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 0x8ef4df987d59b88b7f9191865beaedca1de062b1995c39ef8fe747e01258ef7f. 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/7ca7d8d7-f4cc-4b41-8199-816a1c6455ce.json and https://artists.proofprofile.net/proofs/artist/7ca7d8d7-f4cc-4b41-8199-816a1c6455ce.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 0x4dbb8eb5b09d7d917040fa555dc370df12f499ac656f9012154cad784f08e626. 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/QZDA62076125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072c6e1c24ed00db4c1be6b42642be5617bd7b2b44c17b675e16c5b3b7ed5d2c. 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/QZDA62076126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367835ce2d2a09670375db4083ed5031d7b620c546dfa26a7824b35ae2319dc5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA62076130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8afb72363221551d77dc1dd4febf635a4457892933e5770e05be4098bbd01fc. 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/US3DF2008150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e89e52073ae43c51adb74084da4f3d22d8a9e4c9202c818af77385d744fa4ac. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:06Z), 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/US3DF2008156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140189316ebfff82cfa6d5031898d2e2817b57b25b1edf5f9694ba2257982978. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2008157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f2fcfa76c56125fa6fcd225d359c34fc36e993cfc4dcb57b4b6504832fd880. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2008169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c62370d85621decbfd0f6643f7b2cdd7502880de12158e2a5ecc710affd5c. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNWW2005363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdee63f2a5181b1b6087a84df58bb74c37c36c5adee6542863b9f0c3a7020816. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWW2005364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80213dd2691929bcd6d9bb99230d396e069b6d224057feb8a509d8b36c2fef41. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:08Z), 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/QZDA72180676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bbfbf2f8415490d187f30ac1e1e7a3e518aab6ff42148de269d745f1dbb69. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX4R52137359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5a77aacd18f05d9f4183e7ab63d5dee9139feadcdb2e7bfd2e46f6f32edd0. 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/QZDA52259645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dfa65a3051dedd549e41b98453f5cbed7100b5287b3ee4bd6a440939ac317d. 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/SE6XY2237752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6076682097060fde161f1fb1d57cb27e63834178f0794655a6d1e683a4d5a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB32250938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f9f4b981e315212a4f52c1d67aa3c6014e573a5b0436d1be843b74ab1ed8f1. 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/SE6HN2435584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47eb1e86fb338d643f403d6677c3b62c891d162a9df243fc8dcae24bb543c7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYY2280064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f86e01ed894b1bc670647b6fc59b51a23f94decccdd47c72ae79c605239ec1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6Q2106869.