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 0x0e7667b5081c3261bdc33b76e10cc34c76f7a55b4a1c8293b02369402fed36e8. 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/7b4a68ef-9abe-4efd-8175-17d2936b26d2.json and https://artists.proofprofile.net/proofs/artist/7b4a68ef-9abe-4efd-8175-17d2936b26d2.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 0x6f1df443cfbe3cc628a2a47655ef4ae72655d8766e575006ed9f8a626251a054. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZNWZ2239034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef03db43484c5365d0ca2278168883770498573b4cad969be9bf47031c100039. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES62313180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa858f345c349004ff7ca2ed3e4b637f02fec854c65d1bf918cf414b4081cba3. 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/QZES62313181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c27f4cb68e9ff49a9a4b1edc8bbebea1cb7ef96d70bbe72855a35bfeb537cd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:34Z), 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/QZES62313182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a60aed869ec073ddc2511dad40c50f598df50fa39266ff2ea0a032c9027f4. 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/QZES62313183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aff32630650b74a4c1ef0d3079b8b4b47b9b9bf62f2c42dc4db0ac3f34c5d9. 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/QZES62313188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529e977560a47530eee3809e8c33e8b5fbc0ac11ed9d6b33072be591895e3ec2. 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/QZES62313189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb481d3f069052ab25ca9111903d5c88d0ea8656bc318a639ccc1d176a973638b. 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/QZJ842400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbc5ec8c75c519ae05197adc783188a0a57a547360114b6abd240ef4e818f06. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:13:36Z), 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/QZJ842401667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7b1ce59168f0720d9eea0919814a6cb5883ab3e188c036660d3dc2f5c7bf8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:41:51Z), 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/QZJ842401668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255a920100bc8ef30a1a5a4a0b0041ce5dae7bcab81350f34c9cc8bffe6d56c. 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/QZJ842401669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d070e3b465dfa79c4ce84dfbacef07539f29b18084b0ee1842ef3c0a761dac. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZJ842401670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f93859e9b9cecad09da54591b939268786f744559aa9701b78bb1d2aa77981. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZJ842401671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3c0b1132c8b52ebc0df34cd5dca6a52f1ff3c985f563aa04e19600a8babd1. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:05Z), 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/QZJ842401672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91367acf522c4e4ed87b1efa37eaef4f25454585ef7b0c64471ebd604fe63d18. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:51Z), 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/QZJ842401665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f815176f404ec3de6240783036872906a3e19062ab200db3b3b9378479acf. 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/QZJ842401666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289107b578420f5c98691fec8cdffd39d7dad9f7f39473cd077feef0be9579d2. 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/QZMEN2382397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb481d3f069052ab25ca9111903d5c88d0ea8656bc318a639ccc1d176a973638b. 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/QZJ842400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7b1ce59168f0720d9eea0919814a6cb5883ab3e188c036660d3dc2f5c7bf8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:49:40Z), 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/QZJ842401668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255a920100bc8ef30a1a5a4a0b0041ce5dae7bcab81350f34c9cc8bffe6d56c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZJ842401669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d070e3b465dfa79c4ce84dfbacef07539f29b18084b0ee1842ef3c0a761dac. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZJ842401670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3216ebeee76adafca430572cf882a6fa8588242bcaac09b6551990bce2289. 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/QZHN72244281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f93859e9b9cecad09da54591b939268786f744559aa9701b78bb1d2aa77981. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:25Z), 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/QZJ842401671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3c0b1132c8b52ebc0df34cd5dca6a52f1ff3c985f563aa04e19600a8babd1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:41Z), 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/QZJ842401672.