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 0xf09a718015a5e8b60a130d6745a764b3c5089f15aa3440905e4690fec2b72b50. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97e6f44b-450f-4dec-ae09-a356c3843ed5.json and https://artists.proofprofile.net/proofs/artist/97e6f44b-450f-4dec-ae09-a356c3843ed5.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 0xc55be0a68aa4104e825bb1e983630a7144be22b8ea99495bbaa6161605130caf. 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/QZNJV2406234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21862c882d0cbaeb790b8b012d95e07d2504639032ecd1aeabba00328686d9ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:37:31Z), 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/QZNJV2406235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77a144ebae43faffc96c9a29a722dab2d041501bc4af233481ffe496ddd75de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:40Z), 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/QZNJV2406236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8775243edcba9bb236e5151097ef392386f4b78c116f21603d8eac8f368d25a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJV2406237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d92f5613d2c42f5bbdfd576985fca5d219137915193fa983006a3764ed614a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:06:15Z), 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/QZNJV2406238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e052df75ef9a47bb62d81092bfd9c105dbaa2d5cfe17259df0efdb9c74a9b5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZNJV2406239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee18ac3ad7a31194d620f7c2cae57aa1fe0f693a23e0600713ee92e5594046a. 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/QZNJV2406242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9a37ea2226ce454fca2a469bf2de53df1fd3fb8b3f935d74a8a16a98a9b34. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:10Z), 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/QZNJV2406243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917fabe5ffe52206b350db1174d5baef5f18a49751dad239936b4f1775bff025. 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/QZNJV2406244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df35e2b93aabd10a5f4fe128326e4a3caebae9368d43a39790853a4a0adadb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJV2406246.