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 0x73e89d1df38c3649f0b0c20105ca6fe45f9bfa0e10844434271609c442e36638. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8697412b-d6e5-4167-8c2c-6e16d7f53641.json and https://artists.proofprofile.net/proofs/artist/8697412b-d6e5-4167-8c2c-6e16d7f53641.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cláirseach Na Héireann - the Harp of Ireland
How Sweet The Moonlight [The Merchant of Venice]
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 0x8e4aacc19ebcf0ccc3c2250eda40842a75ebd75319d047ee48f78c4015b02694. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBBA0441370.
With Wand'ring Steps [The Merchant of Venice] - (From "The Merchant Of Venice")
Sounds Of The Silver Screen: Classical Music At The Movies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c29f3137f28a44cc81aa4f6c9c33dba9eb6115de5d92c23ad8d79b896f9d0cb. 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/GBBBA0441310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4aacc19ebcf0ccc3c2250eda40842a75ebd75319d047ee48f78c4015b02694. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0441370.
Codladh an Óigfhir (Transcr. for Violin and Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125045858bb80ded17d37435f64f791fb4143f8d2d7392466adbf7c4cc266a14. 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/DEN962431402.
With Wand'ring Steps [The Merchant of Venice]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c29f3137f28a44cc81aa4f6c9c33dba9eb6115de5d92c23ad8d79b896f9d0cb. 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/GBBBA0441310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4aacc19ebcf0ccc3c2250eda40842a75ebd75319d047ee48f78c4015b02694. 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/GBBBA0441370.
The Feast (Propinan de Melyor) [The Merchant of Venice]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff1fcd225ede4d3c208e1bfa3dd267a55b1f9a4a72a3ff4482169228f49759. 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/GBBBA0441390.
Unsuitable Suitors (Folias) [The Merchant of Venice]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54788bdb50ace2661ff2054533595d8f4cfa8757c1fc54fca0655b5148633ab. 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/GBBBA0441470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aaa9125ba75a651c53aacf6d88c9a674480f83973edab9b2a6fda190557c6c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:00Z), 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/GBUM70700423.
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