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 0xeed811e7702815d7e4cbe3da182205ddfffa0e744836c1ef58972d6ff1980396. 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/1575a363-b2b6-457d-a2cc-08c71bbf0d91.json and https://artists.proofprofile.net/proofs/artist/1575a363-b2b6-457d-a2cc-08c71bbf0d91.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 0x030dabc5122adaaf88988ddcd405c690c466f26f379830a643f4beae903222b2. 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/GBMJG2324409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f5e5095edff021b6a8acc22c7c455577a70e6fba3578b4adcc0e2e060bd326. 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/GBMJG2324410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62045c6dcd97ef8e3b1ca729f356a0b4a3b51b5043e08b394e5d357628a0ebeb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:28:53Z), 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/GBMJG2324411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c8545e176b5de325e434e74ab3aaf96a889a6d4ec46560bb9846df5e28d3c1. 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/GBMJG2324412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1686cbb198960c27df4959f347299189b27a492db2f3a2076869aa62edf6760. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMJG2324413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4f55259c0794fa77832c4b962f3ff0fe8bff6ffe48d84207e920a718e9f813. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBMJG2324414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd453e62e22d8794b6a2dde3c1c64a8904a80fb92fbee14a619a25f7a2adaac71. 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/GBMJG2213239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe35fefdcb04fa36ba2d34a28968181164c3bb4bf8ccaa16dbb5b5eb55668f. 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/GBMJG2213241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef464e08798dc1f13d016e745d7bb58aeeea88fb3af7366d5829d656d55089ec. 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/GBMJG2213245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e76eb36ea8eeac9f5a0378cd3b3157b20c3f017370a8c3aa90d1c5dcaa95d9c. 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/GBMJG2115289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887cbdabcade037fd9b7b1c03efcc2f8d7ef7a3a92d27b90749363557dd780d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:25:25Z), 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/GBMJG2115293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6420479b8b7c9dbe707618418c44f7dcac4267388b5cf533220e8fc58503fc4a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMJG2115294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f5f42e2115ad42d990d422c4b460f838224a2062aca7885be910728386784. 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/GBMJG1902651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa8c72287ced814f3d8a9d87288db32251d60b6b6d007c6a8a30890ce5b5d6c. 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/GBMJG2120314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4802c4bbc92e587562d4ef7298a3ecdab92dabe1e667de4b68cf123f8d7d0f. 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/GBMJG2027286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55516857d19acfd8b1b47718e37b296055b4976fb6ed6282c1ceea5d7d741dda. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBMJG2005026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f77881256746fb9ff218b32cc89c744589c069251241b4d7a8b8c5c3b0373. 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/GBMJG1921053.