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 0x8dd7f86ff5d871b6d9bbf940f69f95a22058b458851294cf74b3289c42666f3c. 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/e832ae8d-49fc-4148-b181-b83025164caa.json and https://artists.proofprofile.net/proofs/artist/e832ae8d-49fc-4148-b181-b83025164caa.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 0xd864633bb2ad7767830fd4d81fe0acf90aa583cfeaa4c408a3488f67ce347125. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CA5KR1960476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740724214cd742d11cbca154159080ea0c003310c2615f0ce4ebdf723b5a423. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:45Z), 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/CA5KR1960483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abd8036e7e89dd07ad7172db60723e8eb9a325f04369bbddc49ea6b04514a10. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2064431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52cd50c574f060f8a4f4f82903fc113e813f28ddba43cb4234281718be19390. 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/CA5KR2064433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9d13b4ebae6acaa96237bd4fa1feb457772b644d1a88248327aeb19615b9d2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:10:24Z), 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/CA5KR2064439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c09844bf6f4b6663de2053d941697f83361c270922b2dc4015d29dc2c324576. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CA5KR2064441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fec34f16077a34f7e54a17a568cbcb304674ac5771f15480fcff893a55d4d7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:51:17Z), 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/CA5KR2064392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa369b0bd998fc04f6779b858b1c0ac7aa86ac234c14e31c7dff6df91541f7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2064396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f01bc187306fcdf359729396f1db5fe1fd42fe511b52bbe83ae7d34cb20c9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:13Z), 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/CA5KR2064397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca49711d1fa0fbf249fbb5cdfc5f67d2f68311e3b666ab5691bd6a98df35fb5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:58Z), 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/CA5KR2064399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba669b3a7f7e6a39daaaf9d932c55399dd8ab1026d3bf136ad6ca84c1e08d7ce. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:31Z), 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/CA5KR2064402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30411c649c25cf1f8577625b253ece010941fad7fcc63dd89d6f22f334cd6f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXA3V2412620.