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 0x7098f651f05a4a354ce96de96b72f84f5621a80e1e8d9d2ccf7a6c5b3be0001b. 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/39ff8381-73f2-474c-aa78-e278196b55cf.json and https://artists.proofprofile.net/proofs/artist/39ff8381-73f2-474c-aa78-e278196b55cf.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 0x392611b47d8bb3eda446350e64823dd9e056291b389f4d75a874cfb861f7bef9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:29Z), 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/QZMZ92495065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbfb0c28a6055b9d94eff4111a1fd08369cb21f83188b1153e5db428aeb8b9f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMZ92495066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7244c75a671a4f2be3c1234f69e30d4faf902046f1ffd1c7c418c3c6c4f8c. 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/QZMZ92495070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404bd653b1829bac660a0a21ef4534a1d3ec834bb6090cd3577fd3a4cf55873. 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/QZMZ92495076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bba18f9decd7f5782fa1b945288deb1e487f9e476aec540315153be42b979b. 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/QZMZ92495077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd3961eaa6ae31d4eea3aa432fa70bfa4924307c89cccc8c7c98bf9073de2e. 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/USHM91242668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32045a2f3a37e33d7504fe06b9a84cc93916284c2ef6adf6560769b300b6b69c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM91242670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b518fe129b8ae72171966a81751045d412229f6ec2064cd1299ac7f02f6ec8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USHM91242671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4938da1605a3da4c2c5b576274334e031aacd4a96804bcd722d5b94f72e438c6. 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/USDY41560517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b304a76ce04310a94c9412696b7071e3e4a45183a53942446cfc87007389d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:25Z), 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/USCGH1765847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7955680dddbe525404b22471767bc98955e8e10606053a5ae8c26d0dab7ea410. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH1765848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283f3c42156af9cb1aec154743bc4155d6a95232a4365ae4d6526c1f5a8e656. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGH1765854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5861a1a545b37795e437ec04656000e7c2f638a7c53056fc2f65e4f2c018f40. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM82197126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade76315e0e5f653555f6bd3b5add3c954a10618ed14737b1af8c8c3c874c303. 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/USHM82159222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709acf7c2702df59be4024e350440074727f5f13f93ebbb3e753b72cccacd1a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM92282634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0f95c21f9864a31571239564c757f13d7d5049cad7079763fbc48ace452e3. 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/USHM92296755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9512ec7af09c3036d6a7e2c743b5c1fd7b217e0cb2c4d40eaafcac6d8201b532. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:07Z), 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/USHM92296756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ec6f81e0e10404a77710f2318913dcbacb541a939f31c90763d22b0a0147f6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:05:55Z), 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/USHM92296762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0847309c9f86dd53c49482e98d3e1b01a00c0fbe0eb5dcdb563f158c408f98. 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/USHM92296765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6cdda6acfacee4ba9ba1194a3052c59de72321c1f9e5caa749875050b38a59. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USCGJ2593549.