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 0xf8777556b84636465c03eae61e82446db9cc1e88362922781598b25209870cf8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e57fdee7-4a28-4b6a-83db-63f8f42f111f.json and https://artists.proofprofile.net/proofs/artist/e57fdee7-4a28-4b6a-83db-63f8f42f111f.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 0x9fc3b22e65593337a3c159b9e24910b8a406214f515de64d6fd7674551e50b54. 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/ES71G2316684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9763ba05b2aa6ed05899a370888e8b559d9711aa38b4b95317d896d0088b72df. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES71G2327304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a852e7adf92ecfbd5809ef52eb29a096a28eb89de58750c54e97f3cc75ffea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2239275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e2ab41d93a8e169a5f35af9cf5320e901c517e00e010cfed2f95aecd1f62ef. 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/ES71G2327313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2370c2d84600c585082af55c1cde0465965d0254a32ffa675d875f177bbe7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1838726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c646b438fb66c446c62dd019e11c2db1e17d956fd245ae13262235acd851e. 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/ES71G1927577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feec39470b7289d03f004bc2d23e83fc4fdc4c1a2c04422ec9ddd5e4b126196. 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/ES71G1927579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc3b22e65593337a3c159b9e24910b8a406214f515de64d6fd7674551e50b54. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G2316684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77730a95fc562af01b60509294499a4f3d314314719e0a37ebb11d323a5f0004. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES71G1866089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2370c2d84600c585082af55c1cde0465965d0254a32ffa675d875f177bbe7. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:10:42Z), 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/ES71G1838726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938a84eac768969a55d754c5c70d7976122264b73f40c6e423786756a10d537c. 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/USHM81671420.