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 0xa331a86f72a07848eb1663d93b94d0776f486d502e1a3668a14d107627f41f17. 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/31614608-d6e9-4eb5-9e97-c2ed2e98d50c.json and https://artists.proofprofile.net/proofs/artist/31614608-d6e9-4eb5-9e97-c2ed2e98d50c.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 0xd335fbf82ace744d52e0e5a99083db90bec99061fd1870d1a60be32149ac3fcc. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6Q2446583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf40ccc0b27e849ce18e9fe2bb6b531504277cb415f58b3694b83f4372f33a2e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF2507953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbbc3eafac1c2ca3b9ea2b431f8a7275f5f1128f28152b81e5965dcc5d66550. 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/US3DF2538821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c3dfbc383f997de98d4f48169dbbd6413fe4d9621b50095f4955c8b1beb0d. 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/US3DF2538820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba12b86b6b54381d31fcc16e34421db99e0b7579a173d77b0891ae56514bc9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2557307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050a9ad4a61a1fc8fae07cecb5e76ba7d93ae537f303199959225c573635543. 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/AEA3A2191359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3004b492ce7f34eb60cebc57df1909aff17c375ce99876e0c561ae478dd8f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:26Z), 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/AEA3A2136803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b0693617c40ce344e6738e9ebbadd4357b9c19b755ce40c8047d1ad32af8e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT5M22564180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03383c9b970e8cf3ab77cd4ad31db3f5a7179d914b1cf758cfea16555ce59f7. 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/QT5M22537621.