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 0x78fbbb4c0e0548779c189e0bbb95dc48953e3dac5ea8392795c6cde7c2d17260. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbaf0eb9-62ef-4b98-8e65-3937ac7fb62f.json and https://artists.proofprofile.net/proofs/artist/cbaf0eb9-62ef-4b98-8e65-3937ac7fb62f.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 0xf0599d7878b66dfc4776b25cb529d0da32ee9a05027b1bd4fca6d37c78d879d2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTB82297827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9304a6f4f744c2034a1b2f243c7037d290603d094765907bc98ff332f19b5a09. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES92359296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab747234809702ed2637316bd36d2643d2e7ef9e07f04b98a195806cb361c88. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:54:12Z), 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/QZHN32336885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178be5268856ca1d5c48696994c96c68dd1ac3d5942b2774a5fbb7fd2cfbe0a3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6K2358203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658be7632220fe90780792af81cc8a2ea91b8fa1d00c7dd3d2d217cc70be3748. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:19Z), 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/QZK6K2317166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b43391bf78b6db30467690f9d11633d61217722c6949ae9b2f6f7c1016b67. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZK6K2317167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cdd2bedbf0e7992f75eba62b7d7e78c6f91a48eb0b28d33feb76c723f17c77. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:55Z), 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/QZK6Q2590838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc9fe221a0a8810b8a162848b8024a58ed06133a316f9e4b1f96fa7770c34d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6K2595655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20398cd6c4a00ceafcc1350089ea915348adc765018ff4d8817eb5e79933abf0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZRP52585265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd61c8f92d5a792916f8be3d5c3badead56c59f653e23b94f06c3e736247272d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:15Z), 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/QZRP52588915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f723bdb1bcd01eab9eccb5fcf2156d7bfd8101489d4e93b079c3e41ca88879. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP52591773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18bca5e2e3bccc2b7d0d1eb843ba4374bb0ee63e05a10e0e84cccb4da92873. 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/QZRP52591795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8aa7f94231759df1079ff1dbd0ce3d573e57e46bf82becbdc8e85a796f6e5d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72552704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d720e0314232918ea306576f0c35405f50d182963a5803d2f8be3f5496a9f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB72552706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ea283b3df772a118996f4222bd5b92450fcbb91a29fdd2e44b7ffae80a3618. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:58Z), 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/QZZ772534382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c2021e106f49df8aad24d17524474fe80051a623a2a140bcb34f0897e5b759. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ772534386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720eef9d165f29510ce682d8962f6582000a2fc2031645c2def4239775e8758. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:52Z), 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/QZZ772534388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939fe03aa50f80ff8330533f4ec4fa1d3bce36a9a808ffdc0aa632fde140a8e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:06:27Z), 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/QZZ772534389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6df6f63e6cf41779193720c0f17f93512a0bda988a34250e786cb3e255cd4ab. 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/QZZ772534450.