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 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 0xcd7e177a7f8c3a258c3b29556aa31e1c871aef13ce020d61ada3733fb71923f0. 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/43dc75cf-a63e-45e5-86c7-95f03e27e115.json and https://artists.proofprofile.net/proofs/artist/43dc75cf-a63e-45e5-86c7-95f03e27e115.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 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 0x3edd2c1c153af8580708a69d70786daa00aba3c691f644781723f260c42ef294. 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/BK4DA2402128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8229cc3fc5d8cd1382a4446ed97f3fca885f0e806fd508bf61f859849d2a3. 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/QMANG2207534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193bd2d8497a8fa90d3760ed7a10bb1be51e00555711d8922a40aca1d2368aa8. 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/BK4DA2300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8694650309bd1c69e8c8fb64ac7e4849b4f5f3f5f54ef4b6852352708cf2b. 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/USANG2226490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e562590a26ff943fd170ed4e788386aaa8132217b27ea0dd3d0da7f75cc01. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZZOPM2239314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8caa8e9f508a92b3eca0f73a67d62a680645217447d0f2908db6dfdafe77b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US3DF2262917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ce0007d4d2abd7f38a77434e9b6c2b725c3985afeca78470f72db6f1c0ec04. 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/USANG2240413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8b8a94f2f68845df2f18029f853ae93dfa9d308d1f7f3869e60c6dcd1d5b6f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USANG2259411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2c39c3e3ef4ec051a4461463423339e01557cdf9e23eea3c747e8279ad175. 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/USANG2259412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece926a5d4991e331ef1934d245f63f3a564c39197e2f22c8a3c82353e0d8c7. 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/USANG2259414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28101c1adc11adb6e7d9f979484a0059826fd926d0500708e4ffa0afe7484b34. 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/USANG2259415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a38a9918837623cc04217ca7c4284ec7d633b0f96fe81ee756b28b5ab95e338. 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/USANG2259416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6bb35224340875779750b8031c09606114f8b6e740f62d50db2d40ff0d3b78. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM3DF2219075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84571a683dacc00ab2c0ea956877a92862bc867bc235565be67137f4c6700e. 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/QM3DF2219076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf758ba353deb7aa934247c32225879c98f42504dca5fa70e9d64ce7cd6879db7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM3DF2219077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5130c436c350400233a09796085425052ceafeb2e1bcad28e6f04d7741424. 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/QM3DF2219078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d9dfa1cde110325b584744fd155d89ac520c0b35ba5891daa7339fac35ec5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USANG2270816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811107fa423b295dd16616bcdc0f62651e3b6b0534907cadb29f0948199f72a0. 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/USANG2275640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab2e13f74d9ce61b829ec83c690bd492d07b40dd1af542dc743da77f034bc2a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USANG2275674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ff53ba18606161a5d41761af6939021271f7020d8a5c8c1cf2532c2bc0d09. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM3DF2219079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1dbab21be748254e26a5dbf5b8f54407197237ae60f1f881fb9e4d2d941564. 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/USANG2212088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf61d2f4a59202b4af2a15f5348e92cae4c2b29ba93d94da701bd6b6d9e8ec3d. 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/QM3DF2219080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965d81de26220521da8315aebae771c95bddd0c486adfe52e62ec1a12e60e8e. 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/USANG2245855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0673d03165edd82e04c66fa5b3c67eff21e2cd02c8325cfc84334fc0d62e8bdf. 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/QM3DF2219095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45be77ed71c8cc4b6e6200b8b26b2f3c946140c804daeb623970d6fe56ad8049. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM3DF2219082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fd8e732422a85898e7d71c5589b64c1c9422418c99a0d31fcb2982f62e8fc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3DF2219084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db879a35cfcf962eb12bf6e68ea1b68b6d7a837785a1a0ca189dbcc636bbcd. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM3DF2219086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186265270b842bca3a286663d052b65a84793ac2443796c0115099c17e2d5b0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM3DF2219088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96024160f01c3903d6f2c70a76697e448ec0f5c663f0372370614e3a91683f38. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM3DF2219089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163c7e71e1985512b3d66c6c01ff83be16b11f0d7fc90312995d51011c6fc91. 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/QM3DF2216106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52ad19eb634071ac9ae7845854da4b016d68b09433c6fb5a2cc52a7f75ddbe. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US3DF2511744.