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 0x18ce4623e5df19517d39ae8aa2371489902b13e4f988924161349da32be4a98c. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c60ac4bb-6c3f-4c09-b970-56688193f79c.json and https://artists.proofprofile.net/proofs/artist/c60ac4bb-6c3f-4c09-b970-56688193f79c.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 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 0x5644457a8995352bc388127c3af7cbbd05c4793e99046a1015fae6cf6fff20de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBEWA1908360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614a0172991eff204d2a62d03af7309068b1e6bbea8fae32fd22f04501cd0db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBEWA1908362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c39d5528b3931c5bdd74a3930d69f0d02a7f4df6a91c51d5116ac56fff86a. 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/US83Z2105862.
Rye & Eggs - Kamilo Sanclemente & Dabeat Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e21c5c86ae1c9a72572a306002065e2e5040baffe1afa29ca23b265f46f43. 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/GBEWA2105510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e629caf5a88e4457af37fc970f210d1cbc02c234b43164145d55d511dec845. 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/GBEWA2105518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39c2a3f0daed718772385d9e87af4a1c69c33cfd10fdd2255d3904914cc563. 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/GBEWA2105511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4644d5c1673ccdcf3e9812ce3c6ac8e1a522d82e2beb5eca00a63adeae2e88bd. 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/GBEWA2105512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f2289d8d3aa9c5a1396cde2327312239bf02b2be9e2c874b9271b5c64a7ba. 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/GBEWA2105513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce56c300f1f67b50426fcd8415520e694c879897cac507341694417d0fb39f6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBEWA2105520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb81246f4b256004efe6d74c72840fb802b94ca84dfc586aa3e95015d362b7. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GBEWA2105521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a529d65200f6bc081a85a2ae57c1b1625cd95aa0ee8f2cf0b920e650b464e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2105514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18587ba156b68d85bb96778b404488f004ac6dd38e856bdb9e48894ac147abb6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/US83Z2354243.
Istoria X Songuara Mixed by Maxxim (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27de61d75e769d472af81c0a19bc9fce0be2e16230d69eee1e10d19d76ea6a. 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/US83Z2235975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f2289d8d3aa9c5a1396cde2327312239bf02b2be9e2c874b9271b5c64a7ba. 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/GBEWA2105513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce56c300f1f67b50426fcd8415520e694c879897cac507341694417d0fb39f6. 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/GBEWA2105520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3f29ffbde2a68a1372b63a6b316a7911b42364dd52733ee93d8d75673aaec. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US83Z2492923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa62ab2ba652593fbff4213e1834abaf374b83d16288200cedcd9dea16e34e50. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKPL2287451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef30805466f83186868b1263626b1511d62139dac2ba83804b32dff1227d849a. 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/US83Z2236729.