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 0x0eb5d6358612e72c67b0e8688e78b0c5e1145b4e6392638b398dd16b139704e0. 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/42a37cb9-15e0-4af7-8d1d-69f23a969e35.json and https://artists.proofprofile.net/proofs/artist/42a37cb9-15e0-4af7-8d1d-69f23a969e35.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 0xe1f2cbc67ac28921e0b2d790b3c30da5cf75ff7ec892ccb1ab275505c921eb62. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTAU2467014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947c8a9085f2365da945abf1c6f776d7977a85a191950556de14c4e01e0e7b0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6H2223642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c37366dc8167cb741c8bed77c479e7f265e4a64f1ee4ed16516fd2b1f7c6807. 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/QZK6H2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699a721b6da0d2c70035242cec17aff2112da16e01d8aaea6be157ba5ceec178. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6H2256431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c9bc7ee9784553b56738297e7e193914eab4ea4a508d6b3e7e6e1a55360a80. 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/QZMER2233423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e81449eb7bf2078414d35d945a92d2f10921d6c14a54fb2944092d15aabcfb. 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/QZNWY2214845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de0bc163f0cc10453df22556856017aa3a637be5ef3a763c4e75ee2d1627c4. 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/QZTAS2230196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833e9e2b85648e8e993c349c098cb8222e57641aaec8b742c9a1ddd9f53c76db. 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/QZTB22272541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e46939328a07f5e87b006b02103fa96d21d47bafce0ab998acbc3c949eb594. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTB22272542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc929c5d27421bc413167eeb37a40bdd143a3e449b7f22b917873b763eed17e3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB22272543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47f6eb5fa2f7ec966f0dcc22b9eae3a9ab758093475802a7cd93de3a0b1e6c. 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/QZTB22272544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012ace2c46a32f6c978f2b99a3f44a6def8e17864a0f0858da69f6320e1a5d6b. 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/QZTB22272545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cef6601d217502334eb5f98b05e4186ded11f07a1380eeb48e8a8f7419d1c7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB92255366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e7e94b9cc10c68fe4791c4bc37bbd59b31f3fcf7db2bc0a79ce447e71cc237. 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/QZTAU2467011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b67b50411e717858365ed36710db58508e6579b23aef78477b171b2540e5bb. 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/QZDA42350968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f837cac76f87694e454eaf47fbcc8e19450c4093bd7e3cc57b668ef65f111. 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/QZDA52316538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c6bc9f70c61eac54ff2db4267887117e13addf502d630bcb65f895c375fcef. 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/QZDA72361570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2efd2125efb60431a603412837493efaa8bd8f69e59dfdf52488663c0a71da. 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/QZES92310115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d7693fea51369b68c10041ce2f2d2096a6f8f036c9f0c3303e2c7d3f30d97. 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/QZK6Q2378786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dbd228263119f9e1adb5fe712dc637e415a2c9c89eaadccf5db46c8390c08c. 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/QZK6N2388530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f5f1e73d8e6a4030f2c44b20fb96713469e663cc85b99a2fb6e196ac80efbf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNWQ2338202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd24b7ef7ac2eb2ff88285de7cb0863e368ebe2d1b02871da469230c4851150. 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/QZTAU2463855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcd5b12d9621c2c707d76debfc8105f3df1866d1fa556293bc597a4d0f8e3b2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:00Z), 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/QZRP42389120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ae7232a2761dff4df855d4fd6bf640111940664177717364ed2074f03d2a72. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB42357677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4195ea7ddb3d87da53bd4c741973b09990d0aa1154771af890277853ce422051. 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/QZFZ42497892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493706a8547553a99942d98c31afb0cce7cdfbe2bd2fee9d63dbb07f773a59e2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTAU2467010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8002f078bd7ab30a226f48fe9f4e0dc449586a56691d4b9bb2aca8d51b635aec. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:18Z), 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/QZZ7W2411108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbecad05a01a1af3e326173ba50ce80ac99662bf75d0bdcb72491b31e0c77514. 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/QT3F62522271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1fde6ed9ed893ddf1afb3c0fe01c2f9c3ff8a4a6d7df0516b1423900afd148. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHM2332177.