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 0xd81f9aa3a365312995a5ce3f6ab03548a39bf90c8a33324c2c734d1fa5c401d3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a442b6f-779b-4dee-a19f-7a0d04c6d693.json and https://artists.proofprofile.net/proofs/artist/9a442b6f-779b-4dee-a19f-7a0d04c6d693.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 0xb4893b4e85b87886fdd793ea32827c6936b7e53ffc9c9204224b12769a29a956. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USGPD0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6525ef9635f91d386165d523094dc911d1d8c50274e6f033b02c2dc8bb5f92d5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:40:06Z), 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/USGPD0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca39647d99704a931f08097767749b4f5a9a52a689873853e254775eb974f6dc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USGPD0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a8b9bd238daf79795d2eb7abc1d6e4c6b5025f761f280c744f0610099898c2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGPD0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca91f1828d8b280fa5e68b07021097cff024eb4bf7dbe1bac21843be5e1eec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USGPD0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5684d2b5197dd83b140443d32e68ab69a97abc03d1a2e0c4b8b1adc2adc715. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USGPD0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94707c40483398c8e1ebcd26d3e300c15e36a64f4ade0b0e658daea5d43b9be4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USGPD0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c20718706b92164330685f84560cf52cb0a75c0210d71ceb1f5a950017c162. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USGPD0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5377779a94b97447dcdda8d10259bf4ddc104e6afc9f63d3eee5408cc621a4a3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USGPD0800013.