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 0xdbd5da224df7312b382ebe36ebfa861ee3a6c36208b77418d9ffcb6443ea0f0d. 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/ca558c8c-ca40-4b42-8cd6-121b69cd5b05.json and https://artists.proofprofile.net/proofs/artist/ca558c8c-ca40-4b42-8cd6-121b69cd5b05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Woman of Ireland - Traditional Harp Music
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 0x649d71e150a1c068baee169977c0a40ac513c8846bb3b7cf4fe6782120419113. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ITO101055629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16745f294e811517025054826ffc96958e87768524bc2d7ed52dd9a4f45144c. 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/ITO101055630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc614c417a76986a9398bbc47f02d494ca566a6b059d616f9feb4fa4a0e171. 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/ITO101055631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc049651c922c1f04ecfaaaedf8ce334fb20ca6279aa30b4d656d7e2e1fd2c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ITO101055632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f85394a2bf4b0f1b58b2d78c93e65458b0fc6c00f580d72b1ba7e945802009. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:00:14Z), 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/ITO101055633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f63f9173f4f3d5ca9f43fb69ddfccf304665d016fee9d39eacf4c1bee62313. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:21Z), 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/ITO101055634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb333fcc6dedb184bb85c99bcf9f30a5a20f06848a695c9fc5ea0f4b732450dbf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITO101055635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ac4e082ec30a912bdf01c04328e12bdb3171d2a67a65315aed834d4a84693d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITO101055636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33711d78862fb2c02aa25417edc85bbe3fdb40953681cd9c18701a3d05317f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITO101055637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5232be768aaca829a159e7f82f3dc20a838b806b26d9e648f25820cf4f7b3271. 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/ITO101055638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0debfd0ddce6720c03c26490d43872205a82fb40370d367c642c6c8057144. 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/ITO101055639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4acc72542dbc4b70a330da432605f2a3b3f1b4a60d2c4886c5a41a292fc5411. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:45Z), 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/ITO101055640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57705716bdd13f63478a95d57f5b0677f077f8c30e8aac062ab3047755417799. 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/ITO101055641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce7fc1a628dc594e5683db4755a1ecfbb2da1cb38b9c9b8c3338d2d3c96e810. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:58:35Z), 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/ITO101055642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada18792ab100ad3a122db0eabb98891e29ce2712ed3f4f2861fce5b680a59cf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ITO101055643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c781ba601ab97487cc1384b267f9b39650e639ae6b44ea512d45ece08a55a27. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:28:04Z), 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/ITO101055644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551c01b7d0795e036300b852e569cc1be45eb5d60bc45a030f3506195642652. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:31Z), 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/ITO101055647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd71f566a30bf0b82dd92b49df5615abb607997e212f1f3ee1cd3a265303cf9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:20:40Z), 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/ITO101055658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd22c19ae20f059eac7b58af3c2e9f3f4866848013235d91ef8767039d93e112. 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/ITO101055663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568df75f79f2948a9f866f31afec43529402c50dea11fe09a5dfccf852ed1244. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ITO101055671.
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Let the Harp Sing You to Sleep and Beyond
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c914eb661d36406864fc447adee99569ea72c299e8dad7c4c7ed8f2780b0037. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GXC5E2300856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72680bd50a49d939550e24b4ce6e4635bbb6fbd99c241d6c2cca7438f8cd120. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GXC5E2300841.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch