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 0x085952d6b7cec25f4b6a5b2de2d02a258cfc8b012198a1bfe2bf500bc369b351. 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/6343e256-af83-4342-a7c1-be6b9dda0bcc.json and https://artists.proofprofile.net/proofs/artist/6343e256-af83-4342-a7c1-be6b9dda0bcc.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 0x9235a3b6e2f398e3fe7f81a0d16d1f1f0c1022dbba0d64be8201ee26773d6ee9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAAY1194850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92548a5ec25413ea55c5eeaedf21daa3bdc9e9c9f84f657597ee8fde91c691b2. 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/TCABN1360861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eac2f276c2cca8ea6f2116b04284a1d7ac47206db0d5f49c274126c5a9bc7a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCABN1360866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce74b60c866b696c79dffe5d2d4002878ee9d34b049fe10c79819c4f9ce71a1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:33:13Z), 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/TCABN1360891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322cdd1dc681e43a602d2cb90dac14f147e24103f94d2e622628845b537bab39. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCABN1360896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acf91915874df944fd9e611f21543b692473671cac2929b3eaedeb7a611aa71. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCABY1451714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1494e87d300541eba1ce671f24a1f91376955d10e9a78ecf27f6ee7e99ae71b9. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/TCABY1451718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12a9b5d0f3135f3b510b3d06ee9a1deaa6762414d7cd367fbc421504e9020bd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCABY1451719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6327fd8b312a661826cadd9cc629cf7e6b1ba6a73d658755204668ea3e5881. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCABY1451721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f38990a40588bb3adeb002b9f76c5cf2f642d110fc1dfc2ade8bf235c1ee370. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCABY1451722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7348aa9e1f1fdcbc9ea4d267dc46118e7150a9702091ef46f087f86cb27b36c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCABY1451724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3bf07da22aad07c1d3f123f6c837c626396c2d1935cca26a1243352f4f1847. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:30:18Z), 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/TCABY1451765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94134806b0951f6bf89922a7b6df9cc372469289bc8a6a6e8fa711b8b0024959. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCACP1620613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f437d68c97e26cdb783d74bde4a388424a4a8695cf3fbbd08b34be995b1a0d. 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/TCACP1620619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da94f7c6b8cd5be1d11f5a85972dae10914e2f520d6f0959f3ad13065f6451f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAEB1953623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15944d8bee94a41097da71da4bbd30bb7d83b538502f504572eef0cb5b0fd39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEB1953625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e44f211cc15d6d0dc174cb7177c318054d97700ec51d9e4935af494cc2c8e4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAEB1953633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26948055538f68c596fbb77704c04270aac5381813e83480d8ea85b2084f3f8e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:28Z), 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/TCAEB1953637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0223002fa1d17c599c5f0e324ae532f0be4554ed3d060b65f257b2b508c245. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEB1953639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8fd4f4648790b03ec93c5a4d8223c29a358971b352bbaa1db40e48adc3c408. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:56Z), 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/TCAEB1953642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b365c072de20e4032aaf635783a8289aa09d4580d67e62f0a0c6050819bd2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:29Z), 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/TCAEB1953646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606f5b8d0ede0108ba35e669ccf4400d998e60ecfd001fe937085deb497dce89. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEB1953647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0d8deb32387c7fecad263978a00a2ba9179e1295fbd7633c3fe546e791e2bd. 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/CH6540848912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff5693d85eb83e97f39050deecda7eb2201e11c7625ae986f20679006b29cd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USYB32027807.
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 0xb005c85f14cb538f2827b651a1f5c2386553e27f19f5ea73496c7739f9b49a3c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CH6540848913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ebd347e25368cdbb550edb360c17e10e092f4ea41c0f06d3eff5922d25a3de. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6540848914.