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 0x4571fa3244f764abc809e3ce6491da1483f55228f9b2ec7890d7b5c29726189e. 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/da192c4c-9449-4173-b00b-c92a05e8843a.json and https://artists.proofprofile.net/proofs/artist/da192c4c-9449-4173-b00b-c92a05e8843a.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 0xa8a8870e68d178dc762f07bb3a81a6c507f6ef6d2f85e704e390f680321aa162. 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/USHM21106621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3b0e0090e76fa10401055de43830b89a070a8538b7b53899cd84afbc4f3e9d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USHM21583872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0377485e4debbf90140c749fbd31ee8d9baa4b15ee451e54852e2a8d48a63a3e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21583875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39f01aaa8450c39d209bc3782accdd4f351609092025e0f514541c7e10f9e30. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USHM81513258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab967b0200cb4d5cb39f77d2be0b3f7df67850e84e11b96d4579c164a5a66b78. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81513260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2090b697010caa090e62a5733a8e3020198dd06bcecb58b771c11c87a9c06adb. 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/USHM81513261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c705f75d9db05faf4b14425da99e9aab0c9c91255d4f40a31f356540d5d5a2b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81705345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310ac68fa071f737308250eb4e17d507a3a17b8a664f5d886fee269052e0c16. 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/USHM81705346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058fe0068bca21ca41f268f5acaf8a64c6be9ccf589858e0a1a7fdc43c0aadda. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USHM81705347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfcf98bfd6eceb091d9f9f59c8403487867e3ffba34a3e0ad30230f72ea7d80. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZJZC1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dbce2c4438a3f7b0e99d5a3c6a75ecb306a3e81d7fd91134cf092ef5afec76. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:44:19Z), 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/QZJZC1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55228bbc2ed8b790f00d5804fc24cf338e1cb8ee2a5a89e100af653402733ef0. 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/QZJZC1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce20ff4df4d0ceb94c355e4c3a54a669c591065e4a96de644c94e45b1d6aeb7b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZJZC1900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d866bc9a380a25f95a026c3344a3578d1125edf3ab29c01d3b7ce682f162f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZJZC1900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd24c0bfe939ca3cd81f2a66ecbe2fb073afeed20ef49bf9231c1b50dffcae. 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/QZJZC1900259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc07d38d6df545979e67b39afef451766e113573b48858b0ae6edc99ee37b6. 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/QZJZC1900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7451f6fddefd62d8a4f2951929a3d2b117408db15ba633b14810c2176cd90281. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZJZC1900386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa64d47d7f8ab86aade85eacbb441af4ca063b790610c4aba07e84bb367ae9d2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:44:46Z), 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/QZAKB2152453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b49c1fa7f991c0426ad4494821d5f6a041872a2e39fd420a3f87d9568688d. 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/QZAKB2152455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49e38111bbb2013f81343fd04a3361630ba7cc07b88136fae75e8b5003e0be0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAKB2321874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36591a6a7952f903e033368b95961816e78145c54be370260940142fe5b5e433. 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/QZAKB2321878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc970a585ae33fc7a1e934a81e65f1bfc4092d92b80973acfcbb7ed5d88f478. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZAKB2321879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfaa64c9c00457159f6acebf90448942bbdda153e1ecfd22375e0e10c646367. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZAKB2321880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dac0270680d2ffd87e59e9e6b9f4be049718cf93fec2c6307d7e6e0b7421be. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZAKB2437669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcadda4e64e889d1cc8cbd0f1acc768712f695cde70d9137cb916e2461f4790. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZAKB2450074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dac0270680d2ffd87e59e9e6b9f4be049718cf93fec2c6307d7e6e0b7421be. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZAKB2437669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe588c313bf9f59bcd0f66dfec6fbc8912224d6ffec180366c4e160fa44b84a97. 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/QZAKB2470715.