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 0xa15b07b65d1baee59bfa2a5eef9fc779da3b2528eea4fad79e7df0d332b0117d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32c8a4c1-6f25-4e66-8058-c8be8aeb71c9.json and https://artists.proofprofile.net/proofs/artist/32c8a4c1-6f25-4e66-8058-c8be8aeb71c9.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 0x261f2e6539c0ce3b9b31e2f438a532fcb2f74f2bf8632d7b2102aaac43316955. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:46Z), 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/QZHN92270908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722b232f8cb9a8298527dec8e1d0528e0a7f2d7def264dd9c266675a0d3093b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:21Z), 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/QZHN92270909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14844767054baa3b5fac01862f5596b9699d3aadcf4271f10b1b79c02eaa136. 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/QZHN92270910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f85af94d944662641ad4fac203539ef6f33ec30e6bc10dbe4b0f0210c2d886. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN92270911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e122b94f481f7ed6866a43ef877f1dfcd3671ee12be51bfce194482753b8ee. 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/QZHN92270912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a906e76916ae6f2aa3aa960cb0827c579f366e64f66eceb2ed0072c613e03dc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN92270913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526c5e5e3a8e9f8c6a6b4a5f4a0b9f9aebf9f14e11d8a58c040ec2353f650b0. 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/QAP6X2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c675752a24bd0ead07355a651a9a951497fbe2e4a4c1448ab2cb2f4c5825720. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNC2540792.