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 0x556531f33ddd4cb7f57fe34f3157484248fa256a211b09530b4a0093e5137100. 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/adea2c1b-53ca-4c05-8e36-76fb02900b66.json and https://artists.proofprofile.net/proofs/artist/adea2c1b-53ca-4c05-8e36-76fb02900b66.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xb0fd921e3653060389c7451e7d2d0f6474056177cf076153bc0b397544cff642. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210281 — a six-check JSON result.
All Rise: Movement 9: El 'Gran' Baile de la Reina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c49e7c152c9bf7a1f9a95ec9429bc833a1171ed5d9f2b45eae1f407f4c76ebb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210289 — a six-check JSON result.
All Rise: Movement 2: A Hundred and a Hundred, a Hundred and Twelve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e03924c6923c9a6ce8d09f4dd2f5cb99ab04d6b61826df88b7be2cf32bca1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210282 — a six-check JSON result.
All Rise: Movement 3: Go Slow (But Don't Stop)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2059f63e87a65baac592b1283690ca175df9f9995d308521f22c90dcc543e1bb. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210283 — a six-check JSON result.
All Rise: Movement 4: Wild Strumming of Fiddle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6936fedec35962655bd0afed3344e40f3998982f5edf0d93171b8fd9a9e4bcb4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210284 — a six-check JSON result.
All Rise: Movement 12: I Am (Don't You Run From Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b349059c6209f83e51860cbcd1386e6cf0688de9f581fab0e67b6b9139dbfd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210292 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d55336c2c1f22da9f42a981827cde14d375327268d0465f62d7cbffadbefa5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210285 — a six-check JSON result.
All Rise: Movement 6: Cried, Shouted, Then Sung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f672d17534b07f45ecee3fc07f53d0e66ce82871da6d85ae5e7a47771a557ef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210286 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e7b8c2e99c02d14ee26a07c72b46cf0f5af698bc3094d5cfca31b9663535f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10210287 — a six-check JSON result.