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 0x806cd9c67363f8386abde79eddd121580165a06c5694a13ba9317ec5a1c4a662. 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/005f656c-8148-4ff5-93a1-53f5a732d999.json and https://artists.proofprofile.net/proofs/artist/005f656c-8148-4ff5-93a1-53f5a732d999.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 0x3eb62a081bdaddc5724096bec048404512ac33e8b6caf39ff0c153b3d9396497. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBF2392072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7ef8aca421638e12e2aeb6acc741a82bfd52fc5e43c2d52e54682722ae6b8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFL2333436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c46466fa77b411914d1cff0889342bcba5f82e43763f241094350bb9480487. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES52435624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ba8b9ec8b1db4e4da03f3c0cc6e9534c0d3680f838eac1be70dfc789c7a4c. 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/QZES72498640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5953462e0fa8a27d7058b16be4fdcf7f87817388d9357b4410c143611efb54ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:49Z), 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/QZNWU2480642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24ca31228cd95971959e2900da973b490cd78b14a0c7d7394c71c2e5201f0a1. 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/QZWFP2432275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464874ebf6666f24db78d25af4ad94224911fca00c2c299529286cf82a671eb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZWFT2498238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c6f9676bdd0526d85d1e0fddac8709528de93f6eba677ce84b709680b92b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ772423881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef13d66fc711d6ca01c27ec21ecc69408084f9f3bd5287ef46537e8b563bd7c. 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/QZZ7M2451211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46fe9ab479435f7d6f079608ea5c26bacad00471bedf87e04c34a2483263055. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7K2485835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec5e2490ea9b858d1b592cb73a98eb565d1a7a00d8adb8306064c519c33a4ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7S2494978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbdd37a55a8574480f181ca157fbf99aaf03e2ef2697e026537c9e93249eb8. 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/QZZ7S2492482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e6f06139b05b5a480f4851130c2fef9698d4c32d061c13ae93113a886d4c75. 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/QT3EX2439253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a2d819e8a86ea354c385e6e0768b77008dad4abb6775d9a688d7cfa140066. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:39Z), 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/QT3EX2439347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2539d46e8ff865bed038c3ae17043a58990614e954e5c88860a12eef33aaef. 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/QZFYY2508310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb151b54ea416edd5cdf187b437079f88eaa7491e5a431f554d1828778063b1. 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/QZDA62527149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae9c5042a233d3835fb18539e75b0d3a5b7219f0f553a5e7baed5c6da25d113. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZDA62527150.