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 0xfeebc64a2dc86b3390e42aa3043d0f6a76fb5731b507d5a3d959787e27f2157b. 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/505d316d-dab0-4048-83b9-b154633bc6f0.json and https://artists.proofprofile.net/proofs/artist/505d316d-dab0-4048-83b9-b154633bc6f0.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 0xe79c35a234640cfcf5c9b820f5a1abfc440fee2fc3faa379fe3fb01e790d89f7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:22Z), 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/USTC40809622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19084ddc5e7f8bd87ea3ec7fd97dbe3b53198a134ac300198e197f687d2a547. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USTCD1083832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a79ca4f840f54bb3abe35697b45dbe76efcd2d61084384e030f97121efbc11. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:27:37Z), 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/US6881000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e94c90dcbb9c97c7b8ffda00eea91aac49f1041da8a6dd40eabbe3b1114a0. 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/US6881000368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e38a1e338063bba1204e75fb90143f98e502ed5eda6093a4d3185174db1e1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US6881100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feb2a140fc21fe11e531b4ebaf8bc69e5ccff181fe7abac24520bebc0d892de. 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/TCACQ1657340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66c64270ba6061cf062e406485cdc6c051ec20fe05adb5138bf5dde9b73daf. 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/US6680917736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45580ddcd29b3a1f68c280d069f1bf269e6053e021da2540ea21f5c39772628c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6680917795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb5dd40d2e038a4db85d8930eb685a7d92a5a8d543e9c4c45eaf1a28ead715. 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/US92U1910798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e13c4b0533e8eeb63780935a81fba5c0f89da9d475610987995f7925c6399d. 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/US92U1910800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4966c22d6adb3e90a6445e909bbd2f122647eddbf5e462cbe75330da8458ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US92U1910802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef56ef014ddb6337f74857ae1987d098099530b0312e3ff1f2c55b68d67dc8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US92U1910803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f5434f578cebb4960cea2464c3fa00c41a575ac390184d9e3635f869db2cff. 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/US92U1910805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff7db3f78815c90fe1d007eb0b758e0ffd9987f123645b81df423d3a77e0a2e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US92U1910807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd839818527fa99193271bc27f6f4ee6a4120637b85a6fec749f66cc9ded9307b. 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/US92U1910808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071c65bb1c260c9d21cfb2c9b297b049862e52049a596192dda6b540a218363. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US92U1910811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6841c9042938d86a7f1aca0afe76554f84f6c69a681c16059dca91567bacb724. 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/US92U1910812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d379ebfd36d756270ca8eb52a118a0b3965bd880a038d755971d03d0d3f38a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US92U1910814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734069e81e9dd6b23f58431bdbdd195e938b75a004fed3512c49971fb65591c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USLD91753725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e14352ea7cc4b96af70632b96c1d1655ec525489ad13b27e52a7847b84038. 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/USUYG1373556.