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 0x6f2d2eadb17ff9664d927fdb2b4f56aa866b3b0eb19819769b0e150b7d6c16c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af1b4b04-4ddb-4717-b02c-0e92eebab9ed.json and https://artists.proofprofile.net/proofs/artist/af1b4b04-4ddb-4717-b02c-0e92eebab9ed.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 0xec03512e1c7fa86f2b06c1615a96f7853c3817d80fc1e41fc448f2d629e80b56. 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/BX5CZ1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7684d8e488aee194263da9a5ba0aafc9fae9770b30c1abb47cabfbdaea2fb95. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNJV2183057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab1fcd9a7121cbe9dee7db67f2829581c12bedc88efd3f38e8de87bfe910409. 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/BXIV82288234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac34bc9882f14f2a94a83abe0390823dddedeb08346e54fe7c9c4e0783f7b8. 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/BXIV82273836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db4899707a42af7985f7f0c31d369edc2b4237cb958470ae683991851a55c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXIV82227967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6f636da61a538e1248ca1e38e25157f9f3da931420e2d1f4a7bb829e0d1dd0. 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/BXIV82242673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fabd2933b3d2747d5c13f6bb5880fb728cfa5fc1532abbb775f4488dc4849d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXIV82203418.
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 0x8fcfd0579604dd1257af36f66e384c92393fd428a486efe48d8dde097fa51dcd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BXIV82242944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1f01eeb5b95f26817f5edd741a088f4b24cf6c12b2130811fd69be8bbfca9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXIV82265956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb534449536b32441db694f3311459677e6da352f28766e470e224655346d58. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXIV82276303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd47d0b9b3c6b8c748ef0f4a22ade31f220d58da069a47f1bcb9561920d72ff. 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/QZ5AB2362678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72c04c478f2cbf31f6ec8d417e0c06fe94abaf9fb5aac9b01eb6f1d4fccdaf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:35Z), 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/US7VG2550655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341d09c8dbfcb7400d29faf5ea1bbfacd99c03a88712fdd535879012f73d579. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/US7VG2550900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02a9ae38e9471aa8e509e82bfb596b516a7d09a2602ec967de201570fe3bf12. 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/QZNJX2079930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c0afd1cf97e3975f5e0a2da73af3f8c186cd45361e94f8747ff86b51a6255b. 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/BXIV82383278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2291ae0192e2b92b72da3c09f7b59ed50de82e99bd0d21e20af1e5455ad612. 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/BCBBK2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1e13e8216eaa749f23c43642de88a0e9e48e2b3a992d9f8cfa24d201cc1b6. 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/QZW9L2464692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263dec71c6a9cc566536799bcaf366496f3979f5bef83adda1e02eb1dfd048cf. 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/BX5UA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0d43183cd7137ca2de18cc8c4df81e779c4b3f391b4295b939e5cc80ce94f. 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/QZNJX2041350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f1e93787eae76ef03e681ba51d9608f4a2318e6f9370edfd58ae7cc80c9c0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNJX2374932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a83872d6e5fe912631c35b0ddcb05fb8179a27ec51d2298da77fdef48c9cc5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BKLUI2400010.