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 0x6a47ef6479847af6d61afe33a1ff08dcdba042a49966f5e16594d93e3da58b5c. 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/ea1b2ff0-7d26-467f-aa90-e27e0dfe76be.json and https://artists.proofprofile.net/proofs/artist/ea1b2ff0-7d26-467f-aa90-e27e0dfe76be.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 0xafa6e638468d3a6652f7590b4be9530e7310aa578bfebf476199de6f0807a8aa. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/INN632200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe0d0615c1831f0c7e1054ef9dc795e00d46255e312a6376ed3d077eab06b1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/INN632200908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d1d01d33713f732716a71be69fc960a12bff750794c6fefc4de00e0352b069. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INN632201136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931904c1855cd2ecd1080ef9e936daed4ee762e0934f888e644e77eca65ed198. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/INN632300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ecc840a54543daab5a106c2cfea12983d648e35e4c193f952bc4ea2e43537. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INN632300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bed828aaf3b5bd88c0bd43885d50b4330c96553f16e67ab5a0fe1b6db7f53e. 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/INN632400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc908b96a6745c44b0cc571b638b857d8773791d92792dd1ee7d2d093ae9f20d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INN632401036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1de91e3ac2d214b61bf5bc337de15686f30efa37dce3cdea52f5a75d68a3aa. 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/INN632401168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adb31b65e0fd0a9a1513b06e644f71d57d789a190a73d50d78569321c35d07a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:25:31Z), 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/INN632401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95b86114d5c6871ce0526eff7903145be0516ea6cce2c6be1a32726f98d4ee. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/INN632401259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8cd818078c1aafcf1fe4efb9fa1d300d407fc84f94d4b6ba739930e430c10c. 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/INN632500012.