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 0xd8b993f1ac2e671db74023af34d7adb69e26d8b6ab8e8877595815b879784e89. 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/f8938b13-0669-4a80-8ddf-16128f1b5cc6.json and https://artists.proofprofile.net/proofs/artist/f8938b13-0669-4a80-8ddf-16128f1b5cc6.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 0x5a18d5bfb35f8e183eef28b016e2a4ff73215239e8fa55582be3e2dc274d9564. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542357730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b23ddc7e4ced6f2bb61316d251ab170b724c63bbfc34fda9732c087b43dcb0. 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/CH6542368909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194d624542b3be6f37c24b6e7866cc93830aa610606eaafcd029f2e34d79f771. 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/CH6542388629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f427de07967875c51cce71a4c47e522d3b7925626c16918216ae6264d9b0821. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH6542412591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ccef3949b6c7d2e6904af09b1e65d7f84177788da3189e0817a3f58e446f2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:52Z), 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/CH6542426863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319ad27fa30a6cf0a249a719e82100d0deacfcbaf2df9303039328b521f7bcfe. 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/CH6542435715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e4aa5422b6e48000dfdc4f21ffc7052eeb70f7f3a007c52df18702f3e5485. 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/CH6542466117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be38feb1acaca11882d1cb57b857d3e7231a1876702f6760ac4e8947357194c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:20Z), 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/CH6542448929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e4aa5422b6e48000dfdc4f21ffc7052eeb70f7f3a007c52df18702f3e5485. 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/CH6542466117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b535a5812a142add1e596e9f5d8598d405ffe726592a263e5a4e6b39f2f1d5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6542477822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e4aa5422b6e48000dfdc4f21ffc7052eeb70f7f3a007c52df18702f3e5485. 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/CH6542466117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37c8a7b06f2ea6269ad6106df35cc4f257e2f333e17446f21d33359ce6aa8c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CH6542566997.