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 0x5499c9d7c5480382597ca582b6bb09a9e39d62b6e164ab3703bec2dd972d59e4. 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/491a0a74-66c5-4ba0-9931-81066fcb4bf2.json and https://artists.proofprofile.net/proofs/artist/491a0a74-66c5-4ba0-9931-81066fcb4bf2.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 0xb66e1e792a132c7f9097b4704ac202b8ec1cf03b2956eb8a030112e7e5498006. 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/QZGLS1946325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ed6a305d6c5c284a28c9d7f1ac17112fc3c27c909983718241d6f577370eb. 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/QZGLS1946328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20178c446b622b59a782bdba12434cc8b38f60f836d967d367a5d55c09212927. 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/QZGLS1946330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faade3c8b1385b28357e2e060b804003e326b52f92def0a329b6f71a9e302cc. 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/BRS6Z1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2dcca50beff68bd506e5764a5f694b74f61c3cc93429d4b244e41ce1d4be0a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BXIXQ1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c16b524bd588f984616a47900457240a5590e1e65a0cfc2f98538b97bf082f0. 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/BRSIC1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1bdb136fe87adf6d92661a6fc1f0ee891b51f405a30050c741a905cd55a00b. 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/BRS6Z2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ae9043d20a21fbe49305923450d66caf42f181baa649c45be14ad600883196. 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/BXT622000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf5e4755c5f2a6309f4288be445016fe93bd5a60e694be535a7f0e90fbfb0e. 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/BXT622000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f4c5087b88e869440c1115431f1ec0ccc4306b454af1e6984d42f9d7febd5a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BXT622000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2598630e70e95d90d6da5f87898b23d35c46bd19794896ccdd86f0fdcdbac1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BRS6Z2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd982e45fa8389ac8969375045feca197537274b644b97812b2dc2d3013e15. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/BXT622100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cad5952bac27e00d5d151f684844bb78ef03446da2bcabd06839bfed5d080d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BRS6Z2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2403978b1600182210f530a52a4116389f4095368f0974ca5b2c815b8874ddef. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BRS6Z2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bfca31df76a7fbf090e29854abad1dad356a6bd4eca6836724b034becefd43. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRS6Z2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9c8741a2dc1b6ed96d2fc31f571c21a0a4d060087af8b2dc4fb7f2d20c3b0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRYS92200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4f3960aa5e54afcf725c59c602be56ebfbb088d6a6d390e1909528d07ec62. 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/BXINV2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37e753cd4f96c6eccc553fa62926a96fac731740cf71b4cae7270a19823544. 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/BXRWT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2557ed7eadc61f26088a1a28743d13450dbe84e777276fad394b5871ddc91ccd. 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/BKYMT2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa71930f20f79438a64bff6599b39979c8622e3949a3fd4cfc1f5fa3c5f4a159. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/BKUJH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86086fd308972826ac8d2728a0fbb0f2847e0c46a21aab5dc8300985d9f040c3. 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/BCK2Y2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a8d92d21710e518dc958b244f2cf519467262467194e4ae09ba9c195b06bf3. 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/BCK2Y2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9afe542f278e38078f72ae9865028bda0b766b0709ea8a062a80424edcd7ad. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BRZ3W2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9372464fc0833d5f572c242861a2a3847eb09c5e4395e39ce8e926d9f1aefd46. 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/BRZ3W2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0957746b137a1fef2f043f737c4c0010260f0163468c7e31b25d1ec5a75dcc. 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/BCG2A2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7def1ff0b30bfc7284b331b06e1288f86e4e634cd97c1a469a0fecf2e4c4448. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/BKYMT2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bf11b940dbceb57b2727c7001750523053064912a619f627604626d046dde7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/BKYMT2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c688bd7a72445a0b13e1968ad7e3e68efd207d35a0ce51ff80132f936de8f48. 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/BKYMT2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d46f7f4f148e723d50d8d9b349c8b62d1ac810679d5e635ea633408b2ea62f. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/BXINV2500046.