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 0xc2c62dd6968668d6de844be8cfefdf537f98d0ab3573af2eb90af1acfc4af296. 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/7f4d2173-7d16-47ac-9f51-f737dfaed014.json and https://artists.proofprofile.net/proofs/artist/7f4d2173-7d16-47ac-9f51-f737dfaed014.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 0xa27463ecad5d778b017a7b20cf269bd37cc3670371628a027a8ad04fde4fbe8b. 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/USLZJ1983198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac3e66d53c508023c1c3e86f6272c039857eaead55b8f9332c872453b8ea084. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLZJ1983201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c3cca5f2297b2848902c6589091eb848aa9fc138d84989532fb9a45d94dfdf. 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/USLZJ1983203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f7cf5706a18c0957a1d59ddbf9c5f36b90957dac9b780234e393e507b6635f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:29Z), 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/USLZJ1983205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8007d585bf655862de996ba10a2268e58e0daa9c88c10f925c4fec0d032234e1. 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/USLZJ1983207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575a7a2dae7bbee55766272aa11ef6c44933ed81b2831652ea535d4ea6b3bb0. 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/USLZJ1983211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa0f64c89cf8c786bd9d896ec0bd6f1bbc31257630379eec8ba5fccec92c5a9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USLZJ1983214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cda8bdcad34e75dceade37fec8e69e19f28210263c5aa739ae3a7b223d1f87. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USLZJ1985404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2e4b63541e73c46a4791bc8816f582ed17c1544c72e22d5ba9070451984a7e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USLZJ1985405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a90474cb262d6a5fc811f1878134bcc3b21820c95fcaf0b661943cdaf26c7. 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/USLZJ1985407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac06859852d783b57cd3aca3f5dfcdd2b53db1cac7f0517c9f93544bd64c6f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLZJ1985409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17c747eebf6304831056c9f1b39149d5111a3c2cf07495db41d99f1c06a1db. 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/USLZJ1985410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0930ef3966999781f5a6167afd27fc72b2883646446e15cbe32cdb9cbf35d8. 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/USLZJ1989880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc287a26eda91f8c0c45853b8890dd855aa6e243a1f87d193daa95c1195df1. 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/USLZJ1989885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71f21a3739218401403baa8e788b83f709946f2902bf8d93d5ba0fb344c5640. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USLZJ1989897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa114a89b7fd2b719aa9ba0510d473b85bb5ccc72b752c50eddef6b4ef36a64ba. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USLZJ1989899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee95121cf5f71877d3218d714d6ef0a0af16f04d3e5704ac3b84e396e282f30. 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/USLZJ1989901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ee475655b06fcb6fd86dcabd067e19b47bfa9ab8eb411fdfd1a10ffc45123. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USLZJ1989915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd308b1e0143af749431e6ced4c07dcd78489cebf12e06748c5d4353f1aa585af. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USLZJ1992153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2e955be068fc9622bf68f2670ecdade85feee33d0faef6b47959a604895175. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:09:46Z), 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/GBWUL2043857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea387a90ee9641e793a12fbc8c0c278065cd04ed3f64496cf056a23dc494f6e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZ5FN2151843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6bdd223aaf5ea6520cb11dfc1f05790578f7bb9f8e26ec0614e76901b562fd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PYC842413615.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258ef84517e27ddc7b4a9b09bd5a4f0413230aa3d8e0b18a344289c034e748e9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:35:51Z), 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/PYC842413958.