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 0x75c3bf92ee75d1fe149fe1b1b7fbb8390adf04f3b523cb891403d51a715f947b. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef7b8ba-ecae-4426-ab9d-7a88b5ac0d91.json and https://artists.proofprofile.net/proofs/artist/aef7b8ba-ecae-4426-ab9d-7a88b5ac0d91.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 0xeef11b7cdf5fd47043af46a918ad287200cae9dc39ed7c5680d5efeec1f11680. 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/DEU901503398.
Gounod: Mireille, CG8: O légère hirondelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844a1eee1f74689c69841223a31ae8b9987a59db2aef2c80878c98aa832ddc59. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEU901503402.
Granados: Goyescas, H65: Quejas, o la Maja y el Ruiseñor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15baa24d49dee76c3a931744c19c5a6d940a2b0977bee0af09deea8925b78329. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEU901503396.
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
David: La perle du Brésil: Charmant oiseau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb238d85cb7963fa8561bff54dd795ce86336641508e1972415cd847f830fa5. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEU901503399.
Saint-Saëns: Parysatis, R312: Le rossignol et la rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ac76cf14e32f32001a26eb25d3d26f3c4471c01b5fa2c008bef56389f5e7f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEU901503400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b0ef36177e4669fbc1756d2bb9c06fe6d5ca6bc9c436d81011358fb317b82. 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/DEU901503401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b5b6ad734578e42c2d4c6434042f769cee577d140a499e508c2e2c695c1c6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEU901503403.
Braunfels: Die Vögel, Op. 80: Ach, ach, ach! Liebwerte Freunde, gegrüßt!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056e939557f8497b1268ca90150e45376062c1e9bfa7a3a6950a95328aecb7cf. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEU901503404.
Rimsky-Korsakov: 4 Romances, Op. 2: No. 2. The Nightingale Enslaved by the Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7661465ea94bd2fbd713454dfcf0f93c2e604d98ee06b067d89dd6b736684. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEU901503405.
Bishop: The Comedy of Errors: Lo! Hear the Gentle Lark
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1d817686b7c0ae8b6894481a3d224d6727506d92ff7d9d501296ad26e0b875. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEU901503408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784acb93f8e609cb6451bbfea105243531e7251e35f9b99fd8270055166e68f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEU901503409.