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 0x001fb4e80494d827535fe793f78e8729ee36eb1015037d7d19231abdadf24cd5. 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/790b5ff3-3d1e-46af-ab34-b0df8206b57c.json and https://artists.proofprofile.net/proofs/artist/790b5ff3-3d1e-46af-ab34-b0df8206b57c.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 0x7d83c02315373041a5df382b4ce1c2499a3efabb5d22adfd0b4c0dc2a6dbb592. 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/USCGH1756554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af7c5e64a2478ac43a7484fc990a5f6333bdbf88ea3fe6ae17b16cc242622a. 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/USCGH1756555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106cbd16b00080f38082861412deb55c01b62b9771ad9b561beafe2f3700f19. 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/USCGH1756556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5415b65790be19395e789d84dabe2d1fe7d81e8e380c68f6622ddf7dbbe159. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGH1756557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0811175c747149793e286dba04392c0c78d1812536557eb9e58fc8efe0d2c9. 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/USCGH1756558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b12c7e06f440f8c5c60c3f8769c61d3b2bad6e776029e65db17290ae559a24. 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/USCGH1756559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e87c09d53554152c6cceb4052d25351ff5c27440a0bce6e4b1b3e4c3d4fac3. 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/USCGH1756560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1cdf0183291acfbde476f3c16e52ac5e8cc6e7e40b5f1a88bbff028b6fe64. 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/USCGH1756561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116073fd11b6da9b8b6a229067618c18dcb823be040d1f0987647ca790a98ee. 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/USCGH1756562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84d0a041ef67911c7a87d50f15c5c4f3317da2fa4089444529d128971ef72a. 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/USCGH1756563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb618dc6580c4a95f05e33f507cdc7379c7f117d2725ecbfa7ff410e1aec7e. 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/USCGH1756564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dd7d38e7964a8947430544f14184f8528503b325bfc616f6144f92d08ace35. 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/USCGH1756565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42afe683360c3712246fa9dad90a48e6c90387303cd1df65d1acf25d4b9acda2. 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/USCGH1756566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06258fb75f18277c0890a1bfa5e3600426a18a4d4afd64b8463a9fb0c5a4df24. 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/USCGH1756567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae103f69349ad6ade2bcab776b07b3ad559832e5e5293eb6a2c7153b932368c. 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/USCGH1756568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e55dd30275a97ac5d2c50c45a71f550c5a69e1d22129bba78aef0c2acd311d. 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/USCGH1756570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6c44f4b500e358e761dd4bee02bfd7aa57764a838b1b8fae6a814acc46f69. 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/USCGH1756571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307303d28e4362407b51e234d298785e2668e30577749586d829a9abb464b8b. 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/USCGH1756572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedd6d7cf7fcf230bb0ba162133a44913ed8a1682cadaecc3a65d366eaa001ec. 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/USCGH1756573.