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 0x27682fdd1f6a4204d13ffcbba4d18e1e760205752c9f50c33ffaf30818926d57. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/077d0d39-bbd1-4705-9978-3726feed00f5.json and https://artists.proofprofile.net/proofs/artist/077d0d39-bbd1-4705-9978-3726feed00f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where There Walks a Logger There Walks a Man/A Loggers Reward
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 0xcd6cbf509c998fb57b1ebfb1d4ef67cee03216e2e245a32228c127c7e18f456a. 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/USHM90796787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49a3d915a3abb468d6c195f887a9710c5e3a22db31a422d7f435d2e85752230. 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/USHM90796788.
Where There Walks a Logger There Walks a Man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cc80966c6517d0b290c5a48acd40854421cdaa715fb26bee27e5239f9983c9. 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/USHM90796789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ef4db5daa0ba3ddfa286c03c4e202e2a4aecf5015f51e9d9e9c0f4517f42d4. 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/USHM90796790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61dbdc318a7578f2b6587a2f23d92b97ab04098183d356488d160d899ec5923. 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/USHM90796791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e406d9108be3e5298be9e9a922325d0fca07367427643c3bdb2b702ba3d535. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/USHM90796792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ac595677ea1d2a04e248511fa105bbdd09266c99623c7a5055ed8f40186bd0. 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/USHM90796793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e1978e0001d88d464071cbb2abb9522686c4c5e4bfd5f38faf29dd02891a9. 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/USHM90796794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee846b6258d20b14d55b305b9d811e4104d621ce44ef7f4f46e6b4feffe74fe4. 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/USHM90796795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71e0ddc25328da29c03ae825d019d71b5f01642c1aeeae7690945d2f9ecdc02. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USHM90796796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff31c51ac6fae2b33e541f2a7722b459e610740ef4565419bc547b16661f792c. 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/USHM90796797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c92552112def19877b1ad62170ec9245bd98d04fe0facc6f8d3741c9f7e37. 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/USHM90796799.
Different Kind of Breed of A Truck Driving Man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd0d6693c029a5b8c299b3df289e7b67e79aa358df6f1e45be7d2566906431d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM90796801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c2627a81dc7949b4813514b4d95d3eb5b0f7ec23cc2972cce8f955ecd1a05. 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/USHM90796805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e83f75a5e86816ac27891290548b9e5be71ac4674f93c6c219172e4f18cb85. 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/USHM90796806.