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 0xc618b3487cc8fc4e095ce95b3b7a70f76405fccf5e169904e5061ff112f30696. 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/86ded654-3ca6-4fab-ad4d-2eb65014e3ca.json and https://artists.proofprofile.net/proofs/artist/86ded654-3ca6-4fab-ad4d-2eb65014e3ca.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 0x6b1776c4d35b327ace1babf72ed596f06f4c93823a1b52c851530978d0ae033b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MX5061801792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434c6d6bcc4068ac94df40eee91f8bc047bae998bcbd670b44d65aea092322dd. 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/MX5061801793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2903fd81c07f941e19b4831e9731001f22a51ce77d7da1a5856dcc418642d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MX5061801794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e20500c2bd8956e78c33f7d4d551fa27a2d8cbbc6321ca996495809ee9144. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MX5061801795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe484c90445bf7deb4456508cfad889b72698a0a598e5b510c39bd37b4f314. 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/MX5061801797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52854b1091d7718cb4e774e07343315e8b9442dbf75deaef80a90c9f4d8f0ec. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:10Z), 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/MX5061801800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d74a41aaa9b2bec0328a54748f8f861450990867effbdd5c3316ebcf3b6d3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:29Z), 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/MX5061801801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baeab6356d1527d5a18fcfe4de926aaa53263f4f41f3bfe01db1eda4bf105e0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/MX5061801802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9bbc7a54f812463762fae42cba54524afe007e316c6b6096f0e6f21a4b3bc9. 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/MX5061901877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba7207ab4accd7b5ad80e9e02cd27e45f8a90932c930015d7f67e4cc250d9d0. 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/MX5061901879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631bd60c65ecdad791d9d38b757e096dc4558bb2a0c925c91fb772176d6cdbe. 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/MX5061901880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3f5ad6d5d4001f451acd40177b8b683b0305ea0279ba14841015e7b8767bf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MX5061901881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d106e0f0fece908fa15bd53e70d0f9b59183eb305995f427b6c45749f9aa0de. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/MX5061901885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957008e242eafc89196a80f1c04b79076b2420422c8d43549578b8fff65b9181. 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/MX5061901888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533265272bc06298d206ce73773923c9df260ab813cb090059a4d76e9099ad28. 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/MX5061901889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055b8d239c17d6ee25363d4f9194c3c0363c5f8243fc599ab8f5bae8cc65d2f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/MX5061901890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb36323b08f9389d89894c9ff8d805bfdb37daf53ba4fd0536f46cb3785fb124. 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/MX5061901894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421517e7cf9dc69f6654de452859812f739c7e359a5cf24538456dc9ab7a40b6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/MX5061901867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a2b366d06a732f1540bba7f4fe264a3627a864730ccf1d2145ddf6cc380f55. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:58Z), 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/MX5061901868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849d6f43727a10c23023c0724033442ed19ebb1d301ab6ca6e2756254821cf1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/MX5061901870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3006f84a9b0d9d7e7650e715423d3ca744923864f6d81cfba3d47f87dd80951d. 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/MX5061901872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3d94969812f3f1c0ca1a3968605a14e4b02cbab8c1a8a3f4081733b158a486. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/MX5061901873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b205b5de6f943f0e8998d1113d9c5335e399a35a85c2e59dad735a0ff88e57. 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/MX5061901874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc140a1baafbda4cde1b4433650404048e6b90c64df6f2eb3357b17c010bcb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:50:10Z), 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/MX5061901875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55609ac07b05f7de100b7ace7b25231fa4cf38b602da217462c8d9e869980c7. 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/MX5061901876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa302c59c009638e5572632ef28368f88761437053496a8d65bb9acbb142836d2. 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/MX5062002006.