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 0x36fe4df1ecebeefb983d6097b9000b2cf1a9a9cebc2e28cb9d41ec92fa97e617. 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/53456720-443a-4c3e-9de4-1cc0c5a7d868.json and https://artists.proofprofile.net/proofs/artist/53456720-443a-4c3e-9de4-1cc0c5a7d868.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 0x78fe4b71f5691def8d43c20285d3a640bddd25f1f3b767eeab5849274ca12faa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN62045915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae7ebe264caa313541ed6104793a389245c7eac6363e43eef57b52c2f21315. 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/QZFYW2036373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21665b37964c64c94492603970dbb276ef9775f3e63b39c61ef2a14282ebe7cd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYW2036374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725b9ccd4d2155c6bb872dcd72e96b99714828cb3633467ce9809cfec474a82e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYW2036376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51959a840d657531958a5ab06f852078c74769b82b7d01807d161a9f6b65567e. 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/QZFYW2036377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf499cffe928279cf10603edeec6e3c98c3478607ccc6e8742ab2fd69366b6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6N2004375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ef692daedc9d2438e895cf11f97a142e9a8d4c914f3cc782a125c0a7d625d2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6G2119038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b308ad997b607c3ff51f236c2e921491e1f142bb7b4c329ef2cd95628f702dd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWQ2111311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80baf0319e8500ecc9cfa3d7bb0214abc3502ee1b01fc03413affa729c521f2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAZ2204454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f8bba3dd0bb86677ff541d8b2a07e7cc7473cfcd8d0fa717255ff5936e8bd6. 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/FRR642201660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc4e980e2bf8be7bd843dcbeffcefaf8a9c73494ccbdf1fd68443deb8cdee53. 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/QZTAT2277976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f8bba3dd0bb86677ff541d8b2a07e7cc7473cfcd8d0fa717255ff5936e8bd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642201660.