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 0x33773626b9329c9a1bcd50c75be6eff8da13ab52c23f158d666f36ea9ade41d9. 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/8300c448-4425-4471-a220-f68761251e97.json and https://artists.proofprofile.net/proofs/artist/8300c448-4425-4471-a220-f68761251e97.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 0xe408861bd1e12cd03211777ce0e80707e1925d6317e33f7b16dd56b3af62cf92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOUM71600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ec62aa85cc557382f16f848f67861c1fba54626744bace75ad00ff5340468. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NOUM71600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b177e7b44f635dbf67f7c3f3290f3e085fbb104a664e4c15e46cb7c90fea7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NOUM71602630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ccce32e8c81b88f4eddf06f74569a161d477f79b22bac84d87606dfdd7722. 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/NOUM71700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881994f39ad2d3e969918ea3ec65d6a46034dd946663a78fdc73233e0482c72. 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/NOUM71700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6041b181e6cf2a8486305a103260388f2e63e8ab47d22ac29764cc57f8b77. 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/NOUM71602734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864a02adcb6c9ab01eb36f21fe4a23071b28a57e1ee6e548a9615c08fd7d4092. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOUM71700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5334762d23b8fd26716e309feaa847ce663f23c4a394fbf79dfb2c94e5c8ec6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOUM71700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61396da8ca7778a77c964eb5588100ae48c3c741bd6c60a6eb5d4d8e46096ba0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NOUM71900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283e121537ae0f2f63cc9a5d9761a5bd4cc2876301d410314db1e1cc8a82f9df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOUM72000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6d765c93890dacd85b7593837fbe8084d0b80e23dda956b602dd7bf2ee8435. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NOUM72100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b35d3e63605bcc9b4b66711ef420f390253f733e8d5d86084c8857f5e07856. 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/AUUM71501060.
Coco Beach Ibiza, Vol. 4 (Compiled by Paul Lomax)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b7d4685d70fd34ef0b158698e112b1154a23f10aedec32062ef2a339c62df. 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/GBHAD1400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91a3c4e49207490d99f329daaa5a11f7870532efcc91a51ecdf7935b0a5017. 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/SEUM71402007.