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 0x86793aa60bb38e069cc31a20cee3622a047eb543ffc81eb32209c4a1720dc028. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/987654f1-8d48-4ba3-9c57-b2156d87ce4c.json and https://artists.proofprofile.net/proofs/artist/987654f1-8d48-4ba3-9c57-b2156d87ce4c.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 0x5a23fb0c3de4f974d96a18b3684b7b5aea8746042e9d5e5288911c4787a52208. 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/MXF368628645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f120187b11a76ba3e7c6655eaeda2e146d9a4093181a377f4c4e88c70753593. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:39Z), 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/MXF368628642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872fc185202d9d1d35c5d8486111cd2c923cc8a64ab044586716fb91072b8aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MXF368628644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e34267620e69d42db641bfdb435bdcf2b2c22a3dc889147701d2b516072460. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:19:14Z), 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/MXF368628638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1e4701c59c5c9033750a4d84bea84ea7aabd8a0224f5297232f903e38ad468. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXF368930535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab27f30e397e05fd1a0cc1735f16bd98e9f087cdf5a8d0f82210d56b664b47c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/MXF368628834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1e385108af5dc0942930f8b7a0343b3b345a5be3de135d920edc53c68ab12e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF368628636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c957af6c7c3bf7d80abcd612cbef726ea784f20b6b49a6adbba9709cdd7006. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:58Z), 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/MXF368628839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7930f2c6f099ae67d67ee67252ce90f79eace56f6d32e9fbcaae2ce064f284. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/MXF368628830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9c4fd9f7b4c68a476556545a37341bacbe763a12ee7694ed1d837f0ccf5d6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF368829831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d9cd4fa4dbce29dd5a56a9a4847e910d19c763f5c930c3f302909cb13014ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXF368930428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60697dbe30b613cd07eb201430be97623ae846ab79a69b72c9c6f8d1d5006d4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/MXF368829828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66699150ffb0fd2374dbe6fed0a52ea885ed52d5c83105c261bbd1051cb38e71. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/MXF368628840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6abea3f7f155cb9a4b0cd1fda202fcdb0a3722823255a9affe9ee097c766a5. 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/MXF368729317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0315437490a8ce84b89e95c863685a65cc0c426f57b4547b45b0e8b7075861. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:47Z), 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/MXF368628828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ce1fa2f97fc68b6f217edf7d312f0eb1874ad9a3821610b214a80a0811f1cc. 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/MXF368729325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4de1b0ffde2eac170c99e4368601afea62b6ce70228fa9e297446ca94f84bbb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:41Z), 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/ESA012238303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2a5923c3753b8401cf82cd44187ccd4ccb4d23e8cda93c488f76e9de803197. 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/QZNFJ2506148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483fe107f0a488f74fbacf37589cd44cf82e89cc8bd38d7bdd5648ac307c54d9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:18Z), 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/PYC842509510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47513c8ba7bfa756d716a2f1a4c81eaedf290dbed161ae0bd21979c08122fd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PYC842509514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440bc712d93b455cd4c01ea73bfb236e80c78e0f6ca0a7e67e5fbfa4e710c662. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PYC842509517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d96b3970aa9a5a870f9a3dcd34fe08eb2c654360e3058f66db4ec6bac2c4f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PYC842509519.