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 0x998282f8de6e639fe672b61af9aed8841edad498335f843904aa960ca824bad0. 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/3e00bf4e-1c2a-486e-8e5e-f1d4de6edda3.json and https://artists.proofprofile.net/proofs/artist/3e00bf4e-1c2a-486e-8e5e-f1d4de6edda3.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 0x97a01314338678d4f6211e54486f9cd6f4b7b54b9bcf33bd346694ca6e6092ba. 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/ESA012060461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162162f94029adc2e8de96838f62f3f43398d529ca3022876fec512cdd550bd0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESA012060466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c03bc1eb645c3e849bcdc1c0759be474f3531dfea16ae11d2000c11817f7b8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA012060468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80255109499ab177f192a6a7372d860b2ed28916f46434a0902d8b41d47ae2e. 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/ESA012060472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e556cc88fb8665d09ccf0ad310349c210149c04aa36e3cbc6f583df4267083. 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/ESA012060479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe794f63998a856063613247111ee55172a8dce3880e821d726f4f5f0a9ee1e2f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLFP2123253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3208388daaa441b511a938531cf61fc08a44c9d90ed20767b1d352d4c346bd6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKXN21999186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3456dda965b9b0aee73d2c8336e39cd3f9ec13aab998a57789e35b172243e5ef. 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/GBLFP2123257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b92d8bb860f8b61f8191ac550d245380440772e40c215ecad566d82dc77966. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLFP2123259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e749df54a51cee53a7b787503832891292429856c33614d8f4906aa992dde4e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BK4DA2305437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294795498fabe8b1948a4ddf460a30d0ed5b61b63c6c5c225bb4a44704c47b6. 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/BK4DA2305436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03da6e4681d11db598c444582d5c9243c11cb4b9937cc3bce7d0a557af11dfe5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA011766001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e859ffa2c79e7d71419afb4ce7be1450f97c101163bcb618d83e72122e535. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES5152201493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc3649990cf60f80afb221d7643457cb72227bd04be5a94fc0dc1b6eac99da. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM4TW2022736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc3649990cf60f80afb221d7643457cb72227bd04be5a94fc0dc1b6eac99da. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW2022736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9a94b3298832eebeb8e3993b3336e8ba9dceca6de2e50667a4a1b6d711c766. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES71G1923669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc67a8c54c92cd10e2ca9c387cc45948ddbf11e8ee6e07aebc9e815ebe2737. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES84D2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80255109499ab177f192a6a7372d860b2ed28916f46434a0902d8b41d47ae2e. 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/ESA012060472.