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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eea9670defb47b77880c6a8d370a289fa13fb7b90c567c59564dae72f517d5. 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/ee52da04-1eea-47d8-a708-56b8bb27b6d3.json and https://artists.proofprofile.net/proofs/artist/ee52da04-1eea-47d8-a708-56b8bb27b6d3.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a5b1c290001e6b558309c6f6d933dd3b7f9bbb7d7cfee40c7d4f331d07f39. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEQ2232223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b61df07ed7c73749519214598018a1108fcc2e92b02f683dc17d7ebc8d993. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEQ2232225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31183b97ab421301c605e1243866d6e0dfbfa6b41c28449eb891a03e6266d92. 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/QZMEQ2232228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7565b38c1ba5dc5cd525406fe3e5d3ce161d3b3d11754f504efae3776c2da213. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEQ2232230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ade80bb11c79ecfea32b7dd4a0a45b5b13a03f9bedb5ccf43b5462ea53a8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEQ2232232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8b758d33c33d8612854a584fc97d93efe5ff0e7ce2257ea398addd042bbe4b. 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/QZMEQ2232233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ffde81e57b1eb12b4b034122c12c7a4f7c3f4a69d6c10726489a906b37b12. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDA52234804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1336d8c45222326f02ba90d74c70231d719a308bf32f9d6424e44d604beb1f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA52234805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9c06eb45091ca5bd4d06ccda4385a9f011e6d29dc08451172c803968a20b8f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA52234806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076fea789fead73fcb25446224dea96c1d2a3a838f5a0b83e4255231eba592fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA52234808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919ed102579ad1653141f34207d360dbfe0dd85ea9f2f049cd0c09874668de42. 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/QZDA52234809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b9c58a2eaeb2be1ae5af6068c56181feb1f1295dbf605613d97ce44ea414a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA52234811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbcec0843eb3fc3a76b06afcc3d8035e1bbfa2c6d45d488e54a855a3b19386d. 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/QZK6N2068001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8aa63331d878c521a52bd4c0a477bfd232680403a5f31eb3ddcf77672c72d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAX2236893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665a9cf2c2b0bc01fb91696cdf4b62118a8450a960106e75147ca136509059e. 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/QZNWT2277899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc526df323c37a228a99ada6822bc140f126f4f70b774e6bd39ca3d6a2a1ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN92274480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb3ff28f8f26edaa57cbc05efc18a6d2a535e71c2882d47e1ad6979246d1f7c. 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/USLZJ2204299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7fe11a4d4ea53144cf8387e452b7edd4f4906e578fa9b9873208b61e9170f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWQ2113911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30e9567cef4661d9e05574642435b07be1151550ad61ffe0a016d14c41f9b53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWU2052600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7f8c27ac66f576efe87ccbc414c95ea8ea783324fc45cb42b25d304e658e53. 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/QZK6G2053218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fbfcd2ce0b2696973943030b6ed121f79351da042de3a7b7247affd39602fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN82046148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420f71fd8982af4b3da5fb797c2352ebf04d891076a9961dd69a94560987379. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN42056407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6046aba1aef9776ae036902835e97d4c4c3d37721c208bb8a12810903d2165. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf70ea1f74660509fd808e9ea776cdf88be067f6d30c355f64f8bc3db36af1. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZES62035002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619235846815e3990968d2de1a35ae8f0a1bd2fbf0a380376ef8b9f3b177e90b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNB1947790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6ad156e9b1759dfe2728b2bcf51bad3851f931c580304e905460c0d4625b8. 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/QZHNB1967289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a387465dc17e3518e4555de44fd72a15b068d825cc0fbf312696265769919. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN71929741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc91d78f0957ecb2094937cc55b0dc9ed5dcfd6b71d76b0d9547f73be1e02b5. 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/QZHN61921022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff924044e49e0167f4f0dc57ffb79256654c281be1e0fce27bd6d71d793e6af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2476605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dfb19752daef30eb9e9dd3e3c7adfc62680c1401bcde161d3854cf1df89fbd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2204975.