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 0x878c68005b92ae63c698bb2b9b2b9040811e390730a2ab308c44bb65994d4d2c. 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/881b97d3-f011-453f-9bcf-e547971da24b.json and https://artists.proofprofile.net/proofs/artist/881b97d3-f011-453f-9bcf-e547971da24b.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 0x7840625ed633c0713cfbf66a491f40e3c42fb121e5f74d5a153be2b76245f783. 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/ES71G2056366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16005aa1c7b1e201a50abce92040a79757f6b106c0d1ff6f1f447166324b6f61. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDD2486343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338fdc8cb9a018f3a85b76dfc2740410181292ee7dd3f6cbe31f798f0b635bda. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5FN2397723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2271ab2c2811d4a9a3c2a7b930a5a38870ddd211e2adddca9af74e1a0114aeb1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBWUL2247831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68187f59584ac219878f33e671fc1089dc7a2a5cd27fd385fb2b98ecec985a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2063480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9d7579fe065e49b57326f39ca347cd284754c8ae23524af765e25d0f9397f. 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/QZWDE2434209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355cc8a0639356db7122ec95a9e780b2792c4e230afce34b2d8f6b471c21ee68. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWDE2434210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d3a7c9f980c466f1bbcb6f58c3f435271a4b5a06cfb744549a8f174a85e269. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTRX2458686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9d9692d9f457e930cd94cfbc704b659adb5cd11c4b1d177f20e5ba115372b. 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/GBWUL2456159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30398bed4b97638f213d078d2bacb00a9c9e4efb85bccde7b92db81f97034bfe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWDE2434214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7bccb5dc7fb82217eca7f79b8db2d346749d7a53f37e705ea279c1f0d7056. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDE2434217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48409fb9e6e77e6fa3e38d097a08ec548cc10849bd948a21b9a989a944acf179. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2421286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a29b03c53b0c6945ed2da56d0789d0155af3ff7e2a4f379c7a791fcc7f38f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZWDE2434220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70497318b4718f1bbd59fe7789ef7ccb3f4afb3d1e54426a147ae4709f88240c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWDE2434223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4620056e0ad9a3e280a516f605bbf2f7d96713f9eb24561e7447b0b7974f6b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZZ8B2326392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8900166a7e9d8d10267203693f26a78b4d59b91d372bb2de492a7bde976e9fc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ8B2326917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8266a6ead8e304346edc065398ddcb0bd5db01836d0a83ee8b6b1245b7c0ca. 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/QM6P42375337.