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 0xc93d29dd495a86e3b858372f552441b65b85f40e0d604df85d4113462dd19a45. 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/3874524b-e3d2-4197-9ea0-4b568f193929.json and https://artists.proofprofile.net/proofs/artist/3874524b-e3d2-4197-9ea0-4b568f193929.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 0xfe50c61bb472c7f425a2e7fe8f746e665121b700c0ac23cfa00c81f4d727f254. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHQ2301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12e1aab4bd0cd20d835c543bcc2fe9443ce24e6342cd8f2f0abdbe0d623b52. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHN2346249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e6ca88a0ff6065c4c59d919d63b7f225763f13f78d91b9dd94f16aba3fb61. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHN2332997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc4afd931578245fb413581dd17b6f4275c74f2dd64c3072cda3c4ecff68f3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:40Z), 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/TCAHN2332824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710b9a57396f765524fa200fc7a9c4fc570feddbcd5a3adf128433fb015cca63. 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/TCAHN2332936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b632c7fb5bec2faa7a81e1ce70c60155304f116a66c735723723ad0e4cb1c8. 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/TCAHN2332893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5447b7892456e84d04f27535f090e3cf7a010addb0e07be15bcdc0a080931c71. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHU2419101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96741e663e362ab882a9bad201fa2feb401ee7cc584199a8af65a5d257ccc6cd. 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/TCAHW2471882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95563de50ce7c61e177345438dc54032a36dd4abd8c3b798537b144fa2e3816b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAHW2471553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63306e1ca78458f3a366b78a59e16a0f7e91fa83cbccd4bde497023edf67a781. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:46Z), 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/TCAHY2444846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f3481824f394c95ec077f9c200ebee770709abe51082a637e383b97366d12e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHY2432747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172e2daa64aead4322a4d489ca4a8cab6e259b3dfb02234ac7fb569d98c2f96. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAIA2444669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d11340dadc3c0d8335c4a455522dce44c49ba2b1b18ea5efb1e6a8468ac970. 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/TCAIP2431668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01915f990ee73abfe48579ddbbfb089231e3200092f2430f75c27b6fa207d52d. 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/TCAIQ2431323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6bf26c076652f0a7e28e4feff9d58beb46cebc345fe679d150da2840a5f36. 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/TCAIP2431350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb7a1a135d36148ec95dc150f371b351aaa3baffb19bbc1c584abc154829c76. 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/TCAIP2431373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2e043bdd5ac4a8dbe5236de1a3ba148e781172a99032d071d97775fa6c365a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIP2431430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1250ddc17047b487683436adb3b56b6601ff9819cd82a09ed6c586d9ecb0727. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAIQ2431687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c522bec2cef0e1818278a0e336ccc78fa5949cbab3c7f28926da028795e7ba2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:24Z), 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/TCAJE2519919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4591d8b03286fd4145b90919bf9595f09bef12330693bfe876f312a3073f9b5c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJF2553057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e169ba90080af563ff15b28a186437dc04d91d09c17fd8195fe693644241d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJN2534863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a8a9bafd5b796d2f25695209fa21cbea1ed9491ad4487c4fa16a058bc3c62. 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/TCAJQ2504282.