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 0x39843699aab759097fd00415692a5e4a9122aec617bc8a9a116c5049c2f642d6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88bd3a51-a45d-4e6f-a4ec-e6b24f2892d9.json and https://artists.proofprofile.net/proofs/artist/88bd3a51-a45d-4e6f-a4ec-e6b24f2892d9.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 0x36ca4d5bf16eec0dd31b5923ee2c5d9825e84ed6abd432cb34ef304e2db8b22d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZXLZ2511350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96725eaa9305944a86e8e94364dd41ab770a1c8df7744e5ec1b4a87fb5b27c8c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USZBG1116368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f40a39f1b2dcd414b3aeabfff781a3b237942395e13342eb2ac0dfcc0c356. 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/USZBG1116369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42c6cf305f280477bf1d91e5095e4f946713eccdb8e17ff5f949c3df5962170. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USZBG1116370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb940b9ec759fb0e14da60dda0d54044b43598c1030287d891c1021d8aa054398. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USZBG1116372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c4fac6d62d0c98bb5500965186be0b38f40d1bb3b9bb6832a19007b977796f. 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/USZBG1116373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aadc5750d5fc02545dba7afdda4911122acfe8dd464b2cb33bc741624a89960. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USZBG1116375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c42eb51f59043affbf5111300e802452340b61a9b8fd17f162bc551f82695d0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USZBG1116376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee7542ce1ee0133ece614a56995b90fb326bf768615d38ae039182103f16b3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZXLZ2511358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1655a9eca6adce766078f5e18e969797701ee126ec93f76590dc270a0561fbbf. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZXLZ2511362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820d3fe434012af017c6dbdc9e9d45c509f9236dc844a423ec2fd5253cafff9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZXLZ2511363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37f1bd227d691730e3586a526c9c97a7ffa8701531e1045213f4fea77f9e766. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM6DC1514037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736dc9648d464f65663b9d0062f5ce7d0fe02f435670fd976b2476638dcf955a. 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/QM6DC1414316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421bee676dd31dfdaebf0241ef380bd5811c5f8fb35c26199c4b00542df48d3c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6DC1414317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550d4089427d81d7ac7ffe14c5c426ed6cb63586b3ee6c92e509e921404bbed. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM6DC1414319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b8c234ab64b6e7181c070f08f8e7361fb2bc82bded48c16cffa0040cc1ab6. 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/QM6DC1414321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98a3ccae07d226f0f99e877436a15479098d8f1c45386d91c41d40586c40517. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6DC1414322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91bfb0e4046ef7446db5c051e77866a841b0d3bfe09b13f874837258ebb520. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:27Z), 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/QM6DC1514306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd70ed3ef6da1c5a8c011d95c08871bff445d7134b10ec764f146fc0ec2401. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6DC1514308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa481fc7018e36897eafdf53c1f5f76df8072113e5f182dd88eb07be267032eb2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6DC1514310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe653ab33ee59a7cdc67b8d3a902601c471fa8a28a8f074eb9f66118e845528f0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM6DC1514315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bad5e2aa4c8f975c6485d860157bb1981bd24808d839f9ad0ae25dd6cab2d3. 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/QM6DC1514326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cf42b32fb07abd4d984f29058bb3f3a8049c8a1dc5ef93fa49a4661a1c94be. 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/QM6DC1514330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f052282adb106ea2a11fefc282a234329a35d5cd91e46448c66726448678c. 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/QM6DC1514331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdcda1871886cd380ca0c5def8c8080f9218117a28c0c0550f6cf6d675a0596. 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/QM6DC1514304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df66878d0335616ebb45d8435027699102bc825a3e0e2b8d7863ff7c3e18b1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:37Z), 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/QM6DC1514299.