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 0x5de0c0862301e5a13029523e5c9a7ccfa9271e03cf8a3a02d63498d4dd7764f1. 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/be88343c-bdb7-437a-b164-b2bcb713ff5c.json and https://artists.proofprofile.net/proofs/artist/be88343c-bdb7-437a-b164-b2bcb713ff5c.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 0xd1992dbfc1b671261ecf8526bea0a031ee7957eb19ba64af338f40a91aea4bab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM82451160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b57fd3f60583143f2e01760f4a506b312ffa46def900b647543db39d272076. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM82451161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564e0d88bc437d7244e21f7507fdb2539e9017de954ea304a18305ceaccc8963. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM82451162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c38e6bf43c3055524b7783973cbf99dd26aa50564b32a297ec75e3741919d61. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82451163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f6323e3181b031766869d8a1a0331b85f52d2a1398adc4bf0d4d4fbd10a07. 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/USHM82451164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314f1518762d0ec860cd4a1755d62cd4ac83619d72a0fbe07f40448f2e0361a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USHM82451165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71496dd04f4ced6bed13c76fb61ef1ff8c81304bd78a9c44a92444da7db0b95. 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/USHM82451166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce90650e42f04be5caa13ddb8626d081ef590342e3c798534205afc04679e1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM82451167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26f1a32cbdc19687a3f6d363741ee422d47d80cd150c15ffe30a2db2079a6e. 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/USHM82451168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e1b1e275cf362be3cdc1712170dc9a560d21717f1ed4f15c0d8d2a74abf8c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM82451169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62acc86252d5d77a3d566e743a15a6996851cc52f80160cd24bbb86f398b93b9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM82451170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2e3527f230068433d854dff0db7e545af3baa32fe5e5ef87f3cb8fa918ac6f. 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/USHM82451171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10248691283d3d44c4122ca0c1e792a721d253e04d4769e2ef0a784eefb7efac. 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/USHM82451172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2e199e984e18c9e99a8c914de462ab3d7789483ca52dd8764d4d22af4d2a4b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM82451173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a4006cb95c5bf2239367353d8aaaf968d64e95c9d4f373097dbded4531c9b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82451174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6489c4724d5c02184ff5ee8ed8bf441c498ad716ba083c736e21bb1bde8a3e. 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/USHM92441782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e9ca99a6f686c437bf7294270302ad361283d10b318f3b410c8227c8d3ad9d. 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/USHM92441783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac275b52eebf81ae9485123d7bbb267a094267ed9d7bada71b3732ca4f4ba9c. 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/USHM92441784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69deb403be38b74850ffca029aa0c83472dba676cc08e3117f16db26e6ba1507. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM92441785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1bcd111790adff1d93f8ebb5aa8fb57b4d7febd434bbe6df60a9ecda21a1ce. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM92441786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb568209e752bd0cff91b91c098007037ecccef399eaf30ed953cd510b6e53e6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USHM92441787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490cce5cc10832a9c6f53b28af49e43dedc90435474254ad556d941f02740fc9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM92441788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e6f5fb962cb02d9c22b3372834939b130fb569bee41ee49f392ccb53f13f0f. 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/USHM92441789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7360710ef1c14a53cd9ed4881589db5a2bae0ed80aaf492b9025f1aab3e80f2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM92441790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98e6623c0d26f80821cba37af9d3813da822cdf0f55e08db306189589d2c7d6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM92441791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe1c811570f78f4b842a584e5532fa4391fed8e2216cf1ba21e37124fd58568. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM92441792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613b2f6dc5f135876e5729f7ea5d46459cc9f797a18be9db6cf39a53d11ee23. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USHM92441793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5efb3da94a708694da3d9d07e59e5f6ec00875e8c28dba4d63cd4510dfbcb5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM92441794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7017c8fff1f6c76fb551590addad06282fdc4a37d33ebad9006ade56eaef5ee. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM92441795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91fd25611c12b7ace31f38eb813b59ae9ba4a6d0688e543a221116a00d877e7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM92441796.