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 0x81fcf5fdb4ede5dd073fd4d161ac8869114dc48daa9bd4e7cb7fbee792dfe7d8. 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/99ab9a24-0f39-4f1f-9599-e61b9dddddeb.json and https://artists.proofprofile.net/proofs/artist/99ab9a24-0f39-4f1f-9599-e61b9dddddeb.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 0xfa603aa4fda9337d8a428fdd0940e86bb9c2e374954ed4b734ddb4ce546de048. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X41783037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa603aa4fda9337d8a428fdd0940e86bb9c2e374954ed4b734ddb4ce546de048. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:50Z), 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/FR2X41783037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf587708ad754debfcbeede00f4e27b125fa99e6bbb24748d6f5f7e39f701d. 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/FRX201831139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bdff7d1381419a3f5efa48c8ac26d4c336e23e02f1cac4f8c1af31044ce35. 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/FRX201831140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e8b264bc58469a18cb786b79a4a2d9fbd99142920fae8785f02a858fddb130. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUA591901852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f47b832f574ea9b28345b974e70b497303eb68afa2f582a99fd8408998bdc6c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/RUA591901572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f928f527b3a09e0adeb12c0d3e5be04d902cb0309c8aa153bbc11f75998db. 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/FRX762040605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e9a0eab8384997b92062688bac84229716a18f799142e5b260d46a5772a85. 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/FR59R2213474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa489bbc0ac52d5e2a8f6bcea6d3acdd72816a9d469859fae398e734c7346636f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FR96X2267934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae4da546d5af5f1c63a8089f1dfe8fb7ebb13fa443c92cd72135f5f116c083. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX872200950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d440d6975cc6d7e205c0e3b391368acb93267b8e2cbf129042114ad01a00fb. 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/FRX872467647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f5d5a99013757cc9d98e8dc6307fab6229aac5b6bc0785b3be0bf54f0317ae. 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/RUA012100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8426d635ec0165141827be255465d882fc3742beb455de728ada81243b7099a. 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/RUA1D2469027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537576c6b0111e5ebb19e18669a82931027a3335a2666a4102b86b8efc8523d5. 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/SMRUS0078637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a280a43f8da878f25b547e5f631e9f0c342d14590ddd803b192ac6127e1992. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SMRUS0078638.