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 0xf215dfae028dc7b6be6f8c6f39458ebaf29bdf84375c55121062832f5ff2624f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f66efaa4-b0e6-45e7-b8a5-49831c9dc8bc.json and https://artists.proofprofile.net/proofs/artist/f66efaa4-b0e6-45e7-b8a5-49831c9dc8bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song from the Uproar (The Lives and Deaths of Isabelle Eberhardt)
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 0xb240e635223422d69f36e1e60ded0a01cca6fad5169d48d0b7f8c2b569527d31. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US7MN1200400.
Song from the Uproar: This world within me Is too small
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b99e9475fd9d8cfc84604eb20dcb319ccec9741a17d9a857363d9672758ef. 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/US7MN1200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74a5884b1c5c7f604df8d14d467ab22a62bede9c9013bf5697fc3fb510cf88. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7MN1200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4a488fa55005e9c0ee8bbc3e2ea9a595bb55e1e00a662f7bc698857123a387. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US7MN1200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a1ac3bf162e62ac35ed16d6a34a5679ffe3263387e5b0fce4dd6ae721af8f. 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/US7MN1200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8f3318e473a707b1afbc173ae90a0b9b62fe8d97e7cb18836f75198cdb776. 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/US7MN1200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f4d829f91492d0c759f6f5edb28208de9663ce976c0b45fbaf08b9be535f0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US7MN1200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62acba1e19fda9c4efd466059f5545226dd97cb029bb2eb7be40ac12d1c3b3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US7MN1200407.
Song from the Uproar: Barrel at the breast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe9910a194e36c334d13308241e97ad405c7aaf30d4e68069a112551290b06. 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/US7MN1200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc509bf67da681e18689e7e3c810dbbf4339717cd63c1efbaf2b8e1e0c07d331f. 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/US7MN1200409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b5b63677aeee5bb70ba3897cae52d34e1b1e8b3ee1571be40e274660dd2c3. 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/US7MN1100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2189b9e484e27ffd46527aaf155c597cdd7bf1af8c16e9f7525b2b12e3396178. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7MN1500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0fa717fbb1329d1ca402b7a550f7886bca2953abd6e7db449c5a3b03fc5791. 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/US7MN0800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a63446972094320f28daae1f331e64a8e2f744011cd48a6a7c68b1e27ebbad. 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/US7MN0800026.