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 0x8864110c7c6da129ca3388adebdede06e0f0ff0c225a6c72a117913d82df94b2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c7511d-a7c2-4c1f-9a65-d314fcfbdfcb.json and https://artists.proofprofile.net/proofs/artist/55c7511d-a7c2-4c1f-9a65-d314fcfbdfcb.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 0x9978ca041a02a60cc03115e7ff734eaa551fa35c775b720c1c7457deec8973cc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBUUN0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc332048ebae64b80a42c7ac5d67dc60ed55f207dfe6aca9a51da5ac20af1fcdc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRU622054003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fd61584feaf49c4bbf7699c5799adf05c2da95da149dd5b1b0eaffeb35d83. 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/FRU622054005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24422b5b65d44e964f97438c7f0f29a12e76c7d7b43d200eedceaff13e2a21d. 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/FRU622054006.
On the massacre of Glencoe, WoO 152 No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b6c02522222f9e84abeae5eae549fe1ae832d39309b232b4726713df06c22a. 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/FRU622054012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c5500bcce9dae79e4292fb521e7a67c6c6cddb02fa8e93d713ba0b8eeff7d8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRU622054001.
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 0x63cd70d7261aae39654e13250bf2bb26dd5c0eb9222fd57e277cdaa8ec722805. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRU622054002.
Since greybeards inform us, WoO 153 No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e973c0befdfc7b108dc62c3cbef6e196344c4a9e786255effbc519667c532f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRU622054007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e3983f626c9cb045b4d15b745ad1243e1cc6e4fa1122b592e5958047829e6f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRU622054008.
By the side of the Shannon, WoO 157 No. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad91347ee63ca54571d209d416c8316f60120041aac4b8555518faf79d851f9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRU622054010.
The Miller o' drone - St. Kilda wedding - Port-a-Beul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d1815dd3466a11ab0d7a1c63e4a945e91e26e5b57d7a980f145c3f16d777d5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRU622054011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8817ae5cfe621e8028d599066f12c6afdcf069db16a5fcb929f209f029c473a3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRU622054013.
Gu ma maith thig an crùn dha Tearlach (Well may Charlie wear the crown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd151f898206de6f7e2c6216a5ae9a1782ccf66cfd5ceb2bf53ce347c41b4aadd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRU622054015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d94c94edd15377de9c58e9bce65c2ab9b734183fb3fddcef2ff0eb3e9ad552. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRU622054017.