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 0x2c5dfe6831381f27795606978e007f2a193cf7b999c2f4af91d5289dd30a9907. 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/db3f0feb-488a-4ecb-ab6b-fc299de680eb.json and https://artists.proofprofile.net/proofs/artist/db3f0feb-488a-4ecb-ab6b-fc299de680eb.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 0xddf5fce58b6e01a2ea61aff37977fc3d034c014855469340851e8a41c8226720. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ5AB2435608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0e666e87a720cc774229a7f7f0ffbf1cacee043289d39f465b44d2d0ef0b92. 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/QZ5AB2435609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31d30a0a37bc1ba49865c94657ca45f106ca11e83654b84e4d20a1150ae223. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:12Z), 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/QZ5AB2435610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c0aa8b507ca2ecb8397956e3113ea0e6572593d6870411a671f187b779ca4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G1865218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc8070469c4df5436e7ae318f282139150a16e8751e720599db9b490d7d8fc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G1865219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5142f5c56aa047725a62eb33c645698c97c6b13e870bd2902bcb2e51b2d2a793. 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/ES71G1865260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a2f975543f9eccf5703b3eb39abcf26f29f27fa7f78f29b5e662717248b58c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES71G1865261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507ebc9c2dea776e1c39b781b231372d0076a8fcae1ae597a48e9f70b6bdb023. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:12Z), 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/ES71G1865262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd30c4afa02a748cd207774b36a95aca16bd99ac0eeff2635eb6e7870e7472c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:31Z), 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/ES71G1865263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af67b3abe28c596ccf38ebeac84837d3fab6dd086b0d0fa0adee59afcb968e1. 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/ES71G1865264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b97347ad409077379ae1afe30476ca7750b5fd4ed43d5003cea484ce0a6dd. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/ES71G1865265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe728d3de87f0d0c163f7ae00a50dacd5ffbe7c1c140ae83becba196ff9fa5f6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G1865267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f6c8e307099850907cdfe45e9a146837325cbfc5960e525b22bd7ae80e6091. 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/ES71G1865268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bd88f0e21d1c237d3b100562ec9d4e543e07e9565801e2f44019601d8b5f3c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G1865270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76be067bf5504081a2ba7092881f3cb9cf092400cf0eb08ee60eddccae7858. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ES71G1865275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8457da335abccccbb1d388f7796362ad9663553df98838c085f08c2329149826. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:00Z), 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/ES71G1865276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a445aab04dcadfeb007186982d6cc62b09a18a0ea090ea350653071a6cbe69c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:08Z), 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/ES71G1865277.