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 0x66946a4c227a1c450268f9d4a05746c6a019b4a4a886c71dc4544aca1e5edaae. 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/d0bf192c-79bb-43e6-a1ee-65db95e46fc3.json and https://artists.proofprofile.net/proofs/artist/d0bf192c-79bb-43e6-a1ee-65db95e46fc3.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 0x39cbb85eacf1d87f610c2a94a7ae18168dea2d651a0a59780aebb5e94d932bb2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USERN1010144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eea43c3c341cd0f69f5a2cf8f8cc365d73a838576b1386bd59c9ef595eb419. 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/TCAHY2499360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3650e61b5d148e6732adad53fd6d0c79ffbd9febd480eb0b21fa034432b6590. 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/TCAHY2499364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d935a1de3b7fda24f656c34b3c8c0c0c84a433bd40b34fd8c550924d8c2cfd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:38:03Z), 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/TCAHY2499385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4608ce65749660efa7f43c9b334971ef71850fd03d7c0cfd1496372203b69dfc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHY2499406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e593008940cb5603fbef6cec8bb89c9fd4691be650d124d36bcf82dee036b0a. 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/UKYUU2504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda0df032813b9d441cedaf01cb6953f3e39a1f9a28aed01973af4996c9ea9b2. 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/UKYUU2504002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e11ce7c2e9146fd862ced9b948d6c854240163ad1f56fef0548ebd6bac56f5. 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/UKYUU2504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc96f0dd6a96b66c4dad98492a2d57cbd3a0d4a05fe1ab7b4b9acb3fe9660900. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKYUU2504004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463f2307799f137b564039aeb9c4a9d80fd651b59624aed3ed54868fd51b28d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKYUU2504005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ec9395823dcb440335464ba2ef6dfe4e75235277bff00d4412f680093d069. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/UKYUU2504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7468e30aedf1a734c6ce1f8b814d79b941aa6de72ba823588a678e242b1b61. 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/UKYUU2504007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679d6a71f3d2b9ea4a92432f288adbf000a9e66d7300a28373d3d6bda4f28d6. 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/UKYUU2504008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdc1971a73bbea0fbb44fb752e635bc55063413d8e4d704cd0da5c51d70b231. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:58:20Z), 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/UKYUU2504009.