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 0x9c25bba02c971535b9ab95bd6593bac930f0c441e27314e7203a270d09909607. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6e79239-335c-4d39-b0b8-efe817071230.json and https://artists.proofprofile.net/proofs/artist/e6e79239-335c-4d39-b0b8-efe817071230.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 0x606a7b94896c7733ff3d26db9248b10a7021cce9b54597e9c92a7b8bfb7350a3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:08:02Z), 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/QZS652146700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c301fd295d3bfd1eb8ec3e4d8646a9b9f7608dfbf674c1b5cf2ff662eb00a39. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:42Z), 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/QZS672166830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a67a34fb922a004d7c3128838d0dd3d3d0d53bbaf5523c1562596426a304c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GBKQU2242181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe26233fb45d5713f55ece3b27b97ba9ee1a3f94b653fd8f34807a7a31f04a6. 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/GBKQU2290095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edbc0bcf59bea08d35aed1068cd9cb55fd1a1610d885eed7fde4578e737430a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB52213723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978b6a4c055f9ec7f87f296d895425b6029c94b476aba3cf85c45c32c83900c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS632363653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27af2e46619182c0e564d484a2313cc98bb9f626f0f15b1d80f6af7de5777f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWW2490751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585a985a03712b251bdc761e54545403bb46092950e17878027527f558d8f02e. 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/QZTB52424881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07245b0ef06cf43564dca748df6788bdb74c308e1071c3a8ffa151f8198e7ec0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:40Z), 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/QZZ762416130.