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 0x4a4d3dc53b62ece2a0c9022b617ac41688d37673066ac5dff467a24e16ef0c9e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/327b76fd-ad39-4a46-864f-5f2d43ff1e71.json and https://artists.proofprofile.net/proofs/artist/327b76fd-ad39-4a46-864f-5f2d43ff1e71.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 0xc16748f03617f81681af555f1ce3fa95da6888be1907873c29591468502f10ea. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES5080600713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69585d2be13658362192642e2682380c03ab63cd37b3b31e2875c5e53f443506. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:30Z), 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/ES5080600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020236c216a4feff78023e17e02f48d3cf6d21e52a90796ba4725643076bb456. 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/ES5080600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d1b8964a85a8ce77b51eb7ededbd16bca1438fbe1a0074dbd42a3a2b5f177d. 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/ES8431007008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6586875f84e512efac50a7f26ee1c4db138c5040a2bdfdc6ff9949238a0bd455. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES8431007001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4655ff430f655cc83b40c8bcc9dfafe37a0296129ad5f41248fcfc1be833574. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES8431007002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc138ff808461a0e19b66b3ff35d619cac51a5d1dd531a5e639da409f93d98ff. 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/ES5151200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68792d3850213ce07a776e90a3276dcb283c80352190d5c95bb9511ee47d95bb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:33Z), 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/ES5151200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca9a4b189fd5f108db3c0b648093abc51c0196976b7b95f8e34566986b5b954. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES5151200932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fa62ad5231d257ed8d905ae6f9ce8b3b3d16421ad83f5692905dd6a3a2df5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ES5151200935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8765597a51718f939fcc5e31f998b59e47cdaf93eb43a50590b1336516e492. 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/ES5151200938.