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 0xa968317e62aec439f5aa87169b826440461b9b1bc75efb4184a71da8f458fb5a. 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/df52f03d-da9e-4842-a8b4-3362ae351566.json and https://artists.proofprofile.net/proofs/artist/df52f03d-da9e-4842-a8b4-3362ae351566.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bonny Portmore (Arr. for 5-String Electric Violin, Harp & Piano by Paweł Biliński)
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 0x44bc3ceddbce9fd90ef915990d67b2dbbac435c7986800b51a91da85d851bed6. 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/PLA162406601.
Star of the County Down (Arr. for Harp by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab58e61ed37ca8300c0e2bbbc6abb3f25bac4ba40c793e4b99bc933d5872c0c. 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/PLA162406604.
The Skye Boat Song (Arr. for 5-String Electric Violin, Harp, Piano, Whistles, Pipes & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656193693905e29605bf55741387e3737464640498387fff3e2eade9610f8ca0. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/PLA162406605.
The Bonnie Banks of Loch Lomond (Arr. for 5-String Electric Violin, Harp, Piano, Whistles, Pipes & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cebdace2415716a262edafeccfa661d33951fe0002b1bbaa1c0c43c1ec947c. 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/PLA162406607.
The Massacre of Glencoe (Arr. for Harp by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a35fae61dde4321255102daca89b142040645aa9cb78bc08a474ea261bd9fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLA162406608.
Will Ye No Come Back Again "Bonnie Charlie" (Arr. for 5-String Electric Violin, Harp, Piano & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b54c54f1be28b1d1e503ac251f84cd50dd83936c9dd806f3969449e7bfd48c. 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/PLA162406610.
Hi Horo's Na Horo Eile (Arr. for Harp, Piano & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb530aac2e8fad7e713a456cc3e34cdfe804043a4e0385b5d8046352a3c0c6. 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/PLA162406614.
Ghosts of Glencoe (From "The Massacre of Glencoe")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9c7e1b0bc13bb95685ae5ad84dc5e3c024fe8b8041386d6223dc760aaba6bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLA162406615.
Blacksmith (Arr. for Harp, Whistles, Pipes & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b59a8fe63d5e23d311c6c842cbc2c5041db38245237d353a1acef65033be28. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLA162406602.
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
She Moved Through the Fair (Arr. for Harp, Piano, Whistles, Pipes & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bea640a3901ec2f4bd0d7a115e64f7482d32f1309e1d9c4fad04dda2b6773c1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PLA162406603.
Dèan Cadalan Sàmhach (Arr. for Harp & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ab3599ccade8922ba66871ed1f718475f2284c88e4459d19c440a414f6ad18. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/PLA162406606.
Arran Boat Song (Arr. for Harp, Piano & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd28a5d86b5aa14260c93ad1c541b3f2ecd1ce766734faf1d95f0ac5f52c24. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/PLA162406609.
Sealg A's Sugradh Non Gleann (Arr. for Harp & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1685e1e1db1dd9f128479235890f090097be794278066701c3de46f20afe5df0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLA162406611.
The Parting Glass (Arr. for Harp, Piano, Whistles, Pipes & Percussion by Paweł Biliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c4f102f98430aeb5fe93009cdc18206f6c7fc710ece8dd1be06fbc8109aff. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLA162406612.
Arran Boat Song (Reprise) [Arr. for Harp, Piano, Whistles & Pipes by Paweł Biliński]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4c912848b90e714a44bf4fb6bee723906339aad4382c2488bf68843813b6b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLA162406613.