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 0xba8fc8b1f39c66cda7323ecf8633c1996539fe35ce70484ceee12574d649a68e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4690ab71-6a21-4434-abe5-b67cc6434fb6.json and https://artists.proofprofile.net/proofs/artist/4690ab71-6a21-4434-abe5-b67cc6434fb6.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 0xc1734349544beab349d23c3f798296c2127da4e8f577ba091d80a243d65e529e. 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/FR10S1825871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b825cd4ac55915a131573a216bc4bf309fd6e784a595302992a42b172b183e1. 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/FR96X1822613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad90bb5d2e420f449a137a5b346f5886ed4a3cd9da8c4db8865ddbd7c8db174. 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/FRX201824488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bcd32c53908b04cb2347006853618843784b5ca210f144f4d929dc28ed4d44. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FRX201824492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6da1faeaae8916b3c134534235e934c878eb75fd193ca4346c00c990282cb9. 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/FR96X1909198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabab74a9955be44515325a336f15824fcbbeca62f5f70db43527ce96c59b8f9f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X42108026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e831cdb8a347aa9e1105d56c152025b1d69c120c1ad1f5d0c144b7beb38fe28. 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/FR96X2183958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73d56736dce40f63c75ee53ba5bd4df0483f43f22946dc98689ac07bc812274. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDUM72100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f19db0b50eb79da0b74eb1f393f5db51f04cd2626fc9b3c8d31f838bb1d81. 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/IDAA22400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c7b43c2acb6f9cc1f5fa755bbd7c76fafcb83325fadab839bbf32ef5db9e8. 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/IDAA22400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e80e4112c295454d65e389710a1357e97cf83410ea2fb06dd6daff64252da65. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0H2494122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d421e59f3a774dfd4bbaf31760c5ad1efcdf4863518c9cfe30777a5fec5c8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DGA0S2400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37cfd6e43a0dfcd5d880f3ec6dc586e59a0a438d0b21435c548aa9bfdcedb6b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DGA052557120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9b83ef86286c1fb8602b8a6cdfff1250ac54d1e53e3011fa7cf8dfd9443ac. 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/FR10S1742236.