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 0x7fb455d110a098ce177046103af68ea895752f8c3bc27988b000abd49e745a34. 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/3dfd448d-744f-4b8a-a693-2d6c8649ce71.json and https://artists.proofprofile.net/proofs/artist/3dfd448d-744f-4b8a-a693-2d6c8649ce71.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 0x4e3618ac0976f70bddfea601fa9e9d4da7874eaff961b707e5fa486fc9b3b005. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USY252318332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1d82e81d31953047d33afe77397173c1290fa774eb17b03e68de92d1052f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USY252318333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c7d641fd000f8650a062e81bcf54a30ffd22e35b0a43df34a2a2a728f6ec1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USY252318335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ca58d867eb79aafa2d14be5ba10ebc942cdf3a7301eb2cfe592be0da060e98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USY252318337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e22937b458fb87f90246d6fba291bee2bb0c9dde7829b7d143ceb117ac7ed5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:51Z), 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/USY252318331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d991f00751f9b9ad8b5671cb9ada4f00cf49830a6df46c71146e5b3333a843. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:36:58Z), 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/USY252318334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1431c08d75a4e0f108a387a8425aba599ce70b0de6bc505b4dd3413682dc460b. 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/TCAER2063368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03638e018736e99b76c0e644d796decfd237ff49ed0074013c2f6cbbf07c8263. 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/TCAER2063372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff994b1faf79a3ee1b8bf1ac573d8e45232ed6dce075f181c246ab3b7fb81932. 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/TCAER2063373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86ff7d9eee6bd998622a9c77f5d9ae703c58f0dc8c60366a51961cac9815a0. 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/TCAER2063374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba755f28b3413ef7aa63ab66b35dd9f5d3b545a9bcd4e6cb6e498eb7f6cb568. 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/TCAER2063376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3680b55b5ce60eb424dca9bfe9da6a667e3856ce498e3b9b5c956e52d16a30. 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/TCAER2063380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c87d95d9908a2a2eb0480f07e440b1fa050c94107fc096a7383b27177d8a07. 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/TCACW1773269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591789355a216c357ca0e8fcf3decaff1d821c171e09bef332ef5c6bc56d2064. 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/TCACW1773271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477736d43e72034abc052a69b057bdb8a038c353087df743d91a2b24d32d5b9f. 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/TCACW1773272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9b833485b3d600ef3803a9b7ad563df805483c04a3b8c2f94548306154f4f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACW1773273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ed43634f1f060edf44e670b87e66ea7bbe2471ef7219f862bf962ba318a8b. 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/TCACW1773274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed20197d9d639db1666083a82e9d8c4404746f9cd012cb8f18d0d10493ca3e80. 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/TCACW1773275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c37be79fbdc713f51dc282b674db1adda730c6a99a6f09cd1d06cb2cae6ad35. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACK1577391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb689a120265a36ae17ad6c799bfe338f066854ab8e3bf03b07c96eef1e21ac0f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACK1577392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fdd6dfacc30b4d8ff397a4acc0aef29a6f41fd5ce9451618eec16e25edb20. 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/TCACK1577393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be93dc1584fe8afd770f369cb27d991ffa3af6bfd514efef64279b3154acc3. 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/TCACK1577394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e2e417883cfa1106583c63687e694c14cedba53f4b197b995c407203477bd1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACK1577395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9e952903764b886f59b2fd56ba09988b38c8b292b9cef33ad5548202d2bfd0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACK1577397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd16c0a22a55c9d5d375f4c3cfddab4b08e276d03496076a8887638d7cb32208. 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/TCACK1583875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682ab97a0f201803b7d122cf9250e2bada81d30a0b6c1d201d47a11ddaa7826. 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/TCACK1583877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5569d6b6ae2ffc612d4571cfe9e06a08c3f0d2fe773edf414789ccf256bfc78. 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/TCACK1583879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93ab56c6a03e39659df4757c440724098c9018fd2bbf3027bc414c55f9f7da. 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/TCACK1583880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6da9883b68b151211c80a10355cf8f6c5e3e2e483135c5893fcca6c44758c75. 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/TCACK1583882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1d82e81d31953047d33afe77397173c1290fa774eb17b03e68de92d1052f1. 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/USY252318333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3618ac0976f70bddfea601fa9e9d4da7874eaff961b707e5fa486fc9b3b005. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USY252318332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe0a58289ed3cf739248b149983c0bdfb3acb098e28075a2a46470545f5b85. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAFJ2163302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b24e13f05b043a4c342a442ddbfcc3c8fe666bee29cd1b75cf2cd7134c9e76f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFJ2163305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d28320d536a68367a6cf36c3709fe78e21cb00e2bbb772499999c3a4fa03af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAEB1973437.