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 0xbf93c83e824e10026c036a799e6647072b72b5e8a0a722e886f8f55fb51fc2da. 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/d2afc962-7648-4dc6-9e74-da33b8c40c3e.json and https://artists.proofprofile.net/proofs/artist/d2afc962-7648-4dc6-9e74-da33b8c40c3e.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 0xb41d447ed835e6c84620e6518e1e0cb7b966c1502dcd6d64eb99a9d486d164bb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCACS1699306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca537ca66de13d81bead9f2f5361cce966f3c79e8f1bfe4c1d1127d55731526. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADY1858718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845fb0df497884da7056188c560ecc9a8eaedd6bc5f8f50b85b3d2e35f1741dc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:21Z), 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/QM42K2004504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dca0993607612058ebbbea0df79b6b0b329a9721af5efe8e770f18f2f21695. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:46Z), 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/TCAHF2305216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6829b8e3a79fd85fccff2359758e1c2207f3a0890818ffa2a148622780d915c2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHH2333516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e4738c2f0eb60d05b35aadfecebb90da27ffdef3cda82f2462fed2170d98d. 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/GBEWA2301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d362f66a6dbe5cdac15b18d27962904d9d4d5ec05fab0370a305a369f39f80e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2206340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70105eebe3b57feb38233ece0469ac55a0f52a2452f7a52498104584134ff154. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBEWA2307413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e0a0f67406fda53b8eaf291e720a4ad5a2916600e5165c2e943cf1ee94af06. 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/GBEWA2303940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e4738c2f0eb60d05b35aadfecebb90da27ffdef3cda82f2462fed2170d98d. 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/GBEWA2301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e4738c2f0eb60d05b35aadfecebb90da27ffdef3cda82f2462fed2170d98d. 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/GBEWA2301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e4738c2f0eb60d05b35aadfecebb90da27ffdef3cda82f2462fed2170d98d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBEWA2301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e4738c2f0eb60d05b35aadfecebb90da27ffdef3cda82f2462fed2170d98d. 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/GBEWA2301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45725f31f89b23fae8bff5b5cca1b035dfdea079f03d90cc916152628ff7df6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12103230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b08a02b657aa5db65c7499cd4deb19c5c4e94f452e128bc6a279f3134ce461. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBEWA2307414.
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