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 0xfa84df81817e97861443523fe8d76f48faeb79f5c1c6c75c69d43331e215999f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e254ce32-0347-41dd-99a2-039b8e8d3f54.json and https://artists.proofprofile.net/proofs/artist/e254ce32-0347-41dd-99a2-039b8e8d3f54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don't Look Back, That's Not Where You're Going
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 0x9bd7ad5b0ee2f77c6ffe8eccc6c7699006788b17b99f9a16e2e6f0f1ac045ba6. 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/GBGCA1300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda903a2c060826395a4af223e9f50d8a081e008ef4955c08d0798a7bd710b282. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:57Z), 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/GBGCA1300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405e360b0573f36d18e57110133a291e50d16d52668fae0145bd36710ebe0517. 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/NLM971400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08056c1680037c5b91503f6a1d0f4608f6cbd3f36b59b2b520ff6b65dbe897be. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NLM971400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4e68ae7fe388a9342b61e44bd9bba395d41b7377dea2130380c92badec95b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:01Z), 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/NLM971400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41b0e86ee40b7de2be5a8f4c72a163b84280651eeefa7fac5e772eb5fc2a609. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLM971400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccf31a8fd88f5085ac4c52724ed21c1831704c7e53438f0df0f9545d5ad7da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLM971400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e7d5ed1e15dbd49137c37140ec5a32ea648229b3ca639b3d03a00e88cc1e17. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:19:25Z), 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/NLM971400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6625ca9684bdf3197dca39158250452dc3648990ea7c04b51707b9653fc6a386. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCFB1402506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae0a00bdae00fc75eab8f4d07d32b80edbd4e5e06be48af2d849d15e447c169. 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/GBLZC1400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503f06e5861398cdbd7b0ec7d3d7d0e1959e825260e43aa5164ca27a698f1776. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBQGW1500086.
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 0x353b844456d97d39af4835fa6b061b1042bcbe74b6dc35b893e32e2cdf17b26a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBLZC1400050.