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 0xe211e2511477267e8e4c070fc1a7dfe3766fe1c17196778908a39f17c6ee3f1a. 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/0b676d72-c1ce-46b1-aad8-fe15aa79066e.json and https://artists.proofprofile.net/proofs/artist/0b676d72-c1ce-46b1-aad8-fe15aa79066e.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 0xf03c06e87abcbc91072d25b9b1471a67a083b96b3043217aba9ec486268da395. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZYFZ2328452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a166c3f553669326e59fc7bc39151116c04f40c771daba20a598b74fb4f43. 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/QZYFZ2328454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3305b4bdbbb23b9b1796478e212f13a3977f9e439c4e69793f729c1543a7fe6. 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/QZYFZ2328459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b189dc4c75c63e0846fabf2b5e6a0901cb2b20718979d62a5fa9a1f4f2944a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ662306682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a43d277dba0a0d64e138b3ec7e26da5bb8e7b6ea52549ba082c0c83d92a0c. 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/QZZ662306683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1afccf67961fa4fb103d6782bf3851942d8ad621439afc6ec77f004d8351706. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZZ662365302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9d13bb55a96bc1a09002db04361a8968bc45c633cfcd8f35041aff7565e7f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZYFZ2365690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f663d6bc5bf1fe1aa545a297a90905bda979609d4bf0b37010a70c731cbd2a. 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/QZTBB2439686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e12486c5568b6c4c1476b488e5900cdaf97193f6a83e3f06b1339240f12112. 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/QZTBB2439688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6450d84cca865526770f95639998a2d1d204f690e49684dc3b4c24b526e55744. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTBB2439689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085481028230591423febbaeebeb6f4136b4fe3e62e8dd5c0b5e9086b8ff483f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:00Z), 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/QZTBB2439690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81a6013c24a8cd6b07ecace114b9c3477aa593a0efd5d726256484acb455f2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTBB2439691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16d2e2ad493d72e443c422dd4778a7bcaa55d9ef9cf1b06581c27d29897c521. 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/QZTBB2439692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fa17f9c26a88885bbd808f0070efdd8621c28c72c1c961e7e4e5ecc584b4b6. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:42Z), 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/QZTBB2439693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf43b2eb4588194207c6f22357c1c737b992f878f797e6adeafd532285096827. 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/QZWFM2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26700a207a35926ef8c45cca8a073763e2d28c6ef56b272cda3757618a489f24. 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/QZWFM2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ad2c22c524d47332d10180ae8af59ee04ec16d2cfbc61448b781c053e24b7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFM2400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49add9d333bbe1ffc723159c0587e2c66ba7e0a6612addbd2e5190ede83bf42. 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/QZWFM2400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3587ed6a2f672211788f91f300918f55dc8c8276e395b41693af6ea1a3dffd27. 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/QZWFM2400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3eb78046e9fff8dbbab39d3aab1ca214d12183222fe65fc873b9c673686d9d. 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/QZWFM2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0e634a7f6943f20420b5d6a190a9655c73eaa50504f4cf793da587c6ba3ff. 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/QZWFL2403600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52051a6b0e2672f57b5f8a747e300f6f0a2950e7f36d5a0c8ef8c83b076626e8. 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/QZWFL2403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c34d71cf5894b03f6ebba1d962abff932bf40cc89083a451950931fc01cedad. 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/QZWFL2403604.