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 0xebb032a74c5760ea0eb4b3e87481827cbbbd160c1357b514b3f64e6c095aa53f. 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/51be6caf-3e64-40ef-946c-c8bd6647628a.json and https://artists.proofprofile.net/proofs/artist/51be6caf-3e64-40ef-946c-c8bd6647628a.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 0xc144fe0e229729331e99c25561dda8a0d198a8d4dd41e0c05a7bafab7d65e362. 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/SE6XW2169635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c4bb75f35a90d9d5d6a8639bfb1341fa955f95a2b38793207589302a328504. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYY2239327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5f2744cecf11a4892df07d921f9cbc5fab4d1ef35fbaad5fce97b6cc6c770. 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/US39N2203962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab57035b2e19d667fd0e61dcf7a415775a3311f3f2138ed61b02db56b8b3a49. 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/US39N2300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30357cecd3020b04b143ddc861ea5164f20ff642cefe94eac0f48342327e2bf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US39N2304230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777b3eeb9d38e5f8bae9c4f08ea658805dc84b56bbdf7c981ad39e602ffbd152. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US38Y2411129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc144fe0e229729331e99c25561dda8a0d198a8d4dd41e0c05a7bafab7d65e362. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE6XW2169635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5f2744cecf11a4892df07d921f9cbc5fab4d1ef35fbaad5fce97b6cc6c770. 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/US39N2203962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098772e634d6e1a31a5a34b52dc7bc4a2e5dadc10c514e2fb1ea3fb567ad4af. 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/QZDA52268973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da7cee83ef69e942b8e93ac0fa4fa506309c33528a41d3339248ab0ac20705f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX202361353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb7c7fc1049c789a2a42ecf6fbbbf7fcf027030e04f0b52a248dffb3f423e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITAXQ2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf66e9264f23bb0b799cd43469e2766eb5186b8e1cc4c4a19176362e664043. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITAXQ2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b4f790eca89b22f56fbfa4e6884227588362fde840687841b5044e610cffc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2510218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb7c7fc1049c789a2a42ecf6fbbbf7fcf027030e04f0b52a248dffb3f423e0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ITAXQ2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf66e9264f23bb0b799cd43469e2766eb5186b8e1cc4c4a19176362e664043. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITAXQ2500028.