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 0x175fcf3484d02cf1e1752f9992e903a12efccddacd51b36c72dec00f4a262e1d. 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/8b4a111a-a02e-480a-8334-c9042c2a9cef.json and https://artists.proofprofile.net/proofs/artist/8b4a111a-a02e-480a-8334-c9042c2a9cef.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 0x3d7534d65589585c9279bd7f25110d58937322148c7e33c654894515e52fa3a2. 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/QM4TW2234992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a82dc90aa4a7bffd66d0b79e5f2f889f883464eed91813364f04f61583457b6. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QM4TW2234994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fb175290eaa94283e66fde5f3c83ae56bd2903d7fd35aeedea588425704f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TW2234993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb264c5e6895ad545caf8092b64452ce27ec9a5bcb2d84bb73aac981b6b919031. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TX2280846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da40d319d8b262df66cffbb60e8026c81ea0a7bfa85057bfaae87be2e323551. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMDA62287614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac4b1babe524f82b03688360a4c829f544a1dc3862299a5c4ad6ebe1ed94e1b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMFME2249033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc852c25b4f468a57f02c90f024bc7c4c804a5332b683cdb1558b22d7410fa8dc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMFME2249060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261ecb3280beedaa6d55dcc4a15dd3bf7820c20af784bf2c1842dd2b195ac556. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2320356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605becb34e1bb209933883405b18c276aeea918f0198b035d80a90a2418206e. 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/QM6MZ2301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83604c3b6fdaa883b47805aae59169fa6a85d21fa5e996f4e822494e246e000. 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/QMDA72348384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691a37f2f916490980787c75f88da43d3d8ac92203a64301d6dc978bc1def83a. 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/QMDA72378804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82943a3b2c35c08c2a90efe65f997708e13cac6a9cc1158a9c6f01fbbaf3252. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFMG2312244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0934def148884a3e4cbf366579a12431825f24207d5b9c537267e9fb4db40. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TW2442316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391622f6d8b0c1a27fe9e5dba97a6c728fa7292cecde9df6deb7c557d12076b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4TW2495653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8756de056752a5d2f50baa6cb3dac4bb268c5ae65af696b00a579b18cb0c09e1. 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/QM6P42402904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d354719a10358d8feff1dec5fe5c68ed9f3d1ca3b76cab46be6c2f43f5adbd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7282464669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd77d3c4983da6ba44fc53a2cb3b298762640f0804a5943d56bd01be20bf10. 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/QMBZ92499311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cebfc47994e328806a2a66cccfe94a6eabbe1ba0093faee44408174c4f01fa. 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/QMDA72409345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f7ca4287dd07d629b5444ce9c0d72e1de279e5b7e8ff130a13b0453e736b0. 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/QMFME2538978.