprofile.net/proofs/artist/5e51bbee-6bb2-42a1-acb2-3c8beae58f1c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d1c3ae6a8b180458f50964184919b626372bdb3797f79a0ce0270d741a7b60. 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/PL88H2100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25121425d74b29a9a4619d67917017335570a513047d17bce52965ade3998abd. 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/PL88H2100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f2bbbb9c50347db3367c3792fe14ffdfabab9ca65abad9aa2eac765f7db8c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PL88H2100603.
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 0x858f34c37adb8b8054b12c9241401eb6a33e714fa1bbb051b0132b4707077f34. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PL88H2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd8506e99bf2a473512a539051ad6171188c325d842d0a4774e9674a13edb8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PL88H2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d33aa3c5d711153d8c6d0fefe1ba2a853bb2e21aaad3c2294321e902c09bfd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL88H2100606.
PDG RAPERTUAR (20TH ANNIVERSARY EDITION)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e06b42a1044b9e24d3ea21d44a45f2a85e7fbfa4bc9bf6d56bb374b53015ba1. 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/PLC062412330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b442b61da7910dd4fef8c79eff9b9ebfefd4f2fad7b018922bc6232516c51. 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/PLC062412332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b16b6e6ec4fb89e25cfddaddc8f3c4103e58cc2d414475d1aeab19b146796a. 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/PLC062412333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1206bc3a138a5b2bc5cddea7f222ba2e6c2917df5a7c22dbc4685155b4bccb. 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/PLC062412335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55d3ef4735808ee3b811a3bb7d1aba7b0b0c2c8fdc297318065de0f3977b79c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062412345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3f99fe83a066ff76a82d78afa50f194e953819e04aaefb5cfbaf44792f90ea. 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/PLC062412348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb12825728e0ab2ec6ba358608ef733f56a94a514d80f7094ae03f28bb1d879. 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/PLC062412352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92db4e5836265430251a1ed1d69e8e585b1536ba3e4fbb3ebb3c4593ab1c128. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:35:17Z), 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/PLC062412331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf083ed234d7eeeb35920b7e5a59b2cc282ba46a687311b4f0eefc8583dba5d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/PLC062412346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d16a82244116c16162de9f3b7d0702d17d870477d0bf39ceeeef63eaaad5e4a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLC062412347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e27c643970086a26bb5f3668371f93fd3b91e1e247432a8348669b18bb8f25. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PLC062412349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb756c61ad37ae370b207f2b3241dabf114d4c3a3901173aca4c520a242868421. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC062412350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b49711cddf4457398fb210bac545112d5fb32f20c65215dbd85282956da0c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLC062412351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138c4955020bfb06aacb6d23ffc4f2bd958837c0cb2b8bff8ba7237edf5d6957. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLC062412353.