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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01d407c87e1441d3bc1c5af64b7bd8b1a4dcf5f2a3c3c38b9258db23e130e42. 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/e4ebf3ba-1269-47e7-ab53-ce05f291e585.json and https://artists.proofprofile.net/proofs/artist/e4ebf3ba-1269-47e7-ab53-ce05f291e585.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d760bc71beec52a658e61c3b8d15e34bc9ede25240078a77204f993b9bd2c1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JP92N2307870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e80a3b6e2d7c2a1148c3f8b89fba3f533858793b76824145fe231278f87a3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JP92N2307871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0067ff66cc743ec22648965bdee1659a561f6db4fd9213fc5dd602d76f22d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JP92N2307872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab435a07f482623dd272d92ea7d60aaef1b50ff63264ffb91ee28ff72d449ae. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JP92N2307873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784778daf0b3dafc3cf15ec6dcb487907440d786d3537eeac7138c6f65062a3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JP92N2307875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aed4c25fafc424dd19d2a8079fe3d9e3a96b6c418423bec73b5676e9f46bb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92N2307876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a471c23ecc2ecf9a901ad52ecbd73353b29df6ab8b66dae5bc670b09d8297d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JP92N2307877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fe57f701aeb8ff9c4fc6e5da30cb076d8a293afdac0e36a6418d582adc4251. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JP92N2307879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa14b218fdba9225d5ba7c326620578f997aed39156bf0877da0987050bb899c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JP92N2307880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1770290854f889957029964e2cca8ae9aee321b0abe2dc50c39f7a770354bf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92N2307881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bbfa42ac2f535efa1ec0c5efd12ead7cf65eea7b425e1b639cc3ca76ea0f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JP92N2310808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30de301c5e2dac3ba2e8a87bc4169bb45cfb259051af58e41a895855b8b1057. 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/JP92N2310809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42de5004950e92159cd56366ddda7afb7c5ea7acacab3c730abec6a81cc444. 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/JP92N2346052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb04fd635fc2e1e02d235dc3157355d3542457ac691b9515250ab0fe782c71. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JP92N2364725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa092350e17f53282f4a590b2ec9befb3705c59d0e885d10e0d018fcee35ef91f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JP92N2426715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d90fb9e0515b6364e12a83cf111be7451426dfcbfdda6515152d99f9ac89c0e. 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/JP92N2402270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f61a535e0a2d52be7e1fa0c764cab39bc32fac9d3207b82a3912d29093367. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/JP92N2407473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f979326a12f4ff491b559176b5125ae04a5144d8df461f70cc1b14aa5e714d4. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/JP92N2426716.