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 0xab8b42784a5f3eec90cd505f2c223103f174bb70de9959a0380851f36636c5dc. 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/fdd524c8-effe-49a7-b23e-77658122579c.json and https://artists.proofprofile.net/proofs/artist/fdd524c8-effe-49a7-b23e-77658122579c.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 0x642c206c729e788196b3dd466967833aa8243d1ea33db173cb84b6cec69ca9d3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:05Z), 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/SEWKB1305004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a91f95ff5185def63c053092ffc8947e5553291b27d7ca43efc98d4a98910. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:18:26Z), 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/SEYOK1750788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca946f33d022450719962cf8286e353957886c276bea1020c94f3ba33e777815. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/SEYOK1750789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811b8b21d66cc1b603f006c23e0fd6e10a3dbc451d5fd948aa1db84725d83d65. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SEYOK1750790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db61e8bc374bf0bc39f851eccd9ed3d286770e50f3d981ecbd1fd3d019a88b3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SEYOK1750792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9bfe91a8d28fcd254d6fd1437d83a941ca333dd205cdf43932624608b77f5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:01:48Z), 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/SEYOK1707668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb722be95f7d013bf5c8ade4db61b917ad46510e12fe2e954f6434be4d956326. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEYOK1750794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73228b2d58a38c04c16021dbf893140ea92e853db93f461fbbd5da047f048260. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:40Z), 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/SEYOK1750796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c838e718478be3eb08c58d59062a9b5e7f5860e618e4fcd556ca533f0e6eb4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5S62200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b67315399a3bfea0f565c4e25b2532f7ae4488b1532e62362e4404fd5bd192. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5S62201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb68f31766da2d6daabd0646cc21df01fe185eb7ee55154180ec2f48d6243d0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5S62201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5813f582b0935f8e0983f7b47a80f6e1aaa7594262470697d6b96da09b8947. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:30:19Z), 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/SE5S62302501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4d1b3920491553d2e2f53bc95ec83d7dc768e8ed19116b7e988f4f08fca47d. 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/SE5S62303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace542ffa432577e182054ec8323c2e32779a5e74ed0e61e79027a4b23e07c2e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE5S62304303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a2cc54111ec8f7429c79563ab7916f55bc310179403faa164442e2c458d5fe. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE5S62304301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f2526b66fcdf38d3980b70f0b3d7eb2822ae15e3baa9cd7e7d34c590b2d714. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE5S62401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd52987094e432c78f31301193793a446c4c9f8be987debf74ef1cf8498be29. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5S62401213.