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 0xa63d18843d2484fc41931c297efa5c1ada06ca5c5edd6d030623f5d751028086. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d66b9e-1e65-4665-a14c-6ae22eee9a38.json and https://artists.proofprofile.net/proofs/artist/a4d66b9e-1e65-4665-a14c-6ae22eee9a38.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 0x4ab8b0fd748615d93bdff71dd9baa0c8d5d5243f9f408c613b899f6a58709162. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CNA231501432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1b166f1286cbc6aea2f0a28ab99b3170ec5bf9e8467e4c917a3932026db99. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CNA231501428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235404f1d0c2a407a629607fa284c88296df57751cdcbe67faa06594821c913. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CNA231501435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4466c2c831cb1e7ae841a9752c11a4a0f92890cfd77d06edb544d066df2812. 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/CNA231501437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f702bfbe46c4a601d3a10ded05fd58006cd4417d58c52f9014fc411acbe6d14. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CNA231501427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d391a3d0e4754a9334800c59cb528123460a2dd9f449fb516159efdd922776f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:25:59Z), 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/CNA231501429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb752191eefcced554695c0c8510eff958187b10196d1b726628fe136fb8e398. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CNA231501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d0db2913e891511ce540e758193b097562709d9b1e80daf8a40331693b810. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:11Z), 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/CNA231501436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097e739afe03cc4072d917f19eb792721de0284fe8156f35752ccdcd2e58dabe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CNZ681800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097e739afe03cc4072d917f19eb792721de0284fe8156f35752ccdcd2e58dabe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CNZ681800175.