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 0xefde530e1d482dc42f50d90476f17c2242051ffa372c2ac1082e10240176bfb9. 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/704765bf-de5f-436d-813e-178209ea2f61.json and https://artists.proofprofile.net/proofs/artist/704765bf-de5f-436d-813e-178209ea2f61.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 0xd5de8bd9a3b132814c729c169d644b07a40a153b1075ff706386753518d9787d. 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/GB8KE2162814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7430674944418931e4a9b56b4180cc566feebab33355d44757199fdf539221d4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GB8KE2162984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa114ea7833ae6ece76c0dcf44e951aa8e44f9a1bd34d3f24dbc2ccae1b49a. 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/GB8KE2215077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d884bc0a93c061562ecf8f6726893b566632f7aa53f85519569f36a23365c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GB8KE2322419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0306eeb8029c9444b7562623714a431f5885f64203c0ea58e70f24a5b9951893. 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/GB8KE2324239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6d9aeee35cc236dc2830069a7b9d2ca5dba258240897e5226d55b6977f7397. 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/GB8KE2324850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a876851de4258992441c27ecd36db37679624efbdf48327ec8caf4d0fac7752. 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/GB8KE2325419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c2fec2811812cf78c281ee9aa0e7c0c2cbe619fa68c9328537922d74e64cc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GB8KE2325927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ade4b080692a8ebca6689f919c19008b4ca3647edca87b01dcf35a3f2df01. 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/GB8KE2328468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87576707e2b891d7166dc7771220a46232e0cda8a512908b6d20ffc3c20d640. 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/GB8KE2402233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7443b3177a6b048492d80c3c8f976ce858b8806a2db6ab258d72ee60de47a0b0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GB8KE2404472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7fcf108a0b6af6715c2f9a41386e781a6eb4d26d98b7921650c71a7fc3ccd9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GB8KE2407027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d2cc5fa02e01764ad3dcd7d85a0b8e948d3a8ed9bcfcfa7d18f04145027262. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GB8KE2410824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a0695be0e92cea02fb719452179215d8f21bb647902fa57b804486c478b33. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GB8KE2501286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb071264f8e3725121ae87db320206aaa6f01c1e8eb5a76ac8dd2b0368edc14fe. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GB8KE2510138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60199d151e7fb7964c6e87b139c5b83af1b078ebb7e77dfa8791a87a2140df90. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2519207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7579b30873a9530b74e446dfc01cb6e79932911f6c794834c686efd08c71fa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GB8KE2520242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b6fd5a4dcdc5f64ec21dcef1f1670da7a948a7678ef332bb7fb5701bc01dc. 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/GB8KE2524263.