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 0xb93a1a128716fe7cd7196da6cfe080d6b6c6705f668d2177057c253f82c83884. 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/1b975983-6043-4a87-a0ac-9c1021ad52f8.json and https://artists.proofprofile.net/proofs/artist/1b975983-6043-4a87-a0ac-9c1021ad52f8.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 0x8ff1fbe6d617d4a26c1e0e653b75cf73b3347d9b731d03cf48eaf9e3d05c375a. 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/FRPGB1804430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a9fd5ddc4c5301b27ad23854ecc91dfdedd6f4102445472e5dd4a0c19b6667. 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/FRPGB1804440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efd16482bb348d1a2ee38b57fc1ae53814a843d99fd7109824dd56d49105da4. 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/FRPGB1804450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac59fc458a7cf556741fb0d614380bdfc8013e7d0425d040141286ae01b2dac. 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/FRPGB1804460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c340e2edd37c5c3186c7dbb16bcde80af01f8981c99f478fcadc3ee4ec8d9. 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/FRPGB1804480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4e6d7c7f6c6a73f896be25a76a7428a260c525e73c6d286eae570982a24b5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRPGB1804490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f440f82cc5cb531bbd8840a71ac5f6e129a635bd35625814f3fdf00bf4afb35. 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/FRPGB1804510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6980f2fa474e31a278ab7570e91ba16c21cffdaacc563d56efb7938278c3d8ed. 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/FRPGB1804520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9be84d9c882256db9b7ee9551bbf1ffce10d4446dd590ece75cc7d9672c184. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRPGB1702980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05fbc7879d571aec0bcd40a788e3989663351cb37706af4c13a35e868f41c5. 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/FRPGB2218220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f2b98f68ae4bf73a0c1aa0634e5cd471ed74e0bdecec841a90d8d3fba7e7e. 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/FRPGB2323380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7fc4f7c61ac5d8ed84e1d435bad584349ce56e929a25a852ad9ad6a1df942. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FRPGB2323460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c944f699db878803d634e28734b91c740960feac61a6d74bde345e5d26eb779. 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/FRPGB2323480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290dee2ce9aed642693687a89482a84d259948eaee02d5205593b049cf1194b4. 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/FRPGB2323490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f602b6941ee4342c6ae0b9ac9828357b44c4b23dfec10768af3c14fe93359db. 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/FRPGB1300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d1460921d1266b515e7f6ac1ebf3d28c4f92678149799711df3cec1ac5e81. 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/FRPGB1300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe654b319fba82f020cbf2e277bad1fb3e4d5e078b2d566ed6569cd8ee767650c. 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/FRPGB1300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf302cbdf066190b0c8380c10fbd872a54ec4761bee7c5a3e78fa364d7407a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRPGB2112830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be06ee3867c8f853f8e1ef1274452c346aefe45cd13e9bd3f749bce0f33e28. 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/FRPGB2112880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431f574d24b2aaa2d5636a93c99aa6423a0d708d367afd4f873229bf24b93ccd. 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/FRPGB2112930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef47102501e010b03f94ab82f06401c214915524ce6d28f851e5635ac666382. 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/FRPGB2112960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468d33361f5ae18666b46989a1f53b8c24ab2221fa83ecd341b652b8fd29a611. 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/FR2R01100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77a7baf92ecc44a5d130701ab5d639c791537ecf275c01f2bdfed9fc5a52984. 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/FR2R01100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d1f4dc4f39692b3b6d4f2d6e9390b2c090cbc7eadc89dbd88bbf7e25e0f036. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/PLD641300034.
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