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 0x631e32f8bf7e49687c8104a0eb5d7cfb52b513da1c406358f58ffc1d884b75fa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/584e085b-37f5-45cd-b8f0-089d9d640850.json and https://artists.proofprofile.net/proofs/artist/584e085b-37f5-45cd-b8f0-089d9d640850.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 0x973e02b962f07d29be194a5ee666def1ada4d5b5d91e57a698b63452b045f894. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HUA612000935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b9d80800ac626cfc052d868b3a8478fc95ed95ab47765c2c4d201a24d88ddb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HUA612000939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f11f87999eefbaebc4c242ff6b4e9e5338cab7da2b708d8868b8f0997b2c40f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HUA612000944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b809af0eaaf4d24d06ff82f0a47d52b0b9d9f781d49d3b6d62085524c57c6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1562048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c744af2692a760094d08cb211d608b55d5ade1e078c4c4ac1d375423fe5a2a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HUB120800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9780325a83a1a515320d09a7d3a91624c6e255d9674cf327f439cfd21e01eeea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUB120800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3607ba6c60e9d2c2784f744b763b84d37945e3972844c6134f566cfcd02e571. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUB120800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47588c5882eee81ed17a56448336da79858440a537922329139198df2321ba86. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR4GL1086927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2700c2cbe3bc9ca0f5061c4758d4275245e81ac6444870814552b30b02e4b3. 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/HUA611802829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0eff96ce5b2b5749289051c1b38a5e8598bd4fc060329eafae42c54e5b8ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611802842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d18eebfb88e50be5b49c9302ef06d6f620ad3ca1577f60935809d5f1f4dd70. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUA611802830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6e2799a485dff86c44c5ec227c40ad31916d6233dabf49685c39b78c31a264. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611802843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0090616ba8b0c9e035c37f6559943178de00c5d745c165cd47b4656f230d8. 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/HUA611802831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb972202869cd136c977f151665b1c7b6d3d70be4bbbdcdd22b4637449cf99fc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUA611802844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909c1494e5f40e1b612fde22c70581f4552d77b2f24b1ca2b37e48c83fd2f22. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUA611802832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a6c9a86b5121838c8e0ffbf5839a318a4ba36aa224a80ae9afc2038c079ad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HUA611802833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65704c25dd6e1d70df1d1f0cc5b391cee703822fec524e4a3db32a5f29d73961. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/HUA611802847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d375fcee0d2301a725f6c8406c353dff4a9c960861a4657b19cd7db37c732ed. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/HUA611802834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d55cf9c39715d587f63c2922b35b05d149fa9a52cb719832a705669c1e3e9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA611802848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f28dc9b0a2cf600f1146a645d7a954f1f81fb8cbfc2bd8f3653696e0ea7fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611802835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a45262ef0a8e2396812c40596029456ed5ff271d0c3fb3afb01e89a50069a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611802849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92448f7e1c670e94dbb1572b36b4b1fd7edf41b520959fa427d158ae6f70794. 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/HUA611802836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75496d29db6f4e52aa2e09915c7a6461ed4a905939861d1249f6440aad291a24. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HUA611802851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167ed997f70514c4cfd1ea2bf53be3f63a4efa6f05707a3fffb165d11e1de6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA611802837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff13c76b54fae06ff60d94182f28ba23fea61340b914fc1328f47d13138a89. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HUA611802838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e53af1481aad6ff63c95b6f13627d4e2eff855d3634d57161b7c0ea2dc1dcdf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA611802839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac619c511ecb8b82260c8926dc38e54b9cf64f8281ae120f43decfdcace1d0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUA611802840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83495ddf55f404eed9d93be7954196a27a5629d581b281586593095c58e5f9bb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HUA611802841.