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 0xdc3a666c8351bbde41c4871a899ea11e0702ea81fc78d6730879b6a87caddbd1. 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/9a6f629d-3b63-4ba1-a87b-bf81b05dbe60.json and https://artists.proofprofile.net/proofs/artist/9a6f629d-3b63-4ba1-a87b-bf81b05dbe60.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 0x7cdb0df12bc00e2305d87b3e20add36e2d43b17a5f1a98cfec90513ba2d284d0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DSA885522116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555c2f2fcfb70ca2a9ef7dbf344059c0d0b44a13e127778b5bd0145c08c41697. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DSA121235234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdb0df12bc00e2305d87b3e20add36e2d43b17a5f1a98cfec90513ba2d284d0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DSA885522116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579faf8735f20847907ef9920ae0e9f74799ff73f7da02875f7c07afd2e22bf0. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/DSA365214569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83732cac5c058a720b5721ba696fc776b970b51c1dd68b99d725259f249b6676. 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/DSA521421235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5dc0a65de4d98b57f7a0f60da753870eddcd0f8d101cfd70cc7e1fa19c7501. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DSA253648968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b68038f91c652d46ec79075a8fff9b5c3ed214b702132078111c2f0bde32fab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DSA036542983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa896d3bb5e010094c7298f3e2fc10dd656ce0ce664d4bf129fcc2efe31339. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DSA025354689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699450e5ba1255afff5e0eff27bd197c4e685ba579651068df2950d78025db4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DSA251423253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005ae0329792f91d735a544c92d76a3fdfd8d83ed2791d7a9b0b9acddce9b0b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DSA365241256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f46c7360884bb130eb46d9ceab01a1004d5992595391fa718d6b2d0d8f9dccc. 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/DSA336258412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef72e68d3283a4b55a5e607242c39be1b4407c3d9993cf334e1e5b6ed3335f61. 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/DSA053632369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6a32add8dd317654360bbf69e9f9155a862283ec980bf69bb2c7e1b23619f. 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/DSA055369656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cb28232d8393b98c7209aa4506f64408b13efc8ad56a602b6370955f0b617. 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/DSA252141245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e08709cc6e20d0f28dacd41dab1d29b8eecd191b8a293829a04420a3c21e84. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DSA053698659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb942e28fa86d22270e7afc0ada3c77171dee659ae797c7fc0bc33c1bf748f. 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/DSA259143698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579faf8735f20847907ef9920ae0e9f74799ff73f7da02875f7c07afd2e22bf0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DSA365214569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83732cac5c058a720b5721ba696fc776b970b51c1dd68b99d725259f249b6676. 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/DSA521421235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2149683cf30a86e267ba928230367b01614488ca870da5ecc20927c50daf25a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DSA987414527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b8c5fdcaf69191508ebedf6de1556025149dafd9a5e524f343f6169df23579. 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/SAA253541689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005ae0329792f91d735a544c92d76a3fdfd8d83ed2791d7a9b0b9acddce9b0b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DSA365241256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f46c7360884bb130eb46d9ceab01a1004d5992595391fa718d6b2d0d8f9dccc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DSA336258412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6a32add8dd317654360bbf69e9f9155a862283ec980bf69bb2c7e1b23619f. 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/DSA055369656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaa6bd213a8c5c317a1439ae7b8a53de90c834d4d43a4e14e9358198df9beff. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DSA253145689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e08709cc6e20d0f28dacd41dab1d29b8eecd191b8a293829a04420a3c21e84. 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/DSA053698659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac4d12e9c0b17f5d842a3d05ece41a04c386f66085b7082d68352307fe732eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DSA025836593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9695249c1e23f53ed5dfdc1200fe3602e76c9d0f2febdf541e4cea030b697dbb. 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/SAE021345679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f9ce8c9f2726cd18bc70b6d942ccd18b398f24743441b84aa9cedb36587a3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DSA281412142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935a5cef1054cbe6266a9f3f78930ffa09e75671a63da3bb4654e91ac0155d0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DSA251432169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9164c66b617ed21e66d9fafce4afbdbe3dc15d0ba5d539b48e7bd503ff71ba. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DSA251421596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66b3edf1f9149cc2c20d4a099371625a79c953c1cad913c5dc3e42cf7a0c88c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DSA251412142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9164c66b617ed21e66d9fafce4afbdbe3dc15d0ba5d539b48e7bd503ff71ba. 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/DSA251421596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e538477888f2b4b828bdefab6fe4ea59e286a94754303fb4cf4d45daf5e22. 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/DSA212362123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea155787d6667219683401ac20f7cc722307cf6ebef88554dff1e92098fa48f9. 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/DSA252131253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bc39e004711ebdd79ec150324f5dc742ff65cc305304dc4644d1dc36f72584. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2557694.