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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb13d6e4bf776c5230270ce710317c54e73a764e5a05b8a61b42ffe15b992aa. 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/7a616b2b-795f-401a-9910-9986f7ff1e08.json and https://artists.proofprofile.net/proofs/artist/7a616b2b-795f-401a-9910-9986f7ff1e08.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dd6a3100d87cf3aa8be474d12c0ce34f1721dc879f518541bf962a17db7e9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHZ62258487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dd6a3100d87cf3aa8be474d12c0ce34f1721dc879f518541bf962a17db7e9. 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/QZHZ62258487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708579c696b57c45e49fd8fb53a05562326d9e9b1eda9a6bc95eac3f325fa531. 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/US7VG2302843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708579c696b57c45e49fd8fb53a05562326d9e9b1eda9a6bc95eac3f325fa531. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US7VG2302843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27862668fc3b263a362fbcf91f26b07d94e45d7b37d9dc7698fce4b0025ccd26. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZMZ92396910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691dfd4026e869aa44d52e55cbeb918e3a6c3ecf882144fc46949698f38c7653. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2309399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a643bf39bc320b79723d3ff2718ccbeaaacd894649262e7cc94bd05510c9931. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXIV82426087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1da378b215fcfdbe8d443f25d84f594566375c613701f903e3012af36f34e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXIV82467340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0fcff46e2acda5c1849caef06a44e5077f4d1e3e7f364198757c364b4a4e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIV82436029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc4dc544f24389e918018555b3b3a3219d300c83942d07844ecfa83ac932669. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIV82470248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20d7c13f065b304a6ca4d80d7f50cebe660d0988cdde27c2c8fe19e8024418d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXIV82443685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6815064bb0ca51d22937775bdecdf63fa115c44cde3d8e95aa5d4dffbcb0d622. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIV82433107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b32c06f600d0f16aa4062ffc20fc13ec5d07de029105d0142375f3e612644e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIV82469047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20d7c13f065b304a6ca4d80d7f50cebe660d0988cdde27c2c8fe19e8024418d. 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/BXIV82443685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b32c06f600d0f16aa4062ffc20fc13ec5d07de029105d0142375f3e612644e. 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/BXIV82469047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2dd798719b352484a14efa9b6cd52b64b2a3538b399bfeb0c6c3a554c9e0ab. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BC6M22506128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab067ad49e296a093ec5ff19893dca8a1cc2849f2ccd791c180d2b38a666442. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BC6M22506119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04be0bd4e0c03fa6ec1b150dda107d3741f6e88def0831235a7e508983a527e7. 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/BC6M22506129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2dd798719b352484a14efa9b6cd52b64b2a3538b399bfeb0c6c3a554c9e0ab. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BC6M22506128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6aa6d9a41a3a06d946e86dc4b770fa337c4e18ada851c3c3b08184bbdced98. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BC6M22506127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ef1c4d829662966c77b40893383aee38834a305fbf7c0a068e4c35a8edb260. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BC6M22506126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9e2d18c259f29e385f53646abccbf2486ef39520310b0de9e77ca6caa59d49. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BXIV82402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dbc2142f1bb06c7e8ef2f96aed02509b18f77ae56ef1529418c49f6e310261. 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/BC6M22432255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3571e3329db5d0f29dd70d9106f429952105a98f744e8c87fffeb3e6692f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BC6M22506123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e44f06c5351804b2e7e45d182367b30ab1a7d9572bcef3f884ce2b63b11f4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BC6M22506122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537bdb34f0e8ca173ce1adfdb0e3c4f6abf3044de62a382fbebd1cec94841146. 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/BC6M22506120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab067ad49e296a093ec5ff19893dca8a1cc2849f2ccd791c180d2b38a666442. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/BC6M22506119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b184204bfc2894fd417c673916b8c7fea3d3b2606a3cde632c82d504de2eaa7. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BC6M22506118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82ed58996933f69170e9d6290d87d75c1718420b42d7d002378cec136d7115. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BC6M22506121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e44f06c5351804b2e7e45d182367b30ab1a7d9572bcef3f884ce2b63b11f4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BC6M22506122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3571e3329db5d0f29dd70d9106f429952105a98f744e8c87fffeb3e6692f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC6M22506123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ef1c4d829662966c77b40893383aee38834a305fbf7c0a068e4c35a8edb260. 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/BC6M22506126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f519d99289dc41aa535b56cccb7dc19c74062370d1878292d64ebd4b727647. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BC6M22528912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba82b486f544696249f3f01dc0add370c417d7e0857a1211638a58ac3d18fd6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BC6M22572536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43064bea916d05835be412a876fcb49891cdd3d8866cc55654f2f49055909b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BC8Y92400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c84ca910fc84c24d77069de376ca7ae4385c475c45ff5eaf9822dbde81cfb38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWFR2313237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20470874f35b00cd96c75394cdb45158d0db5f311aa1557968f0ba5c543911e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIV82495281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf6e5f70a7ef77aeb2dfd9ab1db816e9a074ab515bf5431db65ebca95cda06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC6M22413112.