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 0xb87f7fad2d8e4296839ec18e9924e520963485878e97daa264d84528778219cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60022b4c-cbb3-4520-910f-82f75116994d.json and https://artists.proofprofile.net/proofs/artist/60022b4c-cbb3-4520-910f-82f75116994d.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 0xf50251c6eab99f69643e60b668329fd0063296a5300efa6d341f40d4ec957e6c. 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/US7VG2495930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f990bd0e61ba602e7f4f95f68e82d5bde05e7ea65daaced2a12aa48152a829f. 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/US7VG2495931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773be3541828e2d2d2e817a8a01cba8d9368c648517b8e30bfc7debc4c468511. 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/US7VG2495932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51b57bb8858e760bf706179e06d8a1371d632665f0e98c9961b7bc1149cbed. 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/US7VG2495933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd9891856f0e0a70bade98d7aebb87d1898e24535018d8c2e2eb63f6d464333. 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/US7VG2495934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be2005bb8a8bfecdae485c2e7dfc4dcdea029f0499d4ee1be1718df66bf725a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2461171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521d6f040a3adf49ffc60de4e668fd152212dc3efd0eaf10e367ac5587e08992. 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/QZTPX2461172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67ebcafb8f343899e31a116b9e9c58164a7fa81c053fa106000d11648553b77. 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/QZTPX2461174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ba56d4e4c1f92b1f4e1da424d7fcc868a4828e2343ddc2d61722c5622114aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTPX2461177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04d21d2d65c626704644e56736ee087515a8773a6e3e0e9f804beeb1ad0f0fd. 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/QZTPX2461178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e092dc57d00e6abded0c2be2a1e4b82b6ba00ff1fb296b4c3faa60f9c014af0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2461179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f4649d6d31e000eacdd39fe111e59bdad1d337bfb013cd4e3ab0b5461b91e5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTPX2461173.
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 0x58751ecc2300a2bef507266ba3067fa7215bfa55989c3e988616962984473dcf. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTPX2461175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e580b732f6d76b11c939393fc5c57d5f44ad3b96aa9604c6d925f32937a5a5a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTPX2461176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7ceb3e2ccf2f96d2509638c52ff2a4143f209961366588d9c862b3194482cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTPX2461180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43653062c8853234d437f9512c2eeb5d798bbab8a5c3a0963cfd83c52e84fe62. 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/QZNJY2229426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8bcbd22f021bcd39a8cff240141da0f41f8b7913fda114740b0ac910930115. 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/QZNJY2229427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864cde5cf2234dbc0ecb91c74298218a469a5d334e60e1a0f8627c575e2e691. 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/QZNJY2229428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a130f888a62ebea1d7aed19f3ed2b020323d977f3db9992e94aa4fba511679d. 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/QZNJY2229429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cb74d1019f66bea9013a5f25513af3c2528960fb5e31fca7f67eade320b696. 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/QZNJY2229430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203e9471ade62357a9295f6e04696d44cf3c2faa7b4905de93dd6a1ca2f0a1d. 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/QZNJY2229431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3868ddd177ef3baf65032021e0f3f30888843de8352aec79b2096587a1e8f. 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/QZNJY2229432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6335c80b0be4ea811f202f015fe8cc8711f9d51b4a77ba8edb72bf61d5ee3. 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/QZNJY2229433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a43cb027e8d63835dcec270022b1ce41a127a7c2c5f52e7fb5b4c009bfcefc. 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/QZNJY2229434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfa5f80d695b2f7c5b181f440d24df37b7b08b352a66b895dbffa40db99b67. 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/QZTPX2430687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb21885ef2a03f4a642f2c5e0078213039e9e223373fab0d2c849df6a1cacf6. 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/QZNJW2481930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eab8778c02617a761a1ea8c1b4821c614c1a635415c269fc3be5658dbc9581. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZNJV2487268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0842d07dc1e038f8117fca8d9a3ada0f98ef5bb7bc97f3fd90fc074cc1708645. 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/QZGLM2490790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67723652d5514a48bb5ba37c9b03578869c7bb13289573fec61a5011f7681d2a. 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/QZW9L2329469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e03606d56581e2a3a38c1b2bc78ea85e286c6bb37f22c44b1cca9f0b06c36. 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/QZNJX2310415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fec6cb9975968e05ae9364264f7f405a38cdf3db778bd2654a1011d0811e02. 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/QZ5AB2369242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb5f827d499d5b5b20baa823cc94e0c2f26c3616e1e83746706f691a48ee4b0. 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/QZNJZ2243592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75848fb72ed6661b168093008514073165201b15e76da716f7c0928dd0337d85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCT7J2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e32aaca2c977179c026d8c32a60ad276c375f9486faa83e70e5adc6552901. 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/QZNJX2271388.