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 0xe38baabb4726e0351299aae477908211090533efd5a714f888db25dd65343c6e. 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/b671fa3c-61e6-4f74-8e63-e2d6e7c45cfb.json and https://artists.proofprofile.net/proofs/artist/b671fa3c-61e6-4f74-8e63-e2d6e7c45cfb.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 0x06783f354e18f7d71b7375ae13735a9285c5fd6962c4ccd30c76c8e216447c62. 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/FR10S2419055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bbf34113ff5f378fada903cd9add1f4874ece00b8afb7d5f7b6fa11c7ae519. 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/FR10S2369432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f20b59e09a4416280bc16256ff863f57295a83ffff1609cc246bfcce554898. 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/FRX282254755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4215ef1e7f875d1d9ea61c3b4e14755442757f168ef1171c49e132fece4046. 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/FRX282254756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f796085ead2bdfb7c613f826161c223486e3e4fdeddbc06c2dc1c5997dc9979. 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/FRX282254757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3655780565a47d8b90aac44f856179792085fa5bd8be722f66b35dc6e13eb932. 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/FRX282254759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8df779b9d86eba739b31b933d9fe9b3d0a013438399684b7581a982123936d. 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/FRX282254760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2244dcd1cf556006617c6c262e43f283f5cd5d809f2731c0894d7d5baaf13c3b. 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/FRX282254761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d6eb62a8aa5419b3a6c893c99d7af628d3441dcbd1d1e4a912ffc1ab1523b8. 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/FRX282254762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb03904c8e843166ed3534edac647d6c41310bc69fde789114f704cd5b7de6. 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/GBHLW2103342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8815b953841b95202bea777f994c8040a004ac37225d9b837840d17745aaec6. 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/GBHLW2103347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613913c0e0d634656df1b7e7257dd8d74eabb4127997f481f6882dc5c0df3635. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBHLW2103348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb285633c112e8a85dda27e316d24da56d3bb714778e5341975e7560e8b1bcef7. 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/GBHLW2003685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149e294cffef10a704498cbe5a577d51367f704468f047cc57ae3578e786b329. 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/GBHLW2003686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf9e99ceb547d2d9113e7e7dfeb3842bc44a46db5becdce25abf9e0d656a14. 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/GBHLW2003687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4543786c3dbf8e937167dfbd46701addb084ab0aa4bc4b6b6a425039d50ba9e8. 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/GBHLW2003688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792ae69520e1322b1f9605f50ea16b188246613b49cc8fb0b8d5593e86a85f4a. 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/GBHLW2003689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063223222a2c3d2a09e42507779c67841a318dcdb9d1e635b90011b8c560a272. 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/GBHLW2003690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a37bb1c3b09a621f4c9aed9b947562c81df1fd856e78ce367683ba996e743. 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/GBHLW2003693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba39e5b7e09a3acd8363a4615065b4feca9a59d02840911b42a5fb3e47bedeea. 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/GBHLW2003694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6b8c1a5e1d3e9d0ac377cde3bfeb406c48d0dfec0cabd3ca3354799d0ce4f. 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/FR10S2419051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c11f7fe91c316079af0d391aa0365e5ee002731c7f021b3aa13b55e663074b. 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/FRX202324388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501272ccf03e059ff5451efdfc9eaed8654a0575417bcd1889edfdbfbbf44e8c. 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/GBHLW2003298.