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 0x02a38a524bec1dd804f9917cbd6cd5275e3797ea8fbc3e343a97b1c37a7cd822. 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/0b854f3a-561f-4d0c-88c3-8cc05c9a3d59.json and https://artists.proofprofile.net/proofs/artist/0b854f3a-561f-4d0c-88c3-8cc05c9a3d59.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 0x04dbe9a180b763ad347b83a63fc1a0bf4ca90e539b31fdf1d1ca9e02b3e35071. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42432262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4701091c9609053700dc9b64400fae25a8b888d4cac7134331a615d220e02. 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/ZAK172400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e53bc7b1a2fd325f0d25775f8e526bb48f60869142a4ca946c7ab3f1140fe8. 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/ZAK172400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aba9cc0040ceecace740762f77bfacaca4ca9801aaf271fbbe26d8aaa952aa. 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/ZAK172400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1f5421446d57636b87989416f167835679f92e4f5e30ae5f7dc87baade3cd8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAK172400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac125760cc668857e3af878eba84f78e3bc9e9eee8ddf2984b9581a6e8b6a68f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ZAK172400012.
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
Fugama Unamathe - Private School Revisit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec184d633eb7015cf652462e42071fef5bcfd3fb9d2696445ba9adbf0794eb. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ZAK172400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e293cc30354e129d4f9be14d862d1180666ca7b256414bcd3dc0a28a9c4ad5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAK172400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0f439712169ba196a0fd8ea5e021c81f464c09f51d455cde062120781e29a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA22326099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c6ce717f6cf78b29acbbd315d8011408fb9bff032611ff09c0409e9c5b307e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMA22326097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8c5dd03d2718fe959d0a0a646a6fe7297e26cae5ae523a801f2917232354b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBMA22326098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152aa78f65802516fc310dd302823552fde7adc107b7239a97dc27d0b604f97. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMA22326100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc160803a9ac02b525ff8b7376fafa1a7747ce821433c61d646148ff5d0dab5e4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBMA22326101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e57ffc63ba587c83eb3174bb7751484388c9b46dd184f635c2573448e97e854. 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/ZAK172400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ca83d170f93354f3d5283ac9ca662f925d56c7819de7ff4c8bbe00845df55. 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/QM6MZ2423859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa0217bf05593fc55af614d16f95a209f2533e4e359e5fdb5ee2c73250f25d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32285770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba65a4c068ca22063f46226dc6e5a38108c2d1a141be7b007632cb37d23a37c. 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/GBLFP2469864.