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 0xd48a524efc12984b6a8e78be7ea59f5aa481c154bcde1a9a546d07ac9db5ae30. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/924e67d9-cf3c-4eea-ba09-080bd07098b8.json and https://artists.proofprofile.net/proofs/artist/924e67d9-cf3c-4eea-ba09-080bd07098b8.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 0x5025c1e62d7c3c4ae691c0bf83864fefab14907d1b14ccadc1c6e2610a004c6d. 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/QZDA51903988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22344023211f04ef8b8a07742f9a75437f1f24027a7b4d4c4b6e61098150ef50. 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/QZDA51903990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442ab0a575cafa1e06182fde4428369f2806a3070a6781ec9815b3da9f17cca6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA51903991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056952820c767c9eddf4068eb0d9f2751beb46ecafbeb726ca03b1914274dd19. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA51903994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4c8523bead5c96c9479be4cbda1e6a7ae288492eea761ab03fcdfc2082af5b. 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/QZES81978903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7bc3959a16532a9c4dc5af20634674e862797465ac8b682ff8c66690bfa8ec. 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/USANG1907236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b021f13ff3d49dcf80005fecc042065ed22182e139b6dbb3134c690777563b. 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/GBKQU2139055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60b7f8ebb9859a59bc141d0f38ac90af3f56092d43b2e9d20052a460a8a8d5. 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/GBKQU2139057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7410a37c59d05bf161dd44df4a501701c304156724ac4a38793bc06790a1d5d1. 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/GBKQU2139058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee29483aa3bf7c19ebe7b430e7f81056a0d13e8c880fb2cce5792a1d6fbdb6a. 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/GBKQU2139059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1149126b1d96a9ed909b71e714834678330a4514bfdebe55d42569d3e840a7af. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBKQU2139061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7efd53f969e5fe9551f223113eb7a44418df8ecb3ac82886a149504b66b6543. 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/GBKQU2139063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9137a6b4e6a1bef34f4d988d1d2ebbc0edee2c18d6516a6d29b5d287eba919. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BC3D72100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06276f4381e869f174a4ae3d8c8bea5f3f61b6c1d29f6ffd0c791404384724dc. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:06Z), 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/BC3D72100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e4ad208c53a59f074f1b565fbe67f1a61951c7b87d41f99ac61668d9045541. 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/USANG2252601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26ad412ee82acf277f113852b9c1615ab124c664409c7bf9d4410c3e11fcb0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:31Z), 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/QZWFR2382365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe9798e55c09691242a1627a600d66e423f048fa3b5d67cd56412ae6a3344f. 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/USANG2470117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1803492438e38d85073902079f5ffe3371bf9c9589bd51a141e48cc19710986. 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/GBKQU2237571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d49661bb7ac72b7cc030cb868bc7f8b6461065417745a70195f3a43a72a67. 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/QMANG2234419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7456aa6bf23f424ad54674fdd720d1999c29e57915a02dc13738b6cc46aaf280. 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/GBKQU2222434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac4da824f18ae395f79b42742aa95d61d9a5b50dadd56d7b0e839c6d05e521. 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/QMANG2234418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1172976e0e16f9b242c5df34f35fc64dee4dbbb9c5e6f5a99e41dda94cb76. 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/BXDS92200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afd0ecd16b1b74ced070ae8bc33563afeb51465fa3e55d6507675f7d6bae345. 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/TCAEU2087174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eff74c75f45ffff01d35144751b778dc21e5eaffc73cf2993f665cd1e933d5. 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/TCAEZ2059200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e279ab33925b0148f5266cca78066775bcc7582e80f55f1489a89a48ba802a6. 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/QM3DF2291443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1172976e0e16f9b242c5df34f35fc64dee4dbbb9c5e6f5a99e41dda94cb76. 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/BXDS92200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c329ef91aed3a710e437aa5893cd2bf8afdfaf4eb508fd43826ed2dbcf39d7. 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/QM3DF2258969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8563fc82d1e13d44920b217732f5c89054457e85d68fee43ddad87a21be1de. 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/QM3DF2258971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cab093ae9d0f1380eb1ef3ec316e1ebe4039ca90a8bbebb03d70ea4836d674c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKZGC2401741.
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 0x078ab54ab99a4bf6be6ca0947a9bbe601c93a2ce1ec001a55fd019eaf35cd6f4. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM3DF2120975.