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 0xdce654cee56b416ddb05e815f8ea37dcb07f14dc54911a6be85426394227b134. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7210dfd-772e-4d26-8389-43a8e380778e.json and https://artists.proofprofile.net/proofs/artist/b7210dfd-772e-4d26-8389-43a8e380778e.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 0x172f0cc60d22136c9bce0f2f1c3ab2d88343b47447398aaa3f2aaae086479464. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:23:37Z), 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/QZARB1863585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df9be61cf00a3f06f60aabc71c1f5bda439c0b19437a17d89fe5c06c79068b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:24Z), 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/QZES51860757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce5db054518ec02acd3a0aab21a09f24828f0defc68e3b233ab93412696f0ad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:58Z), 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/QZES51860758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95719abd85afedb1e736505a2534307f55418719f6cd4b146a957d896ca9d821. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA41991280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4b87204c5aca529f345816239dade7c027a75be16cd67e256222dacf2d95ad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN62029093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd933edd8a7b8fb010917ed0073bf572e042feee8838147a35f1868130319b75. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:36Z), 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/QZK6N2235415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee245630ce03334cafbde798acac5b4b83220aeccba67cc1ec6974b86706e2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFQ2316100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd58c20d7328ef38b9458ddb2b723b718ccce22c5899c4632294d1341dda1b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHNA2546649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1619da88839ee367168722290f3e79a02f7e7dcef70858679f3fd9e4faff4. 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/QZTAY2524006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9154fcae8b84e17c3e849250a5922dd5916fa0e905fe2a101c4e10d856b715. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7T2562151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee245630ce03334cafbde798acac5b4b83220aeccba67cc1ec6974b86706e2. 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/QZWFQ2316100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27056a55ecb4d6e5cb841b26c64a572afa672e6807e2d7405d6a53d625a5ae13. 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/QZZ7T2562152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92069c4eb1b807ebee043376bc21094272c93b554a9a6833d42d6c5adafbfa93. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7T2562153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f72ffbb9c93f8811f413fb48e91b9fbac1188c6e38af9b8af8fa1a3b89a1970. 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/QZZ7T2562154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7675c6ee8a63869aa93ef0cb1cedb5e294033b2855ef31454bba9a66c143315f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7T2562155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2691dccdc6660582ec956bcf05e02f2c2af8042179f5a72c0952287266cd6e. 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/QZZ7T2562156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ac4221800449f46a28cb52887b1155e80b93aaf4acfb507c00bdbc30e84a1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:17Z), 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/QZWFE2573324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee0f54922227cadea824a110301513f23c1631e2f40c82ea515342d6bfba807. 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/QZZ7T2562157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4aae4bbb7837a07eb4f80bdb9ddbd50a1fc8ff43be412cd4f4934e54b730e. 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/QZZ7T2562158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2d3138e34d110da7c089d3aff43a641f9ccbfa0030d494800981f66e42d7ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2506831.