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 0x4ba91c3f56ff85699a50ccf8fda812113ec9ce7e4d254ea9d9624188a1ac397d. 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/ee4b5bbd-4bab-43e8-8966-f57ff9495a70.json and https://artists.proofprofile.net/proofs/artist/ee4b5bbd-4bab-43e8-8966-f57ff9495a70.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 0x28020c595f8103f796c8a475c1745bf7a3b684626d9fba335184b9427f7bfb7b. 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/KSA002370652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86695ae7a904ffa8c657e88e1ef71d97a2d65c15433c474dd218e02280d312d0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/KSA002370653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c99b02a62cf99680a4f713f59727f54f0cd96051c5bb27697f6ed04640cb5ff. 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/KSA002370654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb458a8dd630b0437c3a05bb3251a2b62d5db15bf00708711696b62b5983736b7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/KSA002370655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9a0f3095461a5783e973c591ba16ebbe3bea8befa08b40dbe9f2358277273. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/KSA002370656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eb3153f413c7060bd1df4fffc4929fbe902b74601bc6bd6df733c6fd8f4a89. 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/KSA002370657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7101388ad07f6cedb36cd3fb07e728af216402cf4f3d8019c4f354fa4b1ea6fc. 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/KSA002370658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe140aefcfcdeb7527dbfe0632e4ea0653615158869659f8344c39a3960302a93. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KSA002370659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8ae5399a952a7c0b6a71d87b48aa9c60f10ff12c3ca64411464caf701a2b4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/KSA002370660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a9151928895b26c92908e80d5e564224e780480a54eac25e9c5ff9226ff820. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/KSA002370661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66662abcd9495e87a6cafc1404c50972d4774fb3f1583f8c2ddf21e7101e970c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/KSA002370662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc9b9c3cb10eca78100523fce38d2921757f763c0dbae4e2bf0aae31a82aee2. 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/KSA002370663.
Hymn 1 Praise God From Whom All Blessings Flow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf410f89a556266b6e28cfa3e36f982a44b714731ac8bfce3ae62fa754a60c8. 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/KSA002471445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87417397ae994de45e592d4e439c2e13e32cee248feacb9a31bb46bc087d5bd6. 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/KSA002471446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357cd18b4a4d9584271e2f53933c8776961f4761ca08dda83fa5f0de17fc4f78. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/KSA002471447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d9b7d8a356627c2de97d4f6d912d4bb5f54549621a19640cde96b21c6cbae4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:50:35Z), 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/KSA002471448.
Hymn 5 Praise God, from whom all blessings flow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbd16fa6414dc97b9185e9a241448c9a57ed9d0d6d3d9da5d2ebc8cad4bbb9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/KSA002471449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0018867902c57f6569f738c779a6056b35a7e1c4abe2b998ebce3bb10d6fea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/KSA002471451.
Hymn 8 Holy, Holy, Holy! Lord God Almighty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858b5c0c6a81ec58b770cf9814df0d9c51ca90020f82c08af250511c20d8d0bd. 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/KSA002471452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafccafdf8bfeb165257f2544b4a6484da64fa567bf2c5852d56d8508f726e33e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:31Z), 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/KSA002471453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e44bb4827f41f45560a5a7d8fa52a8d8d586af32595de70d58ca31d8f0a33c1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:22Z), 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/KSA002471740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1d18193d6d5c8327cd4d292a50170c805716f8de911e1dada851320fa50c60. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:08Z), 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/KSA002471741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb230b29a750991a7409be297335fc022090251f84173b37e9a9e742d7dfa034f. 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/KSA002471742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d880ee74d58aa4dc147234331632e4fb60bf7cec5d9191fcdc63d6fe45d415. 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/KSA002471743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca3f8c5703c75efbedecdf81bb37348344ea9ba4ef793033357fbb62e13938. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/KSA002471745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90cd386fa654a9546ebf9f8286c310413c58cb3b9b45168bc66dd5c7484bf83. 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/KSA002471746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943def3c8c36eeae1bef148a14c6c4ce7336ccbd6e98b92188f307822019f9a6. 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/KSA002471747.
Hymn 19 Hark, ten Thousand Harps and Voices
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e221b848e105cce775e66af80302d4957f023104d99e9ddc6e1bf9dec256f06. 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/KSA002471748.
Hymn 20 Begin, My Tongue, Some Heavenly Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025e28858fb6b63a76282ebfd760b5f822a588ccb79ed9acc66c58e97816141. 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/KSA002471749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78cb9b19a4a4448a675b3314bb93add45bcbba7f77031082f2f2c5a9e9cc9a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KSA002583791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a95b6cd8a6697ce989cec9ff9e2b184cc9dbf1a4b53fb5c12182b19b871ec8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:52:43Z), 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/KSA002583793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaef09c61a6c2cfacce3405adb1bc8d5091d7cf778808e11df71487a4270a1e8. 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/KSA002583795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d12e73b408ddbb3ff3dd77fadc76f061510c4d9cbc628c80d8f8b0be2db77f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:30Z), 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/KSA002583799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0342037d0dc40810d8a0386cad90bee7911762efdce2b60553f349eb35efda. 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/KSA002585178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9c3b09a73172cc72912fab22dad72e48d6dfd0c71faf58f2746bfb3395434. 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/KSA002585179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f31bb334d7cb93dcf1702b35d67ade300954e67c054d66cd36e64be4dfad4. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:55:50Z), 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/KSA002585181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632efbfa809202afbd7025eae572b3b7b233410314880532409409424bd772a3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:14Z), 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/KSA002585182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3044858023e44ca2462292f5c75b5c415af6e51f3f54f4f350daabb9f3c6a0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:01:49Z), 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/KSA002585187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647235928709c3208d385d604e102d414357c298c203613c7df3649279870811. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/KSA002585863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8087c89e5594f6cfe4abac1ee6e9abaec103df32bc065a8665ac24695874a83. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/KSA002585867.