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 0x6237c697bcc1dc64109dfcc55e249b231f3ece67154536fb44a68cca42ef39be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef6f0cda-c837-49ad-bb2d-220b3a728e0e.json and https://artists.proofprofile.net/proofs/artist/ef6f0cda-c837-49ad-bb2d-220b3a728e0e.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 0x344c79c77c128a6e2f0855f768b94f19a9e14b0da512f9844d4f4989233c502c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:50Z), 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/USDY41666858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27559e236ce80ea5111422b05894c237978d8967c6608b0733077acaf1ed981. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:30Z), 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/USDY41666859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5747e2800b1a449813384ecb7d1a408ae04beef26ffc806afb5b27ba5de7ba12. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:21:44Z), 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/USDY41666863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3af1534a7e75f68fefcb6b73299e4d220a82e5b95974d8a942c363578c7046. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USDY41666865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a032f3acda63ce1ee455b064f7df4cc34c70be1d5d1cd73366c099ffac39cb2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDY41666866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98e7d81898102a1547d4394d4efa2fb7d44e67b77af87895669acaa423da82c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDY41666867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef14cd962c9619bb51d67ed56c630e20dfecb8bf7c1a2bd442d96b6d11fb425. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:50Z), 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/USDY41666868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92fa4a411de8ef122c4f787e2026fde368c0e669f74ba304ee4c7853e5ae2d3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:39Z), 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/USDY41666869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c12583d865bf7f0377a855d87a8d4cee466d2ce5e09d8fb12a7f3baa9256779. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDY41666870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364849c4f3d81f78836131ac229db84afebec53a81a5b3eeacb972d9dff26872. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USDY41666871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b3cdd4aa3535b8ca5243a88e93e2a68d9f532855b24f73a54bf38ba363d1bd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY41666872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4f408d034246715f89ea5eb9873fae65bb1c1bbdbcd1a7216fb17bf84c9ed6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM91639039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159800e48c865de2a41410a332a6fa7037bb6c97d109958a9354ae62501bdebd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM91639040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9465364cca89037517d243539c1819271e8bd81f6025bdb5002c37d58cc9f34a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM21927080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338297470c0ceaba8ae769f1f1b4aae8818d980599f31506d055d9e89f55296e. 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/USHM21927085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358c33e28f8401e034aa5c7d90407f3016199cf2085386190fe120d91d24a8d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM21927086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9036aafa70e7f7fd135ed00ca7ef8b75ba74b831096da2c841bec49135bd9c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21927087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8c68d72c1b752b3c724c45d62cdd52ce07b470ddb8a83dfbd60195258e58b7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USHM21927089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d6bb989c0b5cdbaca6dc2b45e4abe1c30204200114477b88e0ecaf207588e8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM21927090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507bc1dabf46464fe2daa924b87992630c18d56136668d3baa8629b312d6a9e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM22397178.