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 0x8853525fc6c4cfeec8d9cc8b8d5a4bbe39654800c531dce48d9c13b9fef4c50f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f839148f-14e4-4cce-ab5a-55c615fb3a84.json and https://artists.proofprofile.net/proofs/artist/f839148f-14e4-4cce-ab5a-55c615fb3a84.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 0xc42beec31edb4e6b92725eb4170d734999218f38620a6eed5e014566c4957a1e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:07:13Z), 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/QZNWR2128052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad8e79be607055ac5892dde8fe9e00df05518424693058792777593a9ef850. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:25:58Z), 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/QZNWR2128065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2f7baefec85b404e58f7b97dd8b24b037a3d6365cb8b866d12e44c1616c7cf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:02Z), 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/QZNWQ2194932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8be3359a3847fc07df554be42c7f4fefe2787359900436a55a30fdc8ce7cf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWQ2194933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec1e554df37ddee8e9cef08e4792f6c5c96ed8af0538231b55399125c338e6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:33Z), 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/QZNWQ2194934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81967e5fb8adb5b67ad37c0f9b63b3e6e3beb82873d23c25815ec3bcfdeaa6. 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/QZNWQ2194936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f78508765f46ac76b2c25d1584fab5db268897e193959f0181d70d831766e76. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWQ2194937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb312d832088efe997988ca6b64061209a5cef7514d3745435b0571a18813fc01. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:42:31Z), 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/QZNWQ2194938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34917fce858014e6656fc17ebc25978cdbd6825728412581a09f92e2a2ca6e19. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWQ2194940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6d4f38a53e9e3e8755828a273b33d48329270dbe8f3693c1b5f9395f4b7668. 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/QZNWQ2194945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec99b9cac1dd31dc3e4a8cea34c479237f12de615f26ba0ece1cb70cc79352. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWQ2194947.