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 0xbbf17d9c166d16f4eb265756e0062d64b7e9774a7d016fbe6ccd5e5c79ddf3db. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a34634f8-baef-47da-87b2-42334219726d.json and https://artists.proofprofile.net/proofs/artist/a34634f8-baef-47da-87b2-42334219726d.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 0xcb893b75005f0dae538e394c9dcbe96c7e7fab4f86a972f659867432b0e54f62. 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/US25L0902306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5e7a000fb7989ce713546239e3f1a11c608559a8d45a574c9ddc5b0afa142. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:54:34Z), 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/US25L0801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefb755a6e81c9513eede947d01c6185246a6da7a59d5da58ed316591ecd66b2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/US25L0801133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa3bfdec9f256aa9610b8da9f01115a118770a451e115471bfed4b8e914f01. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:22Z), 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/US25L0801079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906a0b70e1be40f7edd3bcd5d46fb1d47677a339c3fedb259e3617d032714bba. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US25L0902307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c03a360cfb98d14ad78a435dd83b693a53e0f29be73675c886ccb018ad3f416. 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/US25L0902308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b63614208b6b785594d46875a25f1e1a6c1d40c01eb0233bf7ca13df4568c7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US25L0801123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9c9a39207f6426c7b3823923d85cd614c7643749de0db17488d440d2f75b1. 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/US25L0902310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0aac47d210c9eec9667b1bcf87f5bfce8294a0be0d888364cad88fb4edc6bd. 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/US25L0902311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770b7357c09d06916d0c7189e1c974ac2d0d6d8c3010c2c0b6e20224bd188d7d. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:02:02Z), 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/US25L0801097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4022624d01aa100fb4a6f655facb081e415f33f12e8361528c4c54a0d435bae. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/US25L0902312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44969de3250bddd1d316040d5f81b9cf7e82fbee3331a7e0f55c206a9017540e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/US25L0902313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75f6b37117e48dc95330b07bd13661b5a2fcc2306a4491a3f9cac88d7afc18. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:25:35Z), 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/US25L0801134.